Title

Lithium depletion in the brown dwarf binary GJ 569Bab

Authors

Authors

M. R. Z. Osorio; E. L. Martin; B. F. Lane; Y. Pavlenko; H. Bouy; I. Baraffe;G. Basri

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Astro. Nachr.

Keywords

binaries : general; stars : low-mass, brown dwarfs; LOW-MASS STARS; THERMONUCLEAR REACTION-RATES; GLIESE 569B; SUBSTELLAR; OBJECTS; COMPANION; SPECTRA; Astronomy & Astrophysics

Abstract

GJ 569Bab is the first brown dwarf binary for which the mass of each component has been derived by solving the astrometric and spectroscopic orbit of the pair, i.e., independently of any theoretical assumption. This allows us to test the predictions of the various evolutionary models available in the literature. Particularly interesting are the predictions of lithium depletion for the mass (0.08-0.05 M.) and likely age (300-800 Myr) of the substellar components. High-resolution optical spectra of GJ 569B (the pair is not resolved) obtained with HIRES at the Keck telescope show that there has been significant lithium depletion in both components. We will compare these results to state-of-the-art theoretical calculations.

Journal Title

Astronomische Nachrichten

Volume

326

Issue/Number

10

Publication Date

1-1-2005

Document Type

Article; Proceedings Paper

Language

English

First Page

948

Last Page

951

WOS Identifier

WOS:000234434000018

ISSN

0004-6337

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