Is the atmosphere of the hottest known transiting exoplanet evaporating?

Details Is the atmosphere of the hottest known transiting exoplanet evaporating? Is the atmosphere of the hottest known transiting exoplanet evaporating?

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11651h&link_type=abstract

HST Proposal ID #11651. Cycle 17

Physics

Scientific paper

WASP-12 is the hottest and the largest currently known transiting exoplanet. It has the shortest orbital period and is the closest to its host star. Previous spectacular HST observations revealed that the atmosphere of HD 209458b appears to be evaporating away, though this interpretation has recently been questioned. We propose ultraviolet observations of WASP-12 to learn whether it is in a state of hydrodynamic `blow-off' as the work on HD 209458b would suggest. We will obtain a precise radius for the planet, free from systematic errors caused by the earth's atmosphere. We will use our data to hone models of exoplanet atmospheres.;

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