Observatoire de Paris - Thomas Widemann

Laboratoire d’Études Spatiales et d’Instrumentation en Astrophysique (LESIA)

UMR 8109, bât. 10, F – 92190 Meudon cedex, France

e-mail: thomas.widemann@obspm.fr

phone: + 33 (0) 1 45 07 77 38

fax: + 33 (0) 1 45 07 71 10

PRESENT POSITION (Sep. 2009) :

Astronomer, Paris Observatory, France

Associate Professor of Astrophysics, Versailles University, France

Habilité à diriger des recherches (HDR), qualifié Professeur des universités

ASTEROID (20606) WIDEMANN

Orbital elements – Current position

AREA OF SCIENTIFIC ACTIVITY

I am expert in the study of planetary atmospheres in the UV, visible and near infrared range. I have first based my investigations on space-borne, in-situ experiment (ISAV data on board VEGA) to measure SO₂ in the nightside lower atmosphere of Venus, and constrain the volcanism and the nature of UV absorption at cloud top level on that planet. In recent years I initiated a multi-annual program to study wind regimes in the Venus mesosphere and their variability. I am also expert in the prediction, observation, and data analysis of stellar occultations by distant icy bodies of the solar system, to constrain the size, shape, density, thermal profile, ice condensation - sublimation cycles and the formation of seasonal / perihelion atmospheres above their surface.

I have more specifically developed monitoring and interpretation techniques of winds measurements in the mesosphere of Venus in support of ESA's Venus Express mission and the coming JAXA's Venus Climate Orbiter mission, and coordinated support campaigns worldwide. In recent papers I demonstrated that probing the Doppler velocities of solar and CO2 lines allows to retrieve the vertical gradient of zonal winds in the first two scale heights above cloud tops, and their variability with time, thus constraining the forcing and dissipation mechanisms of the four-day wave in the Gierasch-Rossow theory. I am Principal Investigator of a PHC/SAKURA-Japan Hubert-Curien partnership for the coordination of space and ground-based observations of Venus, co-investigator of the European Venus Explorer (EVE) proposal in response to ESA’s Cosmic Vision 2015-2025, and also co-investigator of ANR program “Beyond Neptune”, a partnership of Observatoire de Paris-LESIA and National Tsing Hua University, Taiwan.

Through teaching graduate and undergraduate students at Versailles university and Paris Observatory, as well as outreach conferences, I have developed a strong interest in History of Astronomy. I co-chair an investigation program at Centre de recherches du château de Versailles (CRCV) on early modern science practices at the court of Versailles in the 17th and 18th centuries, in preparation for a major exhibition to open Nov. 26, 2010. I also co-chair a seminar on the role of cultural representations in scientific discoveries in Paris Observatory.

SCIENTIFIC RESPONSABILITIES

Principal Investigator, Hubert-Curien partnership SAKURA-Japan "Coordination d'observations spatiales et sol de l'atmosphère de Vénus", 2010 - present

Member of the Venus Express Science Working Team (SWT) in the frame of the ESA Venus Express mission, 2008 - present

Support Investigator of ESA Venus Express mission on “Ground-based observations of Venus’ mesosphere”, 2007 - present

Co-investigator of ANR program “Beyond Neptune”, Observatoire de Paris-LESIA and National Tsing Hua University, Taiwan, 2009 - present

Co-Investigator, European Venus Explorer (EVE) in-situ mission to Venus, ESA Cosmic Vision

Program co-chair, “The Prince and the Scientist in Modern European Courts, XVIIth – XVIIIth Centuries”, Centre de recherche du Château de Versailles et Observatoire de Paris, 2007 - present

EXPERTISE

Member of Science Council of Campus Spatial, Paris-Diderot University, 2010 - present

Member of Working Group on Education and Outreach for the Europa and Jupiter System Mission EJSM/WG9, 2009 - present

Expert for South Africa’s National Research Foundation (NRF), 2009 - present

Member of preparation committee of European program FP7/JRA-1, 2008-2009

Member of Comité de sélection (professor recruitment) at Versailles university

Member of Comité des travaux historiques et scientifiques, French Ministry of Research and École nationale des Chartes

Editorial review for Planetary and Space Science, Earth Moon and Planets, History of Universities (Oxford University Press, USA)

STELLAR OCCULTATIONS BY DISTANT ICY BODIES OF THE SOLAR SYSTEM

DYNAMICAL PROPERTIES AND VARIABILITY OF VENUS’ ATMOSPHERE

EARLY MODERN ASTRONOMY

Upper Limits for a Titania’s Atmosphere and for a Large Trans-Neptunian Object’s Atmosphere from Stellar Occultations (Widemann et al. 2009, Icarus 199, 458).

