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Laboratoire dՃtudes Spatiales

et dÕInstrumentation en Astrophysique (LESIA)

P™le PlanŽtologie / Planetary Sciences

Observatoire de Paris 92190 Meudon, France

e-mail: thomas.widemann@obspm.fr

office: Building 10, Room 21

phone: + 33 1 45 07 77 38

 

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ConfŽrence internationale

International conference

Observatoire de Paris

Ch‰teau de Versailles

21-22 June 2017

 

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Dynamiques Patrimoniales et Culturelles

47, bd Vauban 78047 Guyancourt, France

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office: Building Vauban, Room 309

phone: + 33 1 39 25 56 44

Page personnelle/Home page - UniversitŽ de Versailles Saint-Quentin  - DYPAC EA 2449

http://www.eurovenus.eu - European Union - EuroVenus G.A. 606798 2013-2016

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ACTIVITƒ DE RECHERCHE / RESEARCH ACTIVITY

 

Ma recherche concerne l'exploration spatiale et lÕobservation sol de lÕatmosphre, la surface et l'intŽrieur de la plante VŽnus. VŽnus diffre de la Terre par de multiples aspects, en particulier l'absence de tectonique des plaques, qui a faonnŽ l'histoire gŽologique, la topographie, le climat et l'habitabilitŽ ˆ long terme de notre plante. Nous nous efforons de rŽunir, au travers de campagnes au sol (CFHT, IRTF) et la proposition de nouvelles missions spatiales (NASA, ESA) les donnŽes utiles ˆ la comprŽhension de la formation et lՎvolution de ces deux mondes aussi diffŽrenciŽs aujourdÕhui. Nous collaborons entre Žquipes en Ile-de-France (LESIA, LATMOS) pour fournir un nouvel instrument, Venus Emissivity Mapper (VEM) hŽritŽ des observations de la surface de VŽnus vers 1m par l'instrument VIRTIS sur VEx dans les fentres IR c™tŽ nuit, en relation avec les mesures en laboratoire haute--tempŽrature au DLR Berlin (J. Helbert et al.). En Europe, ˆ la suite de la mission Venus Express et du projet FP7 EuroVŽnus (2013-2016, budget 2.2MÛ), il est proposŽ dans le payload instrumental de la mission M5/EnVision (R. Ghail et al.) ; aux US, comme l'un des deux instruments de la mission NASA/Discovery VERITAS (S. Smrekar et al.) proposŽe par le JPL/Caltech. Plusieurs autres projets d'exploration de VŽnus sont proposŽs ˆ plus long terme auprs d'agences et du secteur privŽ (VISM, VAMP). Enfin, nous abordons ces activitŽs dans une perspective historique au travers d'actions d'enseignement et de dissŽmination en SHS (collaboration avec Caltech/Division of the Humanities and Social Sciences).

 

My research addresses both Earth-based and space exploration of the atmosphere and surface-atmosphere exchanges at  Venus. We are summarising lessons learned from VEx data analysis and the other WPs of EuroVenus (2013-2016, 2.2MÛ) to feed forward into science requirements for future scientific investigations of Venus. Venus differs from Earth in fundamental ways: it lacks the plate tectonic system that shapes EarthÕs topography, geology, climate, and long-term habitability. New observing campaigns (CFHT, IRTF) and proposals for new space missions (NASA, ESA) will gather useful data to understand why the two planets so similar in origin and size, have evolved so differently. We collaborate with teams in the Paris area (LESIA, LATMOS) to provide a new instrument, Venus Emissivity Mapper (VEM) based on experience gained from using the VIRTIS instrument on Venus Express to observe the surface of Venus in the nightside infrared windows, in relation with the new high temperature laboratory experiments done in DLR-Berlin (J. Helbert et al.). In Europe, following ESA's Venus Express mission and FP7 project EuroVenus, it is proposed as part of the M5/Cosmic Vision EnVision proposal (R. Ghail et al.) and in the US, as one of the two instruments on board NASA/Discovery VERITAS mission (S. Smrekar et al.) proposed by JPL/Caltech. Several longer term plans address Venus Exploration across agencies and the private sector (VISM, VAMP). Finally, a historical perspective is given to this research in the framework of our tenure-track faculty teaching and dissemination activities in Humanities (collaboration with Caltech/Division of the Humanities and Social Sciences).

 


ACTIVITƒ DÕENSEIGNEMENT / TEACHING ACTIVITY

 

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OBSERVATOIRE DE

PARIS-MEUDON


Master Sciences de l'univers et techniques spatiales

M1 : AA1-4 Histoire de l'astronomie

M1 : SDTP-1 PlanŽtologie comparŽe

JDA DŽcouvrir l'AntiquitŽ – ENS / PSL


 

PrŽsentations du cours AA1-4

 

 


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IECI - Licence de Lettres

LHLET525 Discours savants aux carrefours des cultures

LHLET606 MusŽologie et mŽdiation des savoirs

LHHIS109 Arts, cultures, patrimoines

LHHIS672 Archives, bibliothques, musŽes


 

PrŽsentations du cours LHLET525

PrŽsentations du cours LHLET606

PrŽsentation du cours LHHIS109

PrŽsentations du cours LHHIS672

 

UNIVERSITƒ DE VERSAILLES-SAINT-QUENTIN-EN-YVELINES

IECI - Master Histoire culturelle et sociale

M1 : MYHIS133 – Recherche en histoire culturelle

et sociale de l'ƒpoque moderne

 

PrŽsentation du sŽminaire

Programme 2015-2016

 


M2 planŽtologie et exploration spatiale

M2 : Introduction : Le systme solaire et les plantes


UFR Sciences

Licence MathŽmatiques-Physique, Physique

LSEN690 Astrophysique S6

PrŽsentations du cours LSEN690

 

LSCG274 Histoire de la Physique

PrŽsentations du cours LSCG274

  

 


ACTIVITƒS DE DIFFUSION DES CONNAISSANCES / DISSEMINATION ACTIVITIES

 

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2012 : the Venus Twilight Experiment

Lightcurve Films - 5 April 2016

2013-2016 : EuroVenus episode 1

WhiteFox Pictures - 8 Oct. 2015

The Venus Emissivity, Radio Science,

InSAR, Topography, and Spectroscopy

mission (VERITAS)

The Venus Atmospheric

maneuverable platform (VAMP)


2014             EuroNews/Space : Ë la rencontre de notre voisine VŽnus – FR – Close encounters with Venus - EN 

2014             Une premire astronautique : l'aŽrofreinage de la mission VŽnus Express – Le Monde

2014             JournŽes DŽcouvrir l'AntiquitŽ ˆ l'Observatoire de Paris, Mar. 25, 2014

2013             Dec. Le projet EuroVenus, Radio-France-Internationale, Chronique de l'Espace, Dec. 7, 2013

2012             Our last transit of Venus from Lightcurve Films on Vimeo – June 2012

2012             The University Centre in Svalbard (UNIS), Norway : "History of Venus transits"

2012             Science News@Analysis, Vol. 336, 11 May 2012 : Venus's Rare Sun Crossing May Aid Search for Exoplanets


OUVRAGES COLLECTIFS / BOOKS

 

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Venus II, S.W. Bougher, D.M. Hunten, & R.J. Phillips Eds., University of Arizona Press, Tucson, 1997

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Ç Le passage de VŽnus È

Direction : Jean-Eudes Arlot

EDP-Sciences

Mars 2004

 

 

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Ç Matire et matŽriaux,

De quoi est fait le monde ? È

Direction : Etienne Guyon

Mars 2010

Prix Roberval 2011

ƒditions Belin-Pour la Science

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Sciences et CuriositŽs ˆ la Cour de Versailles. RŽunion des MusŽes Nationaux, Catalogue de l'exposition, ISBN-10: 2711856836, Nov. 2010


PUBLICATIONS

 

2011-2016

Publications internationales avec comitŽ de lecture

Peer-reviewed research articles

 

[A39] Piccialli, A., Moreno, R., Encrenaz, T., Fouchet, T., Lellouch, E. and Widemann, T. 2016, Mapping the thermal structure and minor species of Venus mesopshere with ALMA submillimeter observations, submitted to Astron.Astrophys.

