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Title:
A Theory of Extrasolar Giant Planets
Authors:
Saumon, D.; Hubbard, W. B.; Burrows, A.; Guillot, T.; Lunine, J. I.; Chabrier, G.
Publication:
Astrophysical Journal v.460, p.993 (ApJ Homepage)
Publication Date:
04/1996
Origin:
APJ
Astronomy Keywords:
STARS: PLANETARY SYSTEMS
DOI:
10.1086/177027
Bibliographic Code:
1996ApJ...460..993S

Abstract

We present a broad suite of models of extrasolar giant planets (EGPs), ranging in mass from 0.3 to 15 Jupiter masses. The models predict luminosity (both reflected and emitted) as a function of age, mass deuterium abundance, and distance from parent stars of various spectral types. We also explore the effects of helium mass fraction, rotation rate, and the presence of a rock-ice core. The models incorporate the most accurate available equation of state for the interior, including a new theory for the enhancement of deuterium fusion by electron screening, which is potentially important in these low-mass objects, The results of our calculations reveal enormous sensitivity of EGPs to the presence of the parent star, particularly for G and earlier spectral types. They also show a strong sensitivity of the flux contrast in the mid-infrared, between parent star and EGP, to the mass and age of the EGPs. We interpret our results in terms of search strategies for ground- and space-based observatories in place or anticipated in the near future.

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