Dynamical structure of Venus' Middle Atmosphere constrained by Direct Wind Measurements in the Visible

(Widemann et al. 2008, PSS 56, 1320 ; Widemann et al. 2007, PSS 55, 1741).

The Prince and the Scientist in Modern European Courts, XVIIth – XVIIIth Centuries, Centre de recherche du château de Versailles, Observatoire de Paris 2007-2011

Quaoar, May 1 2009

prediction / observation

Nix, June 5 2009

prediction / observation

First science workshop in Paris Observatory, Dec. 9 2008

CURSUS ACADEMIQUE / ACADEMIC CURSUS

né en / born 1961

12/2000	Habilitation à Diriger les Recherches (HDR) – spécialité : Astronomie Astrophysique L’observation spatiale et sol des atmosphères planétaires : dynamique, chimie et évolution.
02/1991	Docteur de l’Université Paris 7 – spécialité : Astronomie Astrophysique Spectroscopie UV-visible des constituants de l’atmosphère des planètes telluriques : mesures absorptives in situ (VEGA/ISAV) et par la méthode des occultations stellaires (Mars-96/SPICAM, Envisat/GOMOS)
06/1986	Diplôme d’études approfondies (DEA) Astrophysique et Techniques spatiales, universités Paris 7/Paris 11
06/1985	Licence et Maîtrise de Physique, université Paris-11 (Orsay)

CURSUS PROFESSIONNEL / EMPLOYMENT

01/1999-présent	Planétologue au LESIA, UMR 8109, Observatoire de Paris-Meudon
10/1992-présent	Maître de conférences, Université de Versailles St Quentin, section 34 du CNU
10/1991-09/1992	Bourse post-doctorale du Centre National d’Études Spatiales – Service d’Aéronomie (Verrières-le-Buisson)
10/1989-09/1991	Moniteur à l’Université Pierre-et-Marie-Curie, Centre de Versailles /Paris 11
10/1988-09/1991	Allocataire de thèse MEN au Service d’Aéronomie (Verrières-le-Buisson)
02/1987-06/1988	Volontaire du Service National Actif au Télescope Canada-France–Hawaii (TCFH)

SÉMINAIRE / SEMINAR

2009-2010

Observatoire de Paris/Paris Observatory : Le rôle de l’imaginaire dans la découverte / Role of cultural representations in scientific discovery, T. Widemann (Observatoire de Paris/LESIA) et S. Catellin (Centre d’Histoire Culturelle des Sociétés Contemporaines, UVSQ)

PUBLICATIONS

Publications internationales avec comité de lecture / Peer-reviewed articles

[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.

[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., Schmider, 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.

[A9] Widemann, T., Lellouch, E., and Campargue, A. 2007, New Wind Measurements in Venus’ 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.

[A7] Sicardy, B., Bellucci, A., Gendron, 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 Pluto’s Atmosphere As Revealed By Recent Stellar Occultations, Nature, vol. 424, 168-170, 10 July 2003.

[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., Chassefière, 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.

Conférences internationales invitées avec publications des actes / Invited international conferences with published acts/abstracts

[I4] Widemann, T., Sicardy, B., Lellouch, E., Arlot, J.-E., Colas, F., Hubbard, W., Hill, R. 2008, Titania's radius and an Upper Limit on its Atmosphere from the Sep. 8, 2001 Stellar Occultation, 3rd European Planetary Science Congress, Muenster, Germany, 21-26 September, 2008, EPSC2008-A-00589, p.22.

[I3] Widemann, T., Sicardy, B., Lellouch, L., Ferri, F., Bellucci, A., Hubbard, W.E., and Drossart, P., constraints on thermal and aerosol structure in Titan and Jupiter upper atmospheres from ground based stellar occultations, 36th COSPAR Scientific Assembly, Progress on the Jupiter International Reference Atmosphere (JIRA) and Initial Consideration of Reference Atmospheres for Saturn and Titan (SIRA and TIRA), Beijing, China, July 17-23, 2006.

[I2] Widemann, T., Sicardy, B., Colas, F., Ferri, F., Glass, I., Baba, D., Nagata, T., Beisker, W., Lecacheux, J., Martinez, C. and the Titan occultation team, 2004, Recent Ground-Based Stellar Occultations by Titan : Preliminary Results on Thermal Structure, Central Flash Measurements and Implications for Zonal Wind Regime, Western Pacific Geophysics Meeting, Honolulu, Hawaii, 16-20 August 2004, Eos. Trans. AGU, 85(28), P14A-02.