[A38] Machado, P., Widemann, T., Peralta, J., Gonalves, R., Donati, J.-F., Luz, D. 2016, Venus Cloud-Tracked and Doppler Velocimetry winds from CFHT/ESPaDOnS and Venus Express/VIRTIS in April 2014, ICARUS_2016_255, accepted. 

[A37] Encrenaz, T., Greathouse, T.K., Richter, M.J., DeWitt, C., Widemann, T., BŽzard, B., Fouchet, T., Atreya, S.K., and Sagawa, H. 2016, HDO and SO2 thermal mapping on Venus. III. Short-term and Long-term variations between 2012 and 2016, Astronomy & Astrophysics, Volume 595, id.A74, 15 pp.

[A36] Pere, C., P. Tanga, T. Widemann,  Ph. Bendjoya, A. Mahieux, V. Wilquet, and A.C. Vandaele 2016,  A Multilayer modeling of the aureole photometry during the Venus transit: comparison between SDO/HMI and VEx/SOIR dataAstronomy and Astrophysics, Volume 595, id.A115, 9 pp.

[A35] Tinetti, A., Drossart, P., Eccleston, P, Hartogh, P., (É), Widemann, T., (É) [240 authors] 2015, The EchO science case, Experimental Astronomy, Dec. 2015, Vol. 40, Issue 2, pp. 329-391.

[A34] Dias-Oliveira, A., Sicardy, B., Lellouch, E., Vieira-Martins, R., Assafin, M., Camargo, J.I.B., Braga-Ribas, F., Gomes-Junior, A. R., Benedetti-Rossi, G., Colas, F., Decock, A., Doressoundiram, A., Dumas, C., Emilio, M., Fabrega Polleri, J., Gil-Hutton, R., Gillon, M., Girard, J., Hau, G., Ivanov, V. D., Jehin, E., Lecacheux, J., Leiva, R., Lopez-Sisterna, C., Mancini, L., Maury, A., Meza, E., Morales, N., Nagy, L., Opitom, C., Ortiz, J. L., Pollock, J., Roques, F., Snodgrass, C., Soulier, J.F., Thirouin, A., Vanzi, L., Widemann, T., Reichart, D. E., LaCluyze, A. P., Haislip, J. B., Ivarsen, K. M., Dominik, M., J¿rgensen, U., Skottfelt, J. 2015,  Pluto's atmosphere from Stellar Occultations in 2012 and 2013, Astrophys. J., 811:53.

[A33] Luz, D.,  Read, P., Widemann, T., Piccioni, G., Drossart, P., 2015, A first quantitative comparison between the Venus polar vortex and terrestrial hurricanes, submitted.

[A32] Limaye, S.S., Bougher, S., Chamberlain, S., Clancy, R.T., Gilli, G., Grassi, D., Haus, R., Herrmann, M., Imamura, T., Kohler, E., Krause, P., Lebonnois, S., Mahieux, A., Migliorini, A., Montmessin, F., Paetzold, M., Piccialli, A., Rengel, M., Rodin, A., Sandor, B., Sornig, M., Svedhem, H., Tellmann, S., Vandaele, A.C., Widemann, T., Wilson, C., MŸller-Wodarg, I., Zasova, L. 2015, Venus Atmospheric Structure : Intercomparison of recent observations of thermal structure and density as a step towards updating the Venus International Reference Atmosphere, Icarus, submitted.

[A31] Reale, F., Gambino, A.F., Micela, G., Maggio, A., Widemann, T., and Piccioni, G. 2015,  The transit of Venus : probing the upper planetary atmosphere, Nature Communications, DOI :10.1038/ncomms8563.

[A30] Marcq, E., Lellouch, E., Encrenaz, T., Widemann, T., Birlan, M., and Bertaux, J.L. 2015, Search for horizontal and vertical variations of CO in the day and night sides of lower mesosphere of Venus from CSHELL/IRTF 4.53 µm observations. Plan. Space Sci., doi:10.1016/j.pss.2014.12.013

[A29] Machado, P., Widemann, T., Luz, D. and Peralta, J. 2014, Wind circulation regimes at VenusÕ cloud tops : Ground-based Doppler velocimetry using CFHT/ESPaDOnS and comparison with simultaneous cloud tracking measurements using VEx/VIRTIS in February 2011, Icarus 243, 249-263.

[A28] Braga-Ribas, F.., B. Sicardy, J. L. Ortiz, C. Snodgrass, F. Roques, R. Vieira-Martins, J. I. B. Camargo, M. Assafin, R. Duffard, E. Jehin, J. Pollock, R. Leiva, M. Emilio, D. I. Machado, C. Colazo, E. Lellouch, J. Skottfelt, M. Gillon, N. Ligier, L. Maquet, G. Benedetti-Rossi, A. Ramos Gomes Jr, P. Kervella, H. Monteiro, R. Sfair, M. El Moutamid, G. Tancredi, J. Spagnotto, A. Maury, N. Morales, R. Gil-Hutton, S. Roland, A. Ceretta, S-h. Gu, X-b. Wang, K. Harps¿e, M. Rabus, J. Manfroid, C. Opitom, L. Vanzi, L. Mehret, L. Lorenzini, E. M. Schneiter, R. Melia, J. Lecacheux, F. Colas, F. Vachier, T. Widemann, L. Almenares, R. G. Sandness, F. Char, V. Perez, P. Lemos, N. Martinez, U. G. J¿rgensen, M. Dominik, F. Roig, D. E. Reichart, A. P. LaCluyze, J. B. Haislip, K. M. Ivarsen, J. P. Moore, N. R. Frank & D. G. Lambas 2014, A ring system detected around the Centaur (10199) Chariklo, Nature, Vol. 508, Issue 7494, pp. 72-75. doi:10.1038/nature13155.

[A27] Boissel, Y.,  B. Sicardy,  F. Roques, P. Gaulme, A. Doressoundiram, T. Widemann, V.D. Ivanov, O. Marco, E. Mason, N. Ageorges, O. Mousis, P. Rousselot, V. S. Dhillon, S. P. Littlefair, T. R. Marsh, M. Assafin, F. Braga Ribas, D. da Silva Neto, J.I.B. Camargo, A. Andrei, R. Vieira Martins, R. Behrend, and M. Kretlow 2014, An exploration of PlutoÕs environment through stellar occultations, Astr. Astrophys., 561, A144.

