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- W2066218114 abstract "Among the nearly five hundred extra-solar planets known, almost 30% orbit closer than 0.1 AU from their parent star. We will review the observations and the corresponding models of the evaporation of these ‘hot jupiters’. The observations started with the discovery made with HST that the planet orbiting HD 209458 has an extended atmosphere of escaping hydrogen. Subsequent observations obtained with HST/STIS and HST/ACS confirm the escape of the gas. Even more, oxygen and carbon have been shown to be present at very high altitude in the upper atmosphere. Observations of other targets like HD 189733 and WASP-12 show that evaporation is a general phenomenon which could contribute to the evolution of planets orbiting close to their parent stars. To interpret these observations, we developed models to quantify the escape rate from the measured occultation depths. Numerous models have also been published to investigate mechanisms which can lead to the estimated escape rate. In general, the high temperature of the upper atmosphere heated by the far and extreme UV combined with the tidal forces allow a very efficient evaporation of the upper atmosphere. We will review the different models and their implications." @default.
- W2066218114 created "2016-06-24" @default.
- W2066218114 creator A5085237456 @default.
- W2066218114 date "2011-01-01" @default.
- W2066218114 modified "2023-09-25" @default.
- W2066218114 title "Evaporation of hot jupiters and hot neptunes" @default.
- W2066218114 doi "https://doi.org/10.1051/epjconf/20101103006" @default.
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