[I1] Widemann, T., 2003, A Description of Astrophysical Processes of interest to Paleoclimatic and Geophysical Chronology Studies, Invited presentation, Proceedings of International colloquium "Geophysical and Archaelogical Chronologies for the Upper Palaeolithic", Ravello, Italy, May 3-8, 1994, F. Widemann and Y. Taborin eds, Edipuglia, Bari, Italy, 2003, pp. 81-102.

Conférences internationales avec publication des résumés / Contributed communications in international conferences with published abstracts

[C43] Luz, D, Machado, P., Lellouch, E., Widemann, T., Witasse, O., and Bertaux, J.-L. 2009, Characterization of the Venusian atmospheric dynamics with ground-based Doppler velocimetry, 4th European Planetary Science Congress, Potsdam, Germany, 13-18 September, 2009, EPSC Abstracts, Vol. 4, EPCS2009-487.

[C42] Widemann, T., Sornig, M., Sonnabend, G., Lellouch, E., Moreno, R., Luz, D., Gaulme, P., Hartogh, P., Rengel, M., Sagawa, H., and Witasse, O. 2009, A European Coordinated Network for Ground-based Observations of Venus, 4th European Planetary Science Congress, Potsdam, Germany, 13-18 September, 2009, EPSC Abstracts, Vol. 4, EPCS2009-565.

[C41] Sicardy, B., Boissel, Y., Colas, F. Doressoundiram, A., Lecacheux, J., Roques, F., Widemann, T., Beisker, W., Andrei, A., Camargo, R., Martins, R., Silva Neto, D., Bragas, F., Teng, J.-P., Benard, F., Frappa, E., Bolt, G., Broughton, J., Dobotz, T., Gault, D., Kerr, S., Groom, R., Gruhn, C., Lade, B., Herald, D., Batista, V., Grennhill, J., Biggs, J. 2009, Constraints on Charon’s orbit from the stellar occultation of 22 June 2008, 4th European Planetary Science Congress, Potsdam, Germany, 13-18 September, 2009.

[C40] Gaulme, P., Schmider, F.-X., Widemann, T., Plee, V., Lopez, A. and Gelly, B. 2009, Comparison of Doppler wind measurements in Venus atmosphere on Fraunhofer and CO₂ lines, 4th European Planetary Science Congress, Potsdam, Germany, 13-18 September, 2009.

[C39] Widemann, T., Sicardy, B., Assafin, M., and Behrend, R. 2009, Toward a ground-based stellar occultation by a large TNO, 4th European Planetary Science Congress, Potsdam, Germany, 13-18 September, 2009, EPSC2009-A-00296.

[C38] Pasachoff, J.M., Widemann, T., Sicardy, B., Lister, T. and Tholen, D. 2009, Attempted Observations of the 2009 Occultation of a Star by Nix, 214th Meeting of the American Astronomical Society, 7-11 June 2009, Pasadena, CA, #601.01.

[C37] Widemann, T., Sandor, B.J., Clancy, R.T., and Lellouch, E. 2008, New measurements of vertical thermal structure and wind velocities in the Venusian mesosphere, EGU/ 5th European Geophysical Union General Assembly, Vienna, 19-24 April 2009, Geophysical Research Abstracts Vol. 11, EGU2009-A-13143.

[C36] Widemann, T., Sicardy, B., Lellouch, E. 2008, Upper limits for a Titania's atmosphere and for a Large KBO’s Atmosphere From Stellar Occultations, American Astronomical Society, 40th meeting of the Division of Planetary Sciences, Ithaca, NY, 11-15 October 2008, Bull. Am. Astron. Soc. Vol. 40, n°3, p. 461.

[C35] Sicardy, B., Boissel, Y., Colas, F., Roques, F., Widemann, T., Assafin, M., Camargo, J.I.B., da Silva Neto, D.N., Ribas, F.B., Vieira Martins, R., Andrei, A.H., Behrend, R., Beisker, W., Herald, D., Bolt, G., Broughton, J., Dobosz, T., Gault, D., Groom, R., Kerr, S., Anderson, P., Batista, V., Blair, L., Greenhill, J., Frappa, E., Benard, F., Teng, J.-P., Gruhn, C., Blanchard, G, Castets, M. 2008, Pluto Atmospheric Activity, Ephemeris Offset and Charon Orbital Radius Constrained by Stellar Occultations, American Astronomical Society, 40th meeting of the Division of Planetary Sciences, Ithaca, NY, 11-15 October 2008, Bull. Am. Astron. Soc. Vol. 40, n°3, p. 461.

