Two Classes of Hot Jupiters

Details Two Classes of Hot Jupiters Two Classes of Hot Jupiters

2007-06-20

arxiv.org/abs/0706.3052v1

Astrophys.J.671:861-871,2007

Astronomy and Astrophysics

Astrophysics

35 pages, 16 figures in Preprint format. Submitted to ApJ

Scientific paper

10.1086/523038

We identify two classes of transiting planet, based on their equilibrium temperatures and Safronov numbers. We examine various possible explanations for the dichotomy. It may reflect the influence of planet or planetesimal scattering in determining when planetary migration stops. Another possibility is that some planets lose more mass to evaporation than others. If this evaporation process preferentially removes Helium from the planet, the consequent reduction in the mean molecular weight may explain why some planets have anomalously large radii.

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