Young Jupiters are faint: New models of the early evolution of giant planets

J. J. Fortney, M. S. Marley, O. Hubickyj, P. Bodenheimer, J. J. Lissauer

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Here we show preliminary calculations of the cooling and contraction of a 2 MJ planet. These calculations, which are being extended to 1-10 MJ, differ from other published "cooling tracks" in that they include a core accretion-gas capture formation scenario, the leading theory for the formation of gas giant planets. We find that the initial post-accretionary intrinsic luminosity of the planet is ∼3 times less than previously published models which use arbitrary initial conditions. These differences last a few tens of millions of years. Young giant planets are intrinsically fainter than has been previously appreciated. We also discuss how uncertainties in atmospheric chemistry and the duration of the formation time of giant planets lead to challenges in deriving planetary physical properties from comparison with tabulated model values.

Original languageEnglish (US)
Pages (from-to)925-929
Number of pages5
JournalAstronomische Nachrichten
Issue number10
StatePublished - 2005
Externally publishedYes


  • Planets and satellites: formation
  • Stars: low-mass, brown dwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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