Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-05-03
Astronomy and Astrophysics
Astrophysics
5 pages, 2 figures, accepted in A&A Letter
Scientific paper
10.1051/0004-6361:200500123
We compare evolutionary models for close-in exoplanets coupling irradiation and evaporation due respectively to the thermal and high energy flux of the parent star with observations of recently discovered new transiting planets. The models provide an overall good agreement with observations, although at the very limit of the quoted error bars of OGLE-TR-10, depending on its age. Using the same general theory, we show that the three recently detected hot-Neptune planets (GJ436, $\rho$ Cancri, $\mu$ Ara) may originate from more massive gas giants which have undergone significant evaporation. We thus suggest that hot-Neptunes and hot-Jupiters may share the same origin and evolution history. Our scenario provides testable predictions in terms of the mass-radius relationships of these hot-Neptunes.
Allard France
Baraffe Isabelle
Barman Travis S.
Chabrier Gilles
Hauschildt Peter. H.
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