[A26] O. Mousis, R. Hueso, J.-P. Beaulieu, S. Bouley, B. Carry, F. Colas, A. Klotz, C. Pellier, J.-M. Petit, P. Rousselot, M. Ali Dib, W. Beisker, M. Birlan, C. Buil, A. Delsanti, E. Frappa, H. B. Hammel, A.-C. Levasseur-Regourd, G. S. Orton, A. Sanchez-Lavega, A. Santerne, P. Tanga, J. Vaubaillon, B. Zanda, D. Baratoux, T. Bohm, V. Boudon, A. Bouquet, L. Buzzi, J.-L. Dauvergne, A. Decock, M. Delcroix, P. Drossart, N. Esseiva, G. Fischer, L. N. Fletcher, S. Foglia, J. M. Gomez-Forrellad, J. Guarro-Flo, D. Herald, F. Kugel, J.-P. Lebreton, J. Lecacheux, A. Leroy, L. Maquet, G. Masi, A. Maury, F. Meyer, S. Perez-Hoyos, A. S. Rajpurohit, C. Rinner, J. H. Rogers, F. Roques, R. W. Schmude, Jr., B. Sicardy, B. Tregon, M. Vanhuysse, A. Wesley, and T. Widemann 2014, Instrumental Methods for Professional and Amateur Collaborations in Planetary Astronomy, Experimental Astronomy, DOI 10.1007/s10686-014-9379-0.

[A25] Encrenaz, T., Greathouse, T.K., Richter, M.J., Lacy, J., Widemann, T., BŽzard, B., Fouchet, T., deWitt, C. and Atreya, S.K. 2013, HDO and SO2 thermal mapping on Venus. II. The SO2 spatial distribution above and within the clouds, Astron.Astrophys., Volume 559, id.A65, 9p.

[A24] Braga-Ribas, F., B. Sicardy, J. L. Ortiz, E. Lellouch, G. Tancredi, J. Lecacheux, R. Vieira-Martins, J. I. B. Camargo, M. Assafin, R. Behrend, F. Vachier, F. Colas, N. Morales, A. Maury, M. Emilio, A. Amorim, E. Unda-Sanzana, S. Roland, S. Bruzzone, L. A. Almeida, C. V. Rodrigues, C. Jacques, R. Gil-Hutton, L. Vanzi, A. C. Milone, W. Schoenell, R. Salvo, L. Almenares, E. Jehin, J. Manfroid, S. Sposetti, P. Tanga, A. Klotz, E. Frappa, P. Cacella, J. P. Colque, C. Neves, E. M. Alvarez, M. Gillon, E. Pimentel, B. Giacchini, F. Roques, T. Widemann, V. S. Magalh‹es, A. Thirouin, R. Duffard, R. Leiva, I. Toledo, J. Capeche, W. Beisker, J. Pollock, C. E. Cede–o Monta–a, K. Ivarsen, D. Reichart, J. Haislip, and A. Lacluyze 2013, The Size, Shape, Albedo, Density, and Atmospheric Limit of Transneptunian Object (50000) Quaoar from multi-chord Stellar Occultations, Astrophys. J. 773, 1, p. 26 - doi:10.1088/0004-637X/773/1/26.

 [A23] Ortiz, J.L., Sicardy, B., Braga-Ribas, F., Alvarez-Candal, A., Lellouch, E., Duffard, R., Pinilla-Alonso, N., Ivanov V.D., Littlefair, S.P., Camargo, J.I.B., Assafin M., Unda-Sanzana, E., Jehin, E., Morales, N., Tancredi, G., Gil-Hutton, R., de la Cueva, I., Colque, J.P., Da Silva Neto, D.N., Manfroid, J., Thirouin, A., GutiŽrrez, P.J., Lecacheux, J., Gillon, M., Maury, A., Colas, F., Licandro, J., Mueller, T., Jacques, C., Weaver, D., Milone, A., Salvo, R., Bruzzone, S., Organero, F., Behrend, R., Roland, S., Vieira-Martins, R., Widemann, T., Roques, F., Santos-Sanz, P., Hestroffer, D., Dhillon, V.S., Marsch, T.R., Harlingten, C., Campo Bagatin, A., Alonso, M.L., Ortiz, M., Colazo, C., Lima, H., Oliveira, A., Kerber, L.O., Smiljanic, R., Pimentel, E., Giacchini, B., Cacella, P., Emilio, M. 2012, Albedo and atmospheric constraints of dwarf planet Makemake from a stellar occultation, Nature, Volume 491, Issue 7425, pp. 566-569 (2012)

[A22] Encrenaz, T., Greathouse, T. K., Roe, H., Richter, M., Lacy, J., BŽzard, B., Fouchet, T., Widemann, T. 2012, HDO and SO2 thermal mapping on Venus: Evidence for strong SO2 variability, Astr. Astrophys. 543, A153.

[A21] Machado, P., Luz, D., Widemann, T, Lellouch, E., Witasse, O. 2012, Mapping zonal winds at Venus' cloud tops from ground-based Doppler velocimetry, Icarus 221, 248-261.

[A20] Tanga, P., Widemann, T., Sicardy, B., Pasachoff, J., Arnaud, J., Comolli, L., Rondi, A., Rondi, S., Suetterlin, P. 2011, Sunlight refraction in the mesosphere of Venus during the transit on June 8th, 2004 (2012), Icarus 218, 207-219, arXiv:1112.3136.

[A19] Tinetti G., Beaulieu J.P., Henning T., Meyer M., Micela G., Ribas I., Stam D., Swain M., Krause O., Ollivier M., Pace E., Swinyard B., Aylward A., van Boekel R., Coradini A., Encrenaz T., Snellen I., Bouwman J., Cho J. Y-K., CoudŽ du Foresto V., Guillot T., Mueller-Wodarg I., Palle E., Selsis F., Sozzetti A., Ade P.A.R., Achilleos N., Adriani A., Agnor C. B., Afonso C., Allende Prieto C., Bakos G., Barber R. J., Barlow M., Bernath P., BŽzard B., BordŽ P., Brown L.R., Cassan A., Cavarroc C., Ciaravella A., Cockell, C., Coustenis A., Danielski C., Decin L., De Kok R., Demangeon O., Deroo P., Doel P., Drossart P., Fletcher L.N., Focardi M., Forget F., Fossey S., FouquŽ P., Frith J., Galand M., Gaulme P., Gonz‡lez Hern‡ndez J.I. (IAC), Grasset O., Grassi D., Grenfell J. L., Griffin M. J., Griffith C. A., Gršzinger U., Guedel M., Guio P., Hainaut O., Hargreaves R., Hauschildt P. H., Heng K., Heyrovsky D., Hueso R., Irwin P., Kaltenegger L., Kervella P., Kipping D., Koskinen T.T., Kov‡cs G., La Barbera A., Lammer H., Lellouch E., Leto G., Lopez Morales M., Lopez Valverde M.A., Lopez-Puertas M., Lovis C., Maggio A., Maillard J.P., Maldonado Prado J., Marquette J.B., Martin-Torres F.J., Maxted P., Miller S., Molinari S., Montes D., Moro-Martin A., Moses J.I., Mousis O., Nguyen Tuong N., Nelson R., Orton G.S., Pantin E., Pascale E., Pezzuto S., Pinfield D., Poretti E., Prinja R., Prisinzano L., Rees J.M., Reiners A., Samuel B., S‡nchez-Lavega A., Sanz Forcada J., Sasselov D., Savini G., Sicardy B., Smith A., Stixrude L., Strazzulla G., Tennyson J., Tessenyi M., Vasisht G., Vinatier S., Viti S., Waldmann I., White G.J., Widemann T., Wordsworth R., Yelle R., Yung Y., Yurchenko S.N. 2012, EChO, Exoplanet characterisation observatory, Experimental Astronomy, DOI 10.1007/s10686-012-9303-4, Aug. 2012.

[A18] Ehrenreich, D., Vidal-Madjar, A., Widemann, T., Gronoff, G., Tanga, P., BarthŽlemy, M., Lilensten, J., Lecavelier des Etangs, A. and Arnold, L. 2011,Transmission spectrum of Venus as a transiting exoplanet, Astronomy & Astrophysics 527, L2, DOI: 10.1051/0004-6361/201118400, arXiv:1112.0572.