[C34] Boissel, Y., Sicardy, B., Roques, F., Widemann, T., Gaulme, P., Ageorges, N., Ivanov, V., Marco, O., Mason, E., Mousis, O., Rousselot, P., Assafin, M., Ribas, F.B., Camargo, J., da Silva Neto, D., Andrei, A., Vieira Martins, R., Albert, L., Veillet, C., Behrend, R. 2008, Search for Small Satellites and Rings Orbinting Pluto through Stellar Occultations, American Astronomical Society, 40th meeting of the Division of Planetary Sciences, Ithaca, NY, 11-15 October 2008, Bull. Am. Astron. Soc. Vol. 40, n°3, p. 483.

[C33] Widemann, T., Lellouch, E., Donati, J.-F. 2008, Venus Doppler Winds at Cloud Tops Observed with ESPaDOnS at CFHT, 3rd European Planetary Science Congress, Muenster, Germany, 21-26 September, 2008, EPSC2008-A-00561, p.30.

[C32] Sicardy, B., Boissel, Y., Colas, F., Doressoundiram, A., Lecacheux, J., Widemann, T., Frappa, E., Bath, K.-L., Beisker, W., Bernard, O., and the Triton Occultation Team, 2008, The Triton stellar occultation of 21 May 2008, 3rd European Planetary Science Congress, Muenster, Germany, 21-26 September, 2008, EPSC2008-A-00497, p.22.

[C31] Widemann, T., Clouds top winds measured at OHP/Sophie and CFHT, Venus Express Ground-based observation workshop, 17-19 December 2007, ESA/ESTEC, Noordwijk, The Netherlands.

[C30] Widemann, T., Sicardy, B., Gilmore, A., Kilmartin, P., Hearnshaw, J., Batista, V., Greenhill, J., Dieters, S., Mathers, S., Herald, D., Assafin, M., Camargo, J., Neto, D., Andrei, A., Martins Vieira, R., Berhend, R. 2007, The July 31, 2007 Stellar Occultation by Pluto, 39th annual meeting of the Division of Planetary Sciences, Orlando, Fl., 7-12 October 2007, Bull. Am. Astron. Soc. Vol. 39, n°3, 540.

[C29] Sicardy, B., Widemann, T., Colas, F., Doressoundiram, A., Lecacheux, J ; Vachier, F., Beisker, W., Assafin, M., Camargo, J., da Silva Neto, D., Ribas, F.B., Andrei, A., Vieira Martins, R., Behrend, R., Hubbard, W., Larson, S., Marchis, F., Wong, M.H., Serverson, S., Dunham, D., Warner, B.D., Peterson, C., Molnar, L., George, T., Maley, P., Coziol, R., Choi, Y., ESO team, Bath, K., Kretlow, M. 2007, Pluto’s Atmospheric Activity, Ephemeris Offset and Satellite Detections from Observations in 2007, 39th meeting of the Division of Planetary Sciences, Orlando, Fl., 7-12 October 2007, Bull. Am. Astron. Soc. Vol. 39, n°3, 540.

[C28] Widemann, T., Lellouch, E.. 2007, Venus Wind Regime in the Lower Mesosphere, EPSC/ European Planetary Science Congress 2007, Postdam, Germany, 19-24 August 2007, EPSC2007-A-00419, p. 24.

[C27] Widemann, T., Lellouch, E., Luz, D., Moreno, R., Ground-Based Multiwavelength Direct Wind Measurements in Support of Venus Express, EGU/European Geophysical Union General Assembly, Vienna, 15-20 April 2007, EGU2007-A-09723.

[C26] Widemann, T., 2007, Visible Spectroscopy of the Lower Mesosphere, Rencontres de Moriond, Venus Express Science Workshop, La Thuile (Italie), 18-24 mars 2007.

[C25] Widemann, T., Lellouch, E., and Campargue, A. 2006, Wind Measurements in Venus’ Lower Atmosphere From CO₂ Visible Observations, American Geophysical Union Chapman Conference on « Exploring Venus as a Terrestrial Planet », Key Largo, Florida, USA, 13-17 February 2006.

[C24] Sicardy, B., Widemann, T., Lellouch, E., Roques, Gendron, E., Veillet, C., Cuillandre, J.-C., Colas, F., Beisker, W., Kretlow, M., Hainaut, O., Lidman C., 2005, Lage Changes in Pluto's Atmosphere Revelaed by Stellar Occultations, Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 July 2003]. Edited by O. Engvold. San Francisco, CA: Astronomical Society of the Pacific, ISBN 1-58381-189-3. XXIX + 1085 pp., 2005, p.908.

