Lithium depletion in the brown dwarf binary GJ 569Bab

    Authors

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

    Comments

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    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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