[A17] Sicardy, B., J. L. Ortiz, M. Assafin, E. Jehin, A. Maury, E. Lellouch, R. Gil Hutton, F. Braga-Ribas, F. Colas, D. Hestroffer, J. Lecacheux, F. Roques, P. Santos Sanz, T. Widemann, N. Morales, R. Duffard et al. 2011, A radius of 1163 km and an albedo of 0.96 for Eris from a stellar occultation, 2011, Nature, Vol. 478, p. 493-496, 27 October 2011.

[A16] G. Tinetti, J.Y.K. Cho, C.A. Griffith, O. Grasset, L. Grenfell, T. Guillot, T.T. Koskinen, J.I. Moses, D. Pinfield, J. Tennyson, M. Tessenyi, R. Wordsworth, A. Aylward, R. van Boekel, A. Coradini, T. Encrenaz, I. Snellen, M.R. Zapatero-Osorio, J. Bouwman, V.C. du Foresto, M. Lopez-Morales, I. Mueller-Wodarg, E. Pall ́e, F. Selsis, A. Sozzetti, J.P. Beaulieu, T. Hen- ning, M. Meyer, G. Micela, I. Ribas, D. Stam, M. Swain, O. Krause, M. Ollivier, E. Pace, B. Swinyard, P.A.R. Ade, N. Achilleos, A. Adriani, C.B. Agnor, C. Afonso, C.A. Prieto, G. Bakos, R.J. Barber, M. Barlow, P. Bernath, B. BŽzard, P. BordŽ, L.R. Brown, A. Cassan, C. Cavarroc, A. Ciaravella, C. Cockell, A. Coustenis, C. Danielski, L. Decin, R. De Kok, O. Demangeon, P. Deroo, P. Doel, P. Drossart, L.N. Fletcher, M. Focardi, F. Forget, S. Fossey, P. FouquŽ, J. Frith, M. Galand, P. Gaulme, J.I.G. Herna ́ndez, D. Grassi, M.J. Griffin, U. Gršzinger, M. Guedel, P. Guio, O. Hainaut, R. Hargreaves, P.H. Hauschildt, K. Heng, D. Heyrovsky, R. Hueso, P. Ir- win, L. Kaltenegger, P. Kervella, D. Kipping, G. Kovacs, A.L. Barbera, H. Lammer, E. Lellouch, G. Leto, M.L. Morales, M.A.L. Valverde, M. Lopez-Puertas, C. Lovi, A. Maggio, J.P. Maillard, J.M. Prado, J.B. Marquette, F.J. Martin-Torres, P. Maxted, S. Miller, S. Molinari, D. Montes, A. Moro-Martin, O. Mousis, N.N. Tuong, R. Nelson, G.S. Orton, E. Pantin, E. Pascale, S. Pezzuto, E. Poretti, R. Prinja, L. Prisinzano, J.M. Reess, A. Reiners, B. Samuel, J.S. Forcada, D. Sasselov, G. Savini, B. Sicardy, A. Smith, L. Stixrude, G. Strazzulla, G. Vasisht, S. Vinatier, S. Viti, I. Waldmann, G.J. White, T. Widemann, R. Yelle, Y. Yung, S. Yurchenko, in IAU Symposium, IAU Symposium, vol. 276, ed. by A. Sozzetti, M. G. Lattanzi, & A. P. Boss (2011), IAU Symposium, vol. 276, pp. 359–370. DOI 10.1017/S1743921311020448

[A15] Pasachoff, J.M., G. Schneider, and T. Widemann 2011, High-Resolution Satellite Imaging of the 2004 Transit of Venus and Asymmetries In the Cytherean Atmosphere, Astronomical Journal, 141, 112.

[A14] Sicardy, B., Bolt, G., Frappa, E., Lecacheux, J., Peyrot, A., Teng-Chuen-Yu, J.-P., Beisker, W., Boissel, Y., Buckley, D., Colas, F., de Witt, C., Doressoundiram, A., Roques, F., Widemann, T., Gruhn, C., Batista, V., Biggs, J., Dieters, S., Greenhill, J., Groom, R., Herald, D., Lade, B., Mathers, S., Assafin, M., Camargo, J.I.B., Vieira Martins, R., Andrei, A. H., da Silva Neto, D.N., Brago-Ribas, F., Behrend, R. 2010, Constraints on Charon's orbital elements from the double stellar occultation of 2008 June 22, The Astronomical Journal, Volume 141, Issue 2, article id. 67 (2011). DOI:10.1088/0004-6256/141/2/67.

 

Avant/Before 2011

[A13] Roques, F., Boissel, Y., Doressoundiram, A., Sicardy, B., and Widemann, T. 2009, Exploration of the Outer Solar System by Stellar Occultations, Earth, Moon, and Planets, 105, 201-208. Download pdf

[A12] Widemann, T., B. Sicardy, R. Dusser, C. Martinez, W. Beisker, E. Bredner, D. Dunham, P. Maley, E. Lellouch, J.-E. Arlot, J. Berthier, F. Colas, W.B. Hubbard, R. Hill, J. Lecacheux, J.-F. Lecampion, S. Pau, M. Rapaport, F. Roques, W. Thuillot, et al. 2009, Titania's Radius and an Upper Limit on its Atmosphere from the September 8, 2001 Stellar Occultation, Icarus 199, Vol. 2, pp. 458-476. Download pdf

[A11] Widemann, T., Lellouch, E., Donati, J.-F., 2008, Venus Doppler winds at Cloud Tops Observed with ESPaDOnS at CFHT, Planetary and Space Science, Special issue on Ground-based measurements in support of Venus Express, 56, 1320-1334. Download pdf

[A10] Gaulme, P., Schmieder, F.-X., Grec, C., Ariste, A. L., Widemann, T., and Gelly, B. 2008, Venus wind map at cloud top level with the MTR/Themis visible spectrometer, I – Instrumental performance and first results, Planetary and Space Science, Special issue on Ground-based measurements in support of Venus Express, 56, 1335-1343. Download pdf

[A9] Widemann, T., Lellouch, E., and Campargue, A. 2007, New Wind Measurements in VenusÕ Lower Mesosphere From Visible Spectroscopy, Planetary and Space Science, Special Venus issue Vol. 2, 55, 1741-1756. Download pdf

[A8] Sicardy, B., Colas, F., Widemann, T., Beisker, W., Kretlow, M., Ferri, F., Lacour, S., Lecacheux, J., Lellouch, E., Pau, S., Renner, S., Roques, F., Fienga, A., et al. 2006, The two Titan stellar occultations of 14 November 2003, J. Geophys. Res., Vol. 111, E11S91. Download pdf

[A7] Sicardy, B., Bellucci, A., Gendron, E., Lacombe, F., Lacour, S., Lecacheux, J., Lellouch, E., Renner, S., Pau, S., Roques, F., Widemann, T., Colas, F., et al. 2006, Charon : Size and Constraints on the Atmosphere From a Stellar Occultation, Nature, vol. 439, 52-54, 5 January 2006.

[A6] Sicardy, B., Widemann, T., Lellouch, E., Veillet, C., Cuillandre, J.-C et al. 2003, Large Changes In PlutoÕs Atmosphere As Revealed By Recent Stellar Occultations,  Nature, vol. 424, 168-170, 10 July 2003. Download pdf

[A5] Raynaud, E., Drossart, P., Matcheva, K., Sicardy, B., Hubbard, W. B., Roques, F., Widemann, T., Gladstone, G. R., Waite,  J. H., Nadeau, D., Bastien, P., Doyon, R., Hill, R., Rieke, M. J., And Marley, M. 2003, The 10 October 1999 HIP 9369 Occultation by The Northern Polar Region of Jupiter: Ingress and Egress Lightcurves Analysis, Icarus, 162, 2, 344-361.