[C23] Widemann, T., And Lellouch, E. 2005, Wind Measurements in Venus' Lower Mesosphere, Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 July 2003]. Edited by O. Engvold. San Francisco, CA: Astronomical Society of the Pacific, ISBN 1-58381-189-3. XXIX + 1085 pp., 2005, p.924.

[C22] Sicardy, B., Widemann, T., Glass, I., Ferri, F., Baba, D., Nagata, T., Beisker, W., Colas, F., Lecacheux, J., Martinez, C., and the Titan occultation team, 2004, The Titan occultations of November 14, 2003, European Geosciences Union 1st General Assembly, Session PS4.2, Outer planets and satellites with an atmosphere, Nice, France, 25-30 April 2004.

[C21] B. Sicardy, F. Colas, Widemann, T., A. Fienga, S. Lacour, J. Lecacheux, E. Lellouch, S. Pau, S. Renner, F. Roques (Paris Obs.) et al. 2004, The two stellar occultations of November 14, 2003: revealing Titan's stratosphere at sub-km resolution, Bull. Am. Astr. Soc. Vol. 36, n°4, DPS 36th Meeting, Louisville, KY. 8-12 nov. 2004, 22-06, p.1119.

[C20] Sicardy, B., Widemann, T., Glass, I., Ferri, F., Baba, D., Nagata, T., Beisker, W., Colas, F., Lecacheux, J., Martinez, C., and the Titan occultation team, 2004, The Titan occultations of November 14, 2003, European Geosciences Union 1st General Assembly, Session PS4.2, Outer planets and satellites with an atmosphere, Nice, France, 25-30 April 2004.

[C19] Widemann, T., Lellouch, E., Bretagne., J.-P., Campargue, A. 2002, Wind Measurements in Venus' Lower Mesosphere from CO₂ Visible Observations, Bull. Am. Astr. Soc. Vol. 34, n°3, DPS 34^rdMeeting, Birmingham, AL. 6-11 oct. 2002, 8-04, p.847.

[C18] Sicardy, B., Colas, F., Widemann, T., Beisker, W., Birnbaum, C., Brooks, K., Delsanti, A., Fienga, A., Gendron, E., Hainaut, O., Kretlow, M., Lagrange, A.-M., Lecacheux, J., Leyrat, C., Maury, A., Raynaud, E., Rapaport, M., Renner, S., Roques, F., Schultheis, M. 2002, The 20 July 2002 occultation of P126 by Pluto, Bull. Am. Astr. Soc. Vol. 34, n°3, DPS 34^rd Meeting, Birmingham, Al. 6-11 oct. 2002, 21-01, p.877.

[C17] Widemann, T., Sicardy, S., Drossart, P., Hubbard, W.B., Raynaud, E., Roques, F. 2001, The Occultation of Star HIP 8369 by Jupiter in the Northern Polar Region on Oct. 10, 1999, Jupiter Meeting, June 26-30, Boulder, CO, Laboratory for Atmospheric and Space Physics (LASP), University of Colorado.

[C16] Widemann, T., Lellouch, E., Campargue, A. 2001, Wind Measurements in Venus' Lower Mesosphere from CO₂ Visible Observations, Bull. Am. Astr. Soc. Vol. 33, n°3, DPS 33rd Meeting, New Orleans, LA, 26 nov-1 dec. 2001

[C15] Matcheva, K., Drossart, P., Raynaud, E., Sicardy, B., Widemann, T. 2001, Gravity Wave-Driven Fluctuations in the H³⁺ Emission of Jupiter, Eos Trans. AGU, 82 (47), Fall Meet. Suppl., Abstract SA51A-0777.

[C14] Sicardy, B., Widemann, T., Colas, F., Lecacheux, J., Pau, S., Thuillot, W., Beisker, W., Birnbaum, C., Hubbard, W.E., Hill, R.E., Porto, J., Lopez, E., Cosias, R., Pallo, E., Percz, R., Pulupa, D., Simbaña, X., Yajamin, A., Recalde, E. 2001, The occultation of HIP 106829 by Titania, Bull. Am. Astr. Soc. Vol. 33, n°3, DPS 33rd Meeting,, New Orleans, LA, #49.05.

[C13] Raynaud, E., Drossart, P., Sicardy, B., Hubbard, W.B., Matcheva, K., Widemann, T., Bastien, P., Doyon, R., Nadeau, D. 2001, Scale-time and correlation analysis of lightcurves from the HIP 9369 occultation by the northern polar region of Jupiter , Bull. Am. Astr. Soc. Vol. 33, n°3, DPS 33^rdMeeting, New Orleans, LA, #11-12.

