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The upper atmosphere of the exoplanet HD209458b revealed by the sodium D lines: Temperature-pressure profile, ionization layer, and thermosphere
A. Vidal-Madjar, D. K. Sing, A. Lecavelier des Etangs +6
A complete reassessment of the HST observations of the transits of the extrasolar planet HD209458b has provided a transmission spectrum of the atmosphere over a wide range of wavel…
Transit spectrophotometry of the exoplanet HD189733b. II. New Spitzer observations at 3.6 microns
J. -M. Desert, D. Sing, A. Vidal-Madjar +6
We present a new primary transit observation of the hot-jupiter HD189733b, obtained at 3.6 microns with the Infrared Array Camera (IRAC) onboard the Spitzer Space Telescope. Previo…
Gran Telescopio Canarias OSIRIS Transiting Exoplanet Atmospheric Survey: Detection of potassium in XO-2b from narrowband spectrophotometry
D. K. Sing, J. -M. Desert, J. J. Fortney +8
We present Gran Telescopio Canarias (GTC) optical transit narrow-band photometry of the hot-Jupiter exoplanet XO-2b using the OSIRIS instrument. This unique instrument has the capa…
The Earth as an extrasolar transiting planet: Earth's atmospheric composition and thickness revealed by Lunar eclipse observations
Alfred Vidal-Madjar, Luc Arnold, David Ehrenreich +24
An important goal within the quest for detecting an Earth-like extrasolar planet, will be to identify atmospheric gaseous bio-signatures. Observations of the light transmitted thro…
Observation of the full 12-hour-long transit of the exoplanet HD80606b. Warm-Spitzer photometry and SOPHIE spectroscopy
G. Hebrard, J. -M. Desert, R. F. Diaz +24
We present new observations of a transit of the 111-day-period exoplanet HD80606b. Using the Spitzer Space Telescope and its IRAC camera on the post-cryogenic mission, we performed…
Evaporation of the planet HD189733b observed in HI Lyman-alpha
A. Lecavelier des Etangs, D. Ehrenreich, A. Vidal-Madjar +7
We observed three transits of the extrasolar planet HD189733b in HI Lyman-alpha and in a few other lines in the ultraviolet with HST/ACS, in the search for atmospheric signatures.…