[A4] Fegley, B., Klingelhofer, G., Lodders, K., Widemann, T. 1997, Geochemistry of Surface-Atmosphere Interactions on Venus, Venus II, S.W. Bougher, D.M. Hunten, & R.J. Phillips Eds., University of Arizona Press, Tucson, pp. 591-636.

[A3] Bertaux, J.L., Widemann, T., Hauchecorne, A., Moroz, V.I., Ekonomov, A.P. 1996, Vega-1 and Vega-2 Entry Probes: an Investigation of Local UV Absorption (220 - 400 nm) In The Atmosphere of Venus (SO2, Aerosols, Cloud Structure), Journ. Geophys. Research, Vol. 101, N¡E5, pp. 12709-12745.

[A2] Widemann, T., Bertaux, J.L., Querci, F., Querci, M. 1994, High Resolution Spectroscopy of Stars Through Telluric Water Vapor Absorption Band Near 936 nm, I.- Methodology and First Results, Astron. Astrophys. 282, 879.

[A1] Bertaux, J. L., Megie, G., Widemann, T., Chassefire, E., Pellinen, R., Kyrola, E., Korpela, S., and Simon, P. 1991, Monitoring of ozone trend by stellar occultations: The Gomos instrument. Adv. Space Res., 11(3) :237-242.

 

 

2011-2016

ConfŽrences internationales invitŽes avec publications des actes

Invited international conferences with published acts/abstracts

[I9] Widemann, T., Tanga, P., Vandaele, A.C. 2013, Mesospheric temperature at terminator using SDO/HMI aureole photometry and comparison with Venus Express, C1.1 Atmospheres and ices on terrestrial planets, Davos Atmosphere and Cryosphere Assembly DACA-13, Davos, Switzerland, July 8-12, 2013

[I8] Widemann, T., Understanding Venus to understand the Earth, U43A. Cross-Fertilization Between Environmental Science and Planetary Exploration, AGU Fall Meeting Final ID: U43A-04, San Francisco, 3-7 December 2012.

[I7] Widemann, T., Y. Takahashi, S. Ohtsuki, M. Sornig, B. Sandor, E. Young, C. Tsang, T. Slanger, S. Limaye 2011, Ground-based observations of the mesosphere and lower thermosphere : coordinated campaigns with Venus Express, JpGU International Symposium 2011, Chiba-city, Japan, 22-27 May 2011.

[I6] Widemann, T., Ground-based observational constraints on the mesosphere and lower thermosphere : coordinated campaigns with Venus Express  EGU/ 6th European Geophysical Union General Assembly, Vienna, 3-8 April 2011, Geophysical Research Abstracts Vol. 13, EGU2012-A.

 

 

2011-2016

ConfŽrences internationales avec publication des rŽsumŽs

Contributed communications in international conferences with published abstracts

 

2016

 

[C111] Joern Helbert, Emmanuel Marcq, T. Widemann, Nils Mueller, David Kappel, Constantine
Tsang, Alessandro Maturilli, Sabrina Ferrari, Mario
D'Amore, Melinda Dyar, Suzanne Smrekar 2016,  The Venus Emissivity Mapper, DPS #48-EPSC #11 joint meeting, 16-21 October 2016, Pasadena, CA.

[C110] Richard Ghail, Colin F Wilson, T. Widemann 2016, EnVision M5 Venus Orbiter Proposal: Opportunities and Challenges, DPS #48-EPSC #11 joint meeting, 16-21 October 2016, Pasadena, CA, abstract 216.08

[C109] Paolo Tanga, T. Widemann, Christophe
Pere, Brice A. Babcock, Jerome Berthier, Jay M.
Pasachoff, Maarten Roos-Serote 2016, The thermal field of the terminator mesosphere of Venus using solar transit data, DPS #48-EPSC #11 joint meeting, 16-21 October 2016, Pasadena, CA, abstract 115.09

[C108] Widemann, T., Machado, P., Peralta, J., Marcq, E., Helbert, J., Smrekar, S. 2016, Meridional transport in the Venusian atmosphere, DPS #48-EPSC #11 joint meeting, 16-21 October 2016, Pasadena, CA, abstract 115.07

[C107] Arianna Piccialli, Raphael Moreno, Therese A. Encrenaz, Thierry Fouchet, Emmanuel Lellouch, Arielle
Moullet, T. Widemann, Monitoring the thermal structure and minor species of Venus mesosphere with ALMA submm observations, DPS #48-EPSC #11 joint meeting, 16-21 October 2016, Pasadena, CA, abstract 216.20

[C106] Pedro Machado, Javier Peralta, David Luz, Ruben Gonalves, T. Widemann, Joana Oliveira 2016, Venus' night side atmospheric dynamics using near infrared observations from VEx/VIRTIS and TNG/NICS, DPS #48-EPSC #11 joint meeting, 16-21 October 2016, Pasadena, CA, abstract 115.06

[C105] Marcq, E., Nils Mueller, Constantine Tsang, David Kappel, T. Widemann, Joern Helbert, Suzanne Smrekar, Atmospheric Science with VEM on board Veritas
, DPS #48-EPSC #11 joint meeting, 16-21 October 2016, Pasadena, CA.

[C104] T. Encrenaz, LESIA, Paris Observatory, France (therese.encrenaz@obspm.fr), T. K. Greathouse, SwRI, San Antonio, TX, USA, M.J. Richter & C. DeWitt (University of California Davis, CA, USA), T. Widemann, B. BŽzard & T. Fouchet (LESIA, Paris Observatory, France), S. K. Atreya, U. of Michigan, Ann Arbor, MI, USA, H. Sagawa, Kyoto Sangyo Univ., Japan 2016,  Variability of SO2 and HDO and thermal structure in the lower mesosphere of Venus from infrared spectroscopy, International Venus Conference 2016, Oxford, UK, 4-8 April 2016.

 [C103] R. C. Ghail, Department of Civil and Environmental Engineering, Imperial College London, London, SW15 3HA, UK, (r.ghail@imperial.ac.uk), C. F. Wilson, Department of Atmospheric, Oceanic and Planetary Physics, Oxford University, Oxford, OX1 3PU, UK, (Colin.Wilson@physics.ox.ac.uk), T. Widemann, Observatoire de Paris – LESIA UMR CNRS 8109, 92190 Meudon, France, and UniversitŽ Versailles St-Quentin - DYPAC EA 2449, France, (thomas.widemann@obspm.fr), EnVision M5 Venus Orbiter Proposal: Opportunities and Challenges, International Venus Conference 2016, Oxford, UK, 4-8 April 2016.

[C102] J. Helbert, D. Wendler, I. Walter, T. Widemann, E. Marcq, A. Maturilli, S. Ferrari, M. DÕAmore, N. MŸller, M. D. Dyar, and S. Smrekar, Institute for Planetary Research, DLR, Rutherfordstrasse 2, 12489 Berlin, Germany (joern.helbert@dlr.de), the Venus Emissivity Mapper (VEM) Concept, International Venus Conference 2016, Oxford, UK, 4-8 April 2016.