[C12] Matcheva, K., Drossart, P., Raynaud, E., Sicardy, B., Widemann, T. 2001, Gravity Wave-Driven Fluctuations in the H³⁺ Emission of Jupiter, Bull. Am. Astr. Soc. Vol. 33, n°3, DPS 33^rd Meeting, New Orleans, LA, #22.02.

[C11] Hubbard, W.B., Rieke, M.J., Hill, R., Drossart, P., Roques, F., Sicardy, B., Widemann, T., Doyon, R., Nadeau, D., Marley, M. 2000, Jupiter Mesospheric Structure and Shape from Occultation of SAO 92746 (HIP 9369), DPS 32nd Meeting, Pasadena, CA, Bull. Am. Astr. Soc. Vol. 32, n°3, #11.02.

[C10] Drossart, P., Sicardy, B., Roques, F., Widemann, T., Gladstone, G.R., Waite, J.H., Vincent, M. 2000, The Methane Homopause of Jupiter as seen in IR spectroscopy from the occultation of star HIP 9369, DPS 32nd Meeting, Pasadena, CA, Bull. Am. Astr. Soc. Vol. 32, n°3, #12.09.

[C9] Widemann, T. 1999, Ground Detection of Near-Infrared Molecular Lines in Telluric Water Vapor Absorption Band Near 9360 Å, Observation Of C/1996 B2 Hyakutake And C/1995 O1 Hale-Bopp, Asteroids, Comets, and Meteors 1999, Cornell University, Ithaca, NY., July 26-30, 1999, p. 51.

[C8] Widemann, T. 1998, Ground Observation and Detection of Molecular Lines Of C/1995 O1 Hyakutake And C/1997 O2 Hale-Bopp in Telluric Water Vapor Absorption Band Near 9360 Å, European Geophysical Society XVI General Assembly, Nice, 22-26 April 1998, Ann. Geophys., Suppl.Vol. , C-427.

[C7] Widemann, T., Bertaux, J.L., Moroz, V.I., Ekonomov, A.P. 1994, Vega-1 and 2 descent modules: In-situ measurements of ultraviolet absorption and relationship of SO₂ with presently active volcanism on Venus, Bull. Am. Astr. Soc., vol. 26, n°3, p. 1145.

[C6] Widemann, T., Bertaux, J.-L., Moroz, V.I., Ekonomov, A.P. 1994, Vega-1 and 2 descent modules: in-situ measurements of ultraviolet absorption and vertical profiles of SO₂ in the atmosphere of Venus, European Geophysical Society XIXth General Assembly, Grenoble, 26-29 April 1994, Ann. Geophys., Suppl.Vol. 12 , C-660.

[C5] Widemann, T., Bertaux, J.-L., Moroz, V.I., Ekonomov, A.P. 1993, Vega-1 and 2 descent modules : In-situ measurements of ultraviolet absorption and relationship of SO₂ with presently active volcanism on Venus, Bull. Am. Astr. Soc., vol. 25, n°3, p. 1094.

[C4] Bertaux, J.-L., Widemann, T., Moroz, V.I., Ekonomov, A.P. 1992, Vega measurements of SO₂ through the Atmosphere of Venus : Absence of Evidence for Recent Volcanism, Bull. Am. Astr. Soc., vol. 24, n°3, p. 996.

[C3] Widemann, T., Bertaux, J.-L., Moroz, V.I., Ekonomov, A.P. 1992, In-situ measurements of UV Absorption by Aerosols Particles from the Venus Clouds, Bull. Am. Astr. Soc., vol. 24, n°3, p. 998.

[C2] Bertaux, J.-L., Widemann, T., 1989, SPICAM : Spectroscopy for the investigation of the atmosphere on board MARS-94, Colloque international CNES/Intercosmos: Premiers résultats de la mission PHOBOS et futures missions d'exploration de Mars, Paris, 23-27 octobre 1989, CNES ed., p.122 (3)

[C1] Tully, R. B., Bland, J., Cecil, G.N., Wilson, A.S., Widemann, T., High resolution Fabry-Perot imaging of the extended NLRs in active galaxies, Bull. Am. Astr. Soc., vol. 19, n°4, p. 1049 (1987)

Circulaire de l’Union astronomique internationale (UAI) / International Astronomical Union (IAU) Circular

[U1] Sicardy, B., N. Ageorges, O. Marco, F. Roques, O. Mousis, P. Rousselot, O. Hainaut, A. Bellucci, F. Colas, E. Gendron, E. Lellouch, S. Renner, and T.Widemann, 2006, Pluto III (Hydra), IAU Electronic Telegram No. 610, 31 August 2006.

