Two classes of hot jupiters

Brad M.S. Hansen, Travis Barman

Research output: Contribution to journalArticlepeer-review

127 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)861-871
Number of pages11
JournalAstrophysical Journal
Issue number1
StatePublished - Dec 10 2007


  • Binaries: eclipsing
  • Planetary systems: formation
  • Scattering

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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