[C101] S.S. Limaye, M. PŠtzold, S. Bougher, S. Bruinsma, S. Chamberlain, R.T. Clancy, J.-C. GŽrard, G. Gilli, D. Grassi, R. Haus, M. Herrmann, T. Imamura, E. Kohler, P. Krause, S. Lebonnois, A. Mahieux, A. Migliorini, F. Montmessin, C. Pere, M. Persson, A. Piccialli, M. Rengel, A. Rodin, Manuela Sornig, H. Svedhem, S. Tellmann, P. Tanga, A.C. Vandaele, T. Widemann, C. Wilson, I. MŸller-Wodarg, L. Zasova 2016, The structure of the Venus atmosphere: intercomparison of Venus Express and ground based observations of vertical temperature and density profiles, International Venus Conference 2016, Oxford, UK, 4-8 April 2016.

[C100] P. Machado, T. Widemann, J. Peralta, R. Gonalves, J.-F. Donati and D. Luz, Institute of Astrophysics and Space Sciences, Observat—rio Astron—mico de Lisboa, Ed. Leste, Tapada da Ajuda, 1349-018 Lisboa, Portugal (machado@oal.ul.pt) 2016, Ground and space based cloud-top wind velocities using CFHT/ESPaDOnS (Doppler velocimetry) and VEx/VIRTIS (cloud tracking) coordinated measurements, International Venus Conference 2016, Oxford, UK, 4-8 April 2016.

[C99] A. Piccialli, R. Moreno, T. Encrenaz, T. Fouchet, E. Lellouch, A. Moullet, T. Widemann 2016, Mapping the thermal structure and minor species of Venus mesosphere with ALMA, International Venus Conference 2016, Oxford, UK, 4-8 April 2016.

[C98] P. Tanga, Th. Widemann, Ch. Pere, M. Roos-Serote 2016, Venus mesosphere at the terminator, studied during the solar transits, International Venus Conference 2016, Oxford, UK, 4-8 April 2016.

[C97] Th. Widemann, C. Wilson, T. Imamura, E. Lellouch, H. Svedhem, M. Nakamura, the EuroVenus consortium 2016, International ground-based support to Venus Express and Akatsuki missions, 2007-2017, International Venus Conference 2016, Oxford, UK, 4-8 April 2016.

[C96] Helbert, J.; Wendler, D.; Walter, I.; Widemann, T.; Marcq, E.; Maturilli, A.; Ferrari, S.; D'Amore, M.; MŸller, N.; Dyar, M. D.; Smrekar, S. 2016, The Venus Emissivity Mapper (VEM) Concept, 47th Lunar and Planetary Science Conference, March 21-25 2016, The Woodlands, TX.

[C95] Ghail, R. C.; Wilson, C. F.; Widemann, T. 2016,  EnVision M5 Venus Orbiter Proposal: Opportunities and Challenges, 47th Lunar and Planetary Science Conference, March 21-25 2016, The Woodlands, TX.

 

2015

[C94] Piccialli, A., Moreno, R., Encrenaz, T., Fouchet, T., Lellouch, E., Moullet, A., Widemann, T. 2015,Thermal Structure and Minor Species Distribution of Venus Mesosphere by ALMA sub-millimeter Observations, American Astronomical Society, DPS meeting #47, National Harbor, MD,  Nov. 8-13 2015, #201.03.

[C93] Dias-Oliveira, Alex; Sicardy, Bruno; Lellouch, Emmanuel; Vieira-Martins, Roberto; Assafin, Marcelo; Ign‡cio Bueno Camargo, Jœlio; Braga-Ribas, Felipe; Gomes-
Jœnior, Altair; Bendetti-Rossi, Gustavo; Colas, Franois; Decock, Alice; Doressoundiram, Alain; Dumas, Christophe; Em’lio, Marcelo; Fabrega Polleri, Joaquin; Gil-Hutton, Ricardo; Gillon, Michael; Girard, Julien; Hau, George; Ivanov, Valentin; Jehin, Emmanuel; Lecacheux, Jean; Leiva, Rodrigo; Lopez-Sisterna, Cec’lia; Mancini, Luigi; Manfroid, Jean; Maury, Alain; Meza, Erick; Morales, Nicolas; Nagy, Leslie; Opitom, Cyrielle; Ortiz, JosŽ Luiz; Pollock, Joe; Roques, Franoise; Snodgrass, Colin; Franois Soulier, Jean; Thirouin, Audrey; Vanzi, Leonardo; Widemann, T.; Reichart, Daniel; LaCluyze, Aaron; Haislip, Joshua B.; Ivarsen, Kevin; Dominik, Martin; J¿rgensen, Uffe; Skottfelt, Jesper 2015, American Astronomical Society, DPS meeting #47, National Harbor, MD,  Nov. 8-13 2015, id.200.09

[C92] Limaye, S. S.; Bougher, S.; Chamberlain, S.; Clancy, R. T.; Gilli, G.; Grassi, D.; Haus, R.; Herrmann, M.; Imamura, T.; Kohler, E.; Krause, P.; Lebonnois, S.; Mahieux, A.; Sandor, A.; Sornig, M.; Svedhem, H.; Tellmann, S.; Vandaele, A. C.; Widemann, T.; Wilson, C.; Mueller-Wodarg, I.; Zasova, L. 2015, Improved Knowlegde of Venus Atmospheric Structure, European Planetary Science Congress 2015, held 27 September - 2 October, 2015 in Nantes, France, id.EPSC2015-758.

[C91] Pre, C.; Tanga, P.; Widemann, T.; Mahieux, A.; Wilquet, V.; Vandaele, A. C. 2015, The vertical density profile of the mesosphere of Venus by independent measurements from SPICAV/SOIR and aureole photometry, European Planetary Science Congress 2015, held 27 September - 2 October, 2015 in Nantes, France, id.EPSC2015-692.

[C90] Machado, P.; Widemann, T.; Peralta, J.; Luz, D. 2015, Ground and space based cloud-top wind velocities using CFHT/ESPaDOnS (Doppler velocimetry) and VEx/VIRTIS (cloud tracking) coordinated measurements, European Planetary Science Congress 2015, held 27 September - 2 October, 2015 in Nantes, France, id.EPSC2015-666.

[C89] Piccialli, A.; Moreno, R.; Encrenaz, T.; Fouchet, T.; Lellouch, E.; Moullet, A.; Widemann, T. 2015, Thermal structure and minor species of Venus mesosphere by ALMA submm ground-based observations, European Planetary Science Congress 2015, held 27 September - 2 October, 2015 in Nantes, France, id.EPSC2015-586.

[C88] Encrenaz, T.; Greathouse, T.; Richter, M.; DeWitt, C.; Lacy, J.; Widemann, T.; BŽzard, B.; Fouchet, T.; Atreya, S.; Sagawa, H. 2015, Variability of SO2 and HDO at the cloudtop of Venus from high-resolution infrared spectroscopy, European Planetary Science Congress 2015, held 27 September - 2 October, 2015 in Nantes, France, id.EPSC2015-113.

[C87] Ross, F., Lee, G., Polidan, R., Sokol, D., Miller, J., Samuele, R., Barnes, N., Bolisay, L., Michi, Y., Limaye, S., Widemann, T., VAMP Science Instrument Accomodations and Performance Capabilities, 11th Low Cost Planetary Missions Conference, June 9-11 2015, Berlin, Germany.

[C86] Encrenaz, T., Greathouse, T.K., Richter, M.J., Lacy, J.H., Widemann, T., BŽzard, B., deWitt, C., Atreya, S.K., Imaging spectroscopy of Venus in the thermal infrared : daily variations of the thermal structure, EGU General Assembly 2015, April, 2015 in Vienna, Austria.