Cours publiés dans des Écoles Internationales invitées / Invited International Schools with published courses

[S3] Widemann T. 2000, Tidal Effects in the Earth-Moon System, ERCA volume 4, ch. XI, EDP Sciences, Ed. C. Boutron ed., Les Ulis, France, pp 195-203.

[S2] Widemann, T. 1998, History of Earth's Atmosphere over Geological Times, ERCA volume 3, ch. X, EDP Sciences, Ed. C. Boutron, Les Ulis, France, pp. 169-182.

[S1] Widemann, T. 1996, A Description of Astrophysical Processes of interest to Paleoclimatic and Geophysical Chronology Studies, ERCA volume 2, ch. XIV, pp. 377-408, Ed. C. Boutron, Les Éditions de Physique.

Conférences nationales avec publication des actes / Contributed communications in national conferences with published abstracts

[N4] Sicardy, B., Widemann, T., Lellouch, T., Colas, F., Roques, F., Veillet, C., Cuillandre, J.-C. 2003, Drastic changes in Pluto atmosphere revealed by stellar occultations, Semaine de l'Astrophysique Française, meeting held in Bordeaux, France, June 16-20, 2003. Eds.: F. Combes, D. Barret and T. Contini. EdP-Sciences, Conference Series, p. 62.

[N3] Drossart, P., Matcheva, K., Raynaud, E., Roques, F., Sicardy, B., Widemann, T. 2003, Transfert radiatif et dynamique de la mésosphère et l'ionosphère de Jupiter, actes du 3e colloque du Programme national de planétologie de l'INSU, Nantes, 10-12 sept. 2002, p.133

[N2] Sicardy, B., Widemann, T., Colas, F., Lecacheux, J., Pau, S., Thuillot, W., Beisker, W., Birnbaum, C. 2002, L'occultation de l'étoile HIP 106829 par Titania du 8 septembre 2001, actes du 3e colloque du Programme national de planétologie de l'INSU, Nantes, 10-12 sept. 2002, p. 301

[N1] Widemann, T. 1998, l'Atmosphère de Vénus : étude du dioxyde de soufre et de ses réactifs, colloque PNP Grenoble, 1998, Vol. 1, S4-18.

Documents internes / Internal documents

[D6] Lellouch, E., Luz, D., Moreno, R., Widemann, T. 2006, The Dynamics of the Middle Atmosphere of Venus, a Proposal for Supporting Investigation (SI) to Venus Express, in response to ESA Announcement of Opportunity for the selection of Interdisciplinary Scientists and Supporting Investigtors to the Co-Investigators to Venus Express mission, Jan. 2006.

[D5] Barucci, M. A., J.P. Bibring, F. Capaccioni, A. Coradini, M.C. De Sanctis, A. Doressoundiram, E. Dotto, P. Drossart, Th. Encrenaz, S. Erard, P. Farinella, F. Ferri, T. Fouchet, M. Fulchignoni, O. Hainaut, C.-I. Lagerkvist, M. Lazzarin, A. Le Bras, E. Lellouch, V.M. Linkin, Ph. Lognonné, E. Perozzi, G. Piccioni, K.M. Pichkhadze, P. Pinet, H. Rickman, A. Rossi, T. Widemann, A.V. Zakharo 2000, MASTER, proposal for a F2/F3-class mission, European Space Agency, April 2000.

[D4] Fulchignoni, M., Widemann, T. 2000, microbalance à quartz pour le pesage d'échantillons martiens, proposition de recherche spatiale, Centre National d'Études Spatiales, avril 2000.

[D3] Widemann, T., Blamont, J., Trauger, J. 1997, Réponse à l'appel à propositions du Centre National d’Etudes Spatiales « Expériences et missions scientifiques spatiales de taille intermédiaire ». Proposition de micro-satellite d’observation des comètes du groupe de Kreuz dans la raie Lyman-alpha, depuis le point de Lagrange L1. Co-investigateurs : Pr. Jacques Blamont (CNES, Université Paris 6) et Pr. John Trauger (NASA JPL). Phase de pré-sélection.

[D2] Widemann, T., Chassefière, E. 1990, Précision attendue de restitution des profils de concentration d'ozone par l'instrument GOMOS en fonction des caractéristiques instrumentales de fin de phase A (septembre 1990)

[D1] Widemann, T., Bertaux, J.L., Dimarellis, E., Goutail, J.P., Taulemesse, C., Peyroux, R., Baglin, A., Authier, B. 1990, Expériences SPICAM et EVRIS à bord de la sonde Mars-94, Rapport de fin de phase A, soumis au CNES (11 mai 1990, 220 pages).

