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Theory of low mass stars, brown dwarfs and extra-solar giant planets

Published online by Cambridge University Press:  25 May 2016

Gilles Chabrier  and
Isabelle Baraffe
Gilles Chabrier
Affiliation:
C.R.A.L., Ecole Normale Supérieure, 69364 Lyon Cedex 07, France [email protected]
Isabelle Baraffe
Affiliation:
C.R.A.L., Ecole Normale Supérieure, 69364 Lyon Cedex 07, France [email protected]

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Accurate modeling of the mechanical and thermal properties of very-lowmass stars (VLMS), Brown Dwarfs (BD) and Extra-solar Giant Planets (EGP) is of prior importance for a wide range of physical and astrophysical problems, from the fundamental physics point of view to the astrophysical and cosmological implications. They provide natural laboratories to test the different theories, equations of state, nuclear reaction rates, model atmospheres aimed at describing the physics of dense and cool objects. They represent the largest stellar population in the Galaxy, and thus provide a substantial contribution to the Galactic (disk) mass budget. Finally they represent one of the most intriguing questions in our understanding of the formation of star-like objects: are planet and star formation processes really different? Is there, and if so what is, a minimum mass for the formation of star-like objects? This field has blossomed recently with the discovery of several brown dwarfs (Nakajima et al, 1995; Rebolo et al., 1995) and numerous exoplanets since 51 Pegasi (Mayor and Queloz 1995; Mayor, this conference), which provide important information to challenge the theory.

Type
Stellar Models Versus Observations
Information
Symposium - International Astronomical Union , Volume 189: Fundamental Stellar Properties: The Interaction Between Observation and Theory , 1997 , pp. 331 - 340
Copyright
Copyright © Kluwer 1997 

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