Spectroscopy of DENIS nearby stars candidates

    Authors

    F. Crifo; N. Phan-Bao; X. Delfosse; T. Forveille; J. Guibert; E. L. Martin;C. Reyle

    Comments

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

    Abbreviated Journal Title

    Astron. Astrophys.

    Keywords

    stars : low-mass; brown dwarfs; solar neighbourhood; stars : fundamental; parameters; stars : distances; LOW-MASS STARS; LATE-M DWARFS; COOL NEIGHBORS; PROPER MOTION; FAINT; STARS; PHOTOMETRY; CATALOG; CLASSIFICATION; ASTROMETRY; SOUTHERN; Astronomy & Astrophysics

    Abstract

    We present spectra of 36 nearby star candidates and 3 red giant candidates, identified in the DENIS database. 32 of the dwarf candidates are nearby red dwarfs, with spectral types from M 5.5 to M 8.5. Out of 11 targets with low proper motion (mu < 0.1 arcsec yr(-1)) but a Reduced Proper Motion above an inclusive threshold, 9 are red dwarfs. The 4 contaminants are all reddened F-K main sequence stars, and could have been eliminated by checking for small well-known high latitude molecular clouds. These stars might be of interest as probes of interstellar absorption. For the red dwarfs we derive spectral types and spectroscopic distances, using a new calibration of the PC3 spectral index to absolute magnitudes in the I, J, H and K photometric bands. We confirm 2 new members of the 12 pc volume (2 new M 8.5), and one M 7.5 NLTT object closer than 10 pc; and show that one quarter of the stars with photometric distances under 30 pc have too small a proper motion for inclusion in the NLTT catalog.

    Journal Title

    Astronomy & Astrophysics

    Volume

    441

    Issue/Number

    2

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    653

    Last Page

    661

    WOS Identifier

    WOS:000231958600020

    ISSN

    0004-6361

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