Ouvrages grand public et articles de vulgarisation / Public outreach publishing in French language

[O6] Widemann, T., and De Bergh, C. 2004, La planète Vénus : son atmosphère, sa surface, in Le passage de Vénus, J.-E. Arlot ed., EDP Sciences, Paris, April 2004, pp. 27-43.

[O5] Agenda astronomique 2005, LESIA, IMCCE et EDP Sciences, Paris, novembre 2004.

[O4] Galilée, Écrits coperniciens, Le livre de Poche, Librairie générale française, 2004. Traduction, présentation, notes et dossier par Philippe Hamou et Marta Spranzi-Zuber. Notes et annexes à caractère astronomique.

[O3] Widemann, T. 2003, Venus Transit, June 8, 2004, invited presentation, Proceedings of Global Hands-On Universe Conference 2002, Université Pierre-et-Marie-Curie, July 24-29, 2002, Frontier Group, ISBN 2914601107, A.-L. Melchior and R. Ferlet eds., pp. 191-194.

[O2] Sicardy, B., Widemann, T. 2002, Y a-t-il une atmosphère autour de Titania ?, L'Astronomie, vol 116, juin 2002, pp. 254-255.

[O1] Encyclopedia Universalis, Grand Atlas Universalis de l'Astronomie, édition 1991: caractéristiques physiques des planètes et satellites du système solaire et leurs paramètres orbitaux.

Oeuvres audiovisuelles d’éducation en langue française / French language TV Education Program

[T1] Lumbroso, V., Van Waerebeke, D., Widemann, T. 1998, La saga des Nobel, Einstein ou la relativité, Centre de ressources et d'information sur les multimédias pour l'enseignement supérieur (CERIMES, http://www.cerimes.education.fr).

SÉMINAIRES RÉCENTS ET CONFÉRENCES / RECENT SEMINARS AND CONFERENCES

2009 Jun 17 : journée scientifique du Bureau des Longitudes, salle Pierre Hugot, Paris : « Des phases de Vénus à sa rotation » (avec V. Dehant)

2009 Mar 24 : séminaire au Laboratoire de Spectrométrie Physique (LSP) de l’université de Grenoble « Bandes visibles et proche IR du CO₂ vénusien, 0.37 - 1.05 microns »

2009 Feb 17 : séminaire à la Division of Geological and Planetary Sciences (GPS) de l’université Caltech « Constrains on a TNO atmosphere by stellar occultations ».

2009 Feb 11: séminaire à l’Observatoire Canada-France-Hawaii, Hawaii (Etats-Unis) : « Coordinated ground-based multiwavelength remote sensing of the Venus’ mesosphere ».

2009 Jan 5 : séminaire « Temps-Espace », Observatoire de Paris / IMCCE-SYRTE : « Contraintes sur l'atmosphère de Titania et des gros objets trans-neptuniens par occultations stellaires »

2008 Jun 19 : séminaire au South African Astronomical Observatory (Cape Town) : « Stellar occultations by Pluto and Triton »

2007 Oct 27 : Mon premier Festival, Mairie de Paris, conférence Cinéma le Grand Action, "Planète Interdite"

2007 Mar 14 : conférence à l'université d'Arizona : "Arizona Telescopes Focus On Pluto Early March 18".

2007 Mar 3 : conférence à l'université d'Orsay : "La Lune, de Hipparque à la conquête spatiale"

2006 conférence à l’Observatoire de Paris, journées du patrimoine et fête de la science, « les limites du système solaire : le cas Pluton ».

ENSEIGNEMENT / TEACHING

OBSERVATOIRE DE PARIS

Master M1 – SDU6 - Histoire de l'astronomie ancienne et moderne

Master M1 – SDTP1 – Planétologie comparée

PARCOURS INTER-UNIVERSITAIRE DE

PLANÉTOLOGIE D'ÎLE-DE-FRANCE

Master M2 – UE0 Le système solaire et les planètes

UNIVERSITÉ DE VERSAILLES-SAINT-QUENTIN ET UNIVERSITÉ PARIS-SUD (Orsay)

Master M1 - MS1EN130 - Planétologie

Occultations stellaires et système solaire lointain

UNIVERSITÉ DE VERSAILLES-SAINT-QUENTIN –

UFR Sciences

Master professionnel : Sciences Arts Culture Innovation Multimédia (SACIM)

Licence L3 – Sciences fondamentales et appliquées

Licence L3 – LSEN280 Astrophysique et Planétologie

Licence L2 - LSCG232 Histoire de la physique

Dernière modification / last modified 24-Jan-2010