 

2014

[C85] Widemann, T., Jaeggli, S., Reardon, K., Tanga, P., Pre, C., Pasachoff, J.M., Vandaele, A.-C., Wilquet, V., Mahieux, A., Wilson, C., Venus' thermospheric temperature field using a refraction model at terminator : comparison with 2012 transit observations using SDO/HMI, VEx/SPICAV/SOIR and NSO/DST/FIRS, American Astronomical Society, DPS meeting #44, held in Tucson, AZ Oct. 14-19 2014, #508.08.

[C84] Cutts, J. A.,, Ocampo, A., Limaye, S., Glaze, L., Svedhem, H., Nakamura, M., Zasova, L.,  Wilson, C., and Widemann, T. 2014, International Collaboration for Venus Exploration, International Coordination of Planning for Space Exploration, 40th COSPAR Scientific Assembly, Moscow, 3-9 August 2014.

[C83] Cutts J. A., Widemann T. Limaye S. Baines K. H. Wilson C. F. Voss P. Hall J. L.
Nott J. Kerzhanovich V. 2014, Exploration Targets in the Venus Cloud Regions #6015 - Poster session : Within the Atmosphere. Workshop on Venus Exploration Targets, V. Sharpton, L. Esposito, C. Sotin conv., Lunar and Planetary Institute, 3600 Bay Area Boulevard, Houston TX 77058.

[C82] Limaye S. S. Glaze L. S. Cutts J. A. Wilson C. F. Parish H. F. Schubert G. Baines K. H.
Covey C. C. Widemann T. 2014, Exploration Targets in the Lower Atmosphere of Venus #6021 - Poster session : Within the Atmosphere. Workshop on Venus Exploration Targets, V. Sharpton, L. Esposito, C. Sotin conv., Lunar and Planetary Institute, 3600 Bay Area Boulevard, Houston TX 77058.

[C81] Widemann T. Wilquet V. McGouldrick K. MŠŠttŠnen A. Cutts J. Wilson C. Jessup K. L. Limaye S. Polidan R. Griffin K. the EuroVenus consortium , 2014, VenusÕ Robotic Exploration at Upper Cloud Level: A US-European Perspective #6029 - Poster session : Within the Atmosphere. Workshop on Venus Exploration Targets, V. Sharpton, L. Esposito, C. Sotin conv., Lunar and Planetary Institute, 3600 Bay Area Boulevard, Houston TX 77058.

[C80] Angelo Pio Rossi, Baptiste Cecconi, Markus Fraenz, Axel Hagermann, David Heather, Pascal Rosenblatt, Hakan Svedhem, and Thomas Widemann 2014, The ESA Planetary Science Archive User Group (PSA-UG), Geophysical Research Abstracts Vol. 16, EGU2014-5102, EGU General Assembly 2014, © Author(s) 2014.

[C79] Emmanuel Marcq, ThŽrse Encrenaz, Emmanuel Lellouch, Jean-Loup Bertaux, Thomas Widemann, and Mirel Birlan 2014, Measurements of carbon monoxide above Venus' cloud top from IRTF/CSHELL observations, Geophysical Research Abstracts
Vol. 16, EGU2014-6599, 
EGU General Assembly 2014 
© Author(s) 2014.

[C78] Widemann, T.,  MŠŠttŠnen, A., Wilquet, V.,  McGouldrick, K.,  Jessup, Kandis Lea, Wilson, C.,  Limaye, S., and the EuroVenus consortium 2014, Dynamics and chemistry of VenusÕ large and complex cloud system : a science case for an in-situ long-term chemical laboratory, Geophysical Research Abstracts
Vol. 16, EGU2014-9273-1, 2014
 EGU General Assembly 2014
 © Author(s) 2014.

[C77] Limaye, S.,  Ashish, K., Alam, M., Landis, G., Widemann, T., Kremic, T. 2014, Sampling the Cloudtop Region on Venus, Geophysical Research Abstracts Vol. 16, EGU2014-8720-6, 2014, EGU General Assembly 2014, © Author(s) 2014.

[C76] Widemann, T.,  Tanga P., Pre, C.,  Jaeggli, S., Reardon, K., and Pasachoff, J. M. 2014, VenusÕ thermospheric temperature field using a refraction model at terminator : comparison with 2012 transit observations using SDO/HMI and NSO/DST/FIRS, Geophysical Research Abstracts
Vol. 16, EGU2014-12916, 2014
 EGU General Assembly 2014
 © Author(s) 2014.

[C75] T. Widemann, K. Griffin, A. MŠŠttŠnen, V. Wilquet, K. McGouldrick, K.L Jessup, C. Wilson, R. Polidan, D. Sokol, G. Lee, L. Bolisay, N. Barnes, S. Limaye, the EuroVenus consortium, Venus' robotic exploration at cloud level : a US-European perspective, International Academy of Astronautics Space Exploration Conference, pre-Summit Conference on Planetary Robotic and Human Spaceflight Exploration, January 09, 2014, Washington DC, USA

[C74] Limaye, S., L. Zasova, C. Wilson, R.C. Ghail, A.C. Vandaele, W. J. Markiewicz, T. Widemann, T. Imamura, F. Montmessin, E. Marcq, James A. Cutts 2014, Planetary Robotic Exploration and Opportunities for International Collaboration on Climate Change:  A Comparative Climatology Case Study, International Academy of Astronautics Space Exploration Conference, pre-Summit Conference on Planetary Robotic and Human Spaceflight Exploration, January 09, 2014, Washington DC, USA

 

2013

[C73] Widemann, T, Pasachoff, J.M., Vandaele, A.C., Wilquet, V., Mahieux, A., Wilson, C., Venus' thermospheric temperature field using a refraction model at terminator : American Astronomical Society, DPS meeting #43, held in Denver, CO Oct. 14-19 2014, #508.08.

[C72] Jaeggli, S., Reardon, K.P., Pasachoff, J.M., Schneider, G., Widemann, T., Tanga, P. 2013, 1565 nm Observations of the Transit of Venus, Proxy for a Transiting Exoplanet, American Astronomical Society /  44th Meeting of the Solar Physics Division (SPD),  Bozeman, Montana 8-11 July 2013.

[C71] Widemann, T., Tanga, P., Vandaele, A.C., Wilquet, V., Mahieux, A. 2013, Mesospheric temperature at terminator using SDO/HMI aureole photometry and comparison with Venus Express, EGU General Assembly 2013, held 7-12 April, 2013 in Vienna, Austria, id. EGU2013-5690.

[C70] Marcq, E., Encrenaz, T., Widemann, T. Lellouch, E., Fouchet, T. 2013, Ground-based C-SHELL/IRTF observations of Venus near 4.53μm, EGU General Assembly 2013, held 7-12 April, 2013 in Vienna, Austria, id. EGU2013-5295.

[C69] Encrenaz, T., Greathouse, T.,  Richter, M.,  Lacy, J., BŽzard, B. Fouchet, T., DeWitt, C. and Widemann, T. 2013, Mapping of SO2 on Venus within the H2SO4 cloud using ground-based infrared imaging spectroscopy, EGU General Assembly 2013, held 7-12 April, 2013 in Vienna, Austria, id. EGU2013-3967.

[C68] Machado, P., T. Widemann, D. Luz, J. Peralta 2013, Venus winds with ground-based Doppler velocimetry and comparison with coordinated cloud tracking method winds, 44th Lunar and Planetary Science Conference, held March 18-22, 2013 in The Woodlands, Texas. LPI Contribution No. 1719, p.1975.

