Possible Observational Criteria for Distinguishing Brown Dwarfs from Planets

Details Possible Observational Criteria for Distinguishing Brown Dwarfs from Planets Possible Observational Criteria for Distinguishing Brown Dwarfs from Planets

1997-10-14

arxiv.org/abs/astro-ph/9710150v1

Astronomy and Astrophysics

Astrophysics

LaTeX, 11 pages including 2 figures, accepted for publication in the Astrophysical Journal Letters

Scientific paper

10.1086/311026

The difference in formation process between binary stars and planetary systems is reflected in their composition as well as their orbital architecture, particularly orbital eccentricity as a function of orbital period. It is suggested here that this difference can be used as an observational criterion to distinguish between brown dwarfs and planets. Application of the orbital criterion suggests that with three possible exceptions, all of the recently-discovered substellar companions discovered to date may be brown dwarfs and not planets. These criterion may be used as a guide for interpretation of the nature of sub-stellar mass companions to stars in the future.

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