Olivier Chesneau  et al.
USING ADAPTIVE OPTICS AND LONG BASELINE INTERFEROMETRY TO STUDY COMPLEX DUSTY OBJECTS (Poster)

USING ADAPTIVE OPTICS AND LONG BASELINE INTERFEROMETRY TO STUDY COMPLEX DUSTY OBJECTS

Olivier Chesneau  et al.
Observatoire de la Côte d'Azur, 1 avenue Copernic, O6130 Grasse

Combining MIDI and NACO observation in thermal infrared allows to obtain high spatial resolution observations of dusty environments. The typical resolution of NACO in L' band is about 100mas and the strehl ratio provided by the AO allows to reach a resolving power up to 40-60mas using deconvolution techniques. MIDI used with UTs provides acquisition images improved by the MACAO AO system with a typical resolution of 230mas at 8.7$\mu$m, that can also be increased up to 120-150mas. MIDI in interferometric mode, provides a typical resolution of 20mas, but usually only a handful of visibility measurements are recorded, limiting the complexity of the geometrical information extracted. Hence, the complementary use of NACO is well suited to observe complex extended objects. Several examples are shown: Eta Car, the AGB star RY Sgr and the planetary nebulae CPD-568032 and QX Pup.