[C67] Edelman, E., Pasachoff, J.M., Schneider, G., Babcock, B.A., Lu, M., Reardon, K., Widemann, T., Tanga, P., Dantowitz, R. 2013, The 2012 Transit of Venus: A Closer Look at the Cytherean Aureole, American Astronomical Society, AAS Meeting #221, #353.04.

 

2012

[C66] Pasachoff, J.M., Schneider, G., Babcock, B.A., Lu, M., Edelman, E., Reardon, K., Widemann, T., Tanga, P., Dantowitz, R., Silverstone, M.D., Ehrenreich, D., Vidal-Madjar, A., Nicholson, P.D., Willson, R.C., Kopp, G.A., Yurchyshyn, V.B., Sterling, A.C., Scherrer, P.H., Schou, J., Golub, L., McCauley, P., Reeves, K. 2013, Three 2012 Transits of Venus: From Earth, Jupiter, and Saturn, American Astronomical Society, AAS Meeting #221, #315.06.

[C65] Widemann, Thomas; Tanga, P.; Reardon, K. P.; Limaye, S.; Wilson, C.; Vandaele, A.; Wilquet, V.; Mahieux, A.; Robert, S.; Pasachoff, J. M.; Schneider, G., Asymmetry in the Polar Mesosphere Revealed by the 2012 Venus Transit Aureole, American Astronomical Society, DPS meeting #44, Reno, NV Oct. 14-19 2012, #508.08.

[C64] Tanga, Paolo; Widemann, T.; Ambastha, A.; Babcock, B. A.; Berthier, J.; Bouley, S.; Braga-Ribas, F.; Brasch, K.; Burke, W.; Colas, F.; and 15 coauthors, The Venus Twilight Experiment: Probing The Mesosphere in 2004 And 2012, American Astronomical Society, DPS meeting #44, Reno, NV Oct. 14-19 2012, #508.07.

[C63] Pasachoff, Jay M.; Schneider, G.; Babcock, B. A.; Lu, M.; Reardon, K. P.; Widemann, T.; Tanga, P.; Dantowitz, R.; Willson, R.; Kopp, G.; and 6 coauthors, The 2012 Transit of Venus for Cytherean Atmospheric Studies and as an Exoplanet Analog, American Astronomical Society, DPS meeting #44, Reno, NV Oct. 14-19 2012, #508.06.

[C62] Braga Ribas, Felipe; Sicardy, B.; Ortiz, J. L.; Duffard, R.; Camargo, J. I. B.; Lecacheux, J.; Colas, F.; Vachier, F.; Tanga, P.; Sposetti, S.; and 25 coauthors, Stellar Occultations by Large TNOs on 2012: The February 3rd by (208996) 2003 AZ84, and the February 17th by (50000) Quaoar, American Astronomical Society, DPS meeting #44, Reno, NV Oct. 14-19 2012, #402.01.

[C61] Sicardy, Bruno; Braga-Ribas, F.; Widemann, T.; Jehin, E.; Gillon, M.; Manfroid, J.; Ortiz, J. L.; Morales, N.; Maury, A.; Assafin, M.; and 25 coauthors, Charon's Size And Orbit From Double Stellar Occultations, American Astronomical Society, DPS meeting #44, Reno, NV Oct. 14-19 2012, #304.01.

[C60] P. Machado, T. Widemann, D. Luz, J. Peralta, and S. Chamberlain, 2012, Observation of Dynamical Tracers in the Venus Atmosphere, Comparative Climatology of Terrestrial Planets, held June 25–28, 2012, in Boulder, Colorado. LPI Contribution No. 1675, id.8021.

[C59] P. Machado, T. Widemann, D. Luz, J. Peralta, and D. L. Berry 2012, New measurements of Venus winds with ground-based Doppler velocimetry at CFH, EGU/7th European Geophysical Union General Assembly, Vienna, 23-28 April 2012, Geophysical Research Abstracts Vol. 14, EGU2012-10438.

[C58] T. Encrenaz, T. K. Greathouse, H. Roe, J. H. Lacy, M. J. Richter, B. BŽzard, T. Fouchet,and T. Widemann 2012, Mapping of SO2 and HDO on Venus using thermal infrared imaging spectroscopy, EGU/7th European Geophysical Union General Assembly, Vienna, 23-28 April 2012, Geophysical Research Abstracts Vol. 14, EGU2012-5867.

 

 

2011

[C57] P. Tanga, Th. Widemann, and B. Sicardy 2011, The aureole of Venus: light refraction in the mesosphere during the solar transit of June 6, 2004, American Astronomical Society, DPS meeting #43 and 6th European Planetary Science Congress, Nantes, France, 2-7 October, 2011, EPSC-DPS Abstracts, Vol. 6, EPCS-DPS2011-1032.

[C56] P. Machado, D. Luz, and T. Widemann 2011, Characterization of Venus' cloud top dynamics using ground-based Doppler velocimetry, American Astronomical Society, DPS meeting #43 and 6th European Planetary Science Congress, Nantes, France, 2-7 October, 2011, EPSC-DPS Abstracts, Vol. 6, EPCS-DPS2011-517.

[C55] M. W. Buie, D. J. Tholen, L. H. Wasserman, B. Sicardy, L. A. Young, E. F. Young, W. Ryan, E. Ryan, K. Walsh, T. Widemann, F. Vachier, W. Beisker, T. Hall, J. Dire, C. K. Erickson, C. Nance, and M. Person 2011, Hydra stellar occultation of 2011 June 27, American Astronomical Society, DPS meeting #43 and 6th European Planetary Science Congress, Nantes, France, 2-7 October, 2011, EPSC-DPS Abstracts, Vol. 6, EPCS-DPS2011-1715.

[C54] B. Sicardy, J. L. Ortiz, M. Assafin, E. Jehin, A. Maury, E. Lellouch, R. Gil-Hutton, F. Braga-Ribas, F. Colas, J. Lecacheux, F. Roques, P. Santo Sanz, T. Widemann, N. Morales, A. Thirouin, J.I.B. Camargo, R. Vieira-Martins, M. Gillon, J. Manfroid, R. Behrend and the Eris occultation Team, 2011, Size, density, albedo and atmosphere limit of dwarf planet Eris from a stellar occultation, American Astronomical Society, DPS meeting #43 and 6th European Planetary Science Congress, Nantes, France, 2-7 October, 2011, EPSC-DPS Abstracts, Vol. 6, EPCS-DPS2011-137.

[C53] Machado, P., T. Widemann, D. Luz 2011, Characterization of VenusÕ atmospheric dynamics with ground-based Doppler velocimetry, JpGU International Symposium 2011, Chiba-city, Japan, 22-27 May 2011.

[C52] Wilson C.F., H. Svedhem, D.V. Titov, R. Hoofs, T. Widemann 2011, Venus Express science operations and co-ordinated observation planning,  JpGU International Symposium 2011, Chiba-city, Japan, 22-27 May 2011.

[C51] Young, E., Bullock, M., Tsang, C., Hall, D., Widemann, T., Wilson, C. 2011, A Balloon-Borne Mission to Observe Venus During the January 2014 Inferior Conjunction, The 20th ESA Symposium on European Rocket and Balloon Programmes and Related Research, Hyres, France, 22-26 May 2011.

[C50] Encrenaz, T., T. K. Greathouse, M. Richter, B. BŽzard, T. Fouchet, E. Marcq, T. Widemann, S. K. Atreya 2011, The synthetic spectrum of Venus in the 7-micron region, EGU/ 6th European Geophysical Union General Assembly, Vienna, 3-8 April 2011, Geophysical Research Abstracts Vol. 13, EGU2012.