Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2012-01-23
BASI, 38, 137 (2010)
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
arXiv admin note: substantial text overlap with arXiv:0902.3938
Scientific paper
This article presents a review on the observations and theoretical modeling of the evaporation of extrasolar planets. The observations and the resulting constraints on the upper atmosphere (thermosphere and exosphere) of the "hot-Jupiters". are described. The early observations of the first discovered transiting extrasolar planet, HD209458b, allowed the discovery that this planet has an extended atmosphere of escaping hydrogen. Subsequent observations showed the presence of oxygen and carbon at very high altitude. These observations give unique constraints on the escape rate and mechanism in the atmosphere of hot-Jupiters. The most recent Lyman-alpha HST observations of HD189733b and MgII observations of Wasp-12b allow for the first time comparison of the evaporation from different planets in different environments. Models to quantify the escape rate from the measured occultation depths, and an energy diagram to describe the evaporation state of hot-Jupiters are presented. Using this diagram, it is shown that few already known planets like GJ876d or CoRot-7b could be remnants of formerly giant planets.
No associations
LandOfFree
Evaporation of extrasolar planets does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evaporation of extrasolar planets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evaporation of extrasolar planets will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-496474