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An extended upper atmosphere around the extrasolar planet HD209458b
TLDR
The detection of atomic hydrogen absorption in the stellar Lyman α line during three transits of HD209458b is reported, showing that this absorption should take place beyond the Roche limit and therefore can be understood in terms of escaping hydrogen atoms.
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A Far Ultraviolet Spectroscopic Explorer Survey of Interstellar Molecular Hydrogen in Translucent Clouds
We report the first ensemble results from the Far Ultraviolet Spectroscopic Explorer survey of molecular hydrogen in lines of sight with AV ≳ 1 mag. We have developed techniques for fitting computed…
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Limits on the Macho Content of the Galactic Halo from the EROS-2 Survey of the Magellanic Clouds
The EROS-2 project was designed to test the hypothesis that massive compact halo objects (the so-called ''machos'') could be a major component of the dark matter halo of the Milky Way galaxy. To this…
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A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
TLDR
The difference between the planetary radius measured at optical and infrared wavelengths is an effective metric for distinguishing different atmosphere types, so that strong water absorption lines are seen in clear-atmosphere planets and the weakest features are associated with clouds and hazes.
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MOLECULAR HYDROGEN IN THE FAR ULTRAVIOLET SPECTROSCOPIC EXPLORER TRANSLUCENT LINES OF SIGHT: THE FULL SAMPLE
We report total abundances and related parameters for the full sample of the Far Ultraviolet Spectroscopic Explorer survey of molecular hydrogen in 38 translucent lines of sight. New results are…
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Evaporation of the planet HD 189733b observed in H I Lyman-α
We observed three transits of the extrasolar planet HD 189733b in HI Lyman-α and in a few other lines in the ultraviolet with HST/ACS, in the search for atmospheric signatures. We detect a transit…
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Water vapour in the atmosphere of a transiting extrasolar planet
TLDR
An analysis of recent observations of the hot Jupiter HD 189733b taken during the transit, when the planet passed in front of its parent star, finds that absorption by water vapour is the most likely cause of the wavelength-dependent variations in the effective radius of the planet.
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Detection of Oxygen and Carbon in the Hydrodynamically Escaping Atmosphere of the Extrasolar Planet HD 209458b
Four transits of the planet orbiting the star HD 209458 were observed with the Space Telescope Imaging Spectrograph on board the Hubble Space Telescope. The wavelength domain (1180-1710 Å) includes H…
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Temporal variations in the evaporating atmosphere of the exoplanet HD 189733b
Atmospheric escape has been detected from the exoplanet HD 209458b through transit observations of the hydrogen Lyman-α line. Here we present spectrally resolved Lyman-α transit observations of the…
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NA I as a tracer of H I in the diffuse interstellar medium.
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