Search for Carbon Monoxide in the atmosphere of the Transiting Exoplanet HD189733b (2009)
Desert, Jean-Michel, Etangs, Alain Lecavelier Des, Hebrard, Guillaume, Sing, David K., Ehrenreich, David, Ferlet, Roger, ...
Water, methane and carbon-monoxide are expected to be among the most abundant molecules besides molecular hydrogen in the hot atmosphere of close-in EGPs. Transit observations in the mid-IR allow the...
New observations of the extended hydrogen exosphere of the extrasolar planet HD209458b (2008)
Ehrenreich, David, Etangs, Alain Lecavelier Des, Hébrard, Guillaume, Désert, Jean-Michel, Vidal-Madjar, Alfred, McConnell, John C., ...
Atomic hydrogen escaping from the planet HD209458b provides the largest observational signature ever detected for an extrasolar planet atmosphere. However, the Space Telescope Imaging Spectrograph...
A Spitzer Search for Water in the Transiting Exoplanet HD189733b (2007)
Ehrenreich, David, Hébrard, Guillaume, Etangs, Alain Lecavelier Des, Sing, David K, Désert, Jean-Michel, Bouchy, François, ...
We present Spitzer Space Telescope observations of the extrasolar planet HD189733b primary transit, obtained simultaneously at 3.6 and 5.8 microns with the Infrared Array Camera. The system...
Ehrenreich, David, Etangs, Alain Lecavelier Des, Beaulieu, Jean-Philippe, Grasset, Olivier
Extrasolar planets as light as a few Earths are now being detected. Such planets are likely not gas or ice giants. Here, we present a study on the possible properties of the small and cold extrasolar...
A posteriori detection of the planetary transit of HD189733b in the Hipparcos photometry (2005)
Hebrard, Guillaume, Etangs, Alain Lecavelier Des
Thanks to observations performed at the Haute-Provence Observatory, Bouchy et al. recently announced the detection of a 2.2-day orbital period extra-solar planet that transits the disk of its parent...
The transmission spectrum of Earth-size transiting planets (2005)
Ehrenreich, David, Tinetti, Giovanna, Etangs, Alain Lecavelier Des, Vidal-Madjar, Alfred, Selsis, Franck
A variety of terrestrial planets with different physical parameters and exotic atmospheres might plausibly exist outside our Solar System, waiting to be detected by the next generation of...
The Observation of Circumstellar Disks: Dust and Gas Components (2004)
Dutrey, Anne, Etangs, Alain Lecavelier Des, Augereau, Jean-Charles
Since the 1990's, protoplanetary disks and planetary disks have been intensively observed from the optical to the millimetre wavelength and many models have been developed to investigate their gas...
"Osiris"(HD209458b), an evaporating planet (2003)
Vidal-Madjar, Alfred, Etangs, Alain Lecavelier Des
Three transits of the planet orbiting the solar type star HD209458 were observed in the far UV at the wavelength of the HI Ly-alpha line. The planet size at this wavelength is equal to 4.3 R_Jup,...