A Second Stellar Color Locus: a Bridge from White Dwarfs to M stars | Zendy

V. Smolčić | Zendy; Željko Ivezić | Zendy; G. R. Knapp | Zendy; Robert H. Lupton | Zendy; K. Pavlovski | Zendy; Saša Ilijić | Zendy; David J. Schlegel | Zendy; J. A. Smith | Zendy; P. McGehee | Zendy; Nicole M. Silvestri | Zendy; Suzanne L. Hawley | Zendy; Constance M. Rockosi | Zendy; James E. Gunn | Zendy; Michael A. Strauss | Zendy; Xiaohui Fan | Zendy; Daniel Eisenstein | Zendy; Hugh C. Harris | Zendy

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A Second Stellar Color Locus: a Bridge from White Dwarfs to M stars

Author(s) -

V. Smolčić,

Željko Ivezić,

G. R. Knapp,

Robert H. Lupton,

K. Pavlovski,

Saša Ilijić,

David J. Schlegel,

J. A. Smith,

P. McGehee,

Nicole M. Silvestri,

Suzanne L. Hawley,

Constance M. Rockosi,

James E. Gunn,

Michael A. Strauss,

Xiaohui Fan,

Daniel Eisenstein,

Hugh C. Harris

Publication year - 2004

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/426475

Subject(s) - physics , white dwarf , astrophysics , stars , sky , astronomy , locus (genetics) , binary number , mathematics , biology , arithmetic , biochemistry , gene

We report the discovery of a locus of stars in the SDSS g-r vs. u-gcolor-color diagram that connects the colors of white dwarfs and M dwarfs.While its contrast with respect to the main stellar locus is only ~1:2300, thispreviously unrecognized feature includes 863 stars from the SDSS Data Release1. The position and shape of the feature are in good agreement with predictionsof a simple binary star model that consists of a white dwarf and an M dwarf,with the components' luminosity ratio controlling the position along thisbinary system locus. SDSS DR1 spectra for 47 of these objects strongly supportthis model. The absolute magnitude--color distribution inferred for the whitedwarf component is in good agreement with the models of Bergeron et al. (1995).Comment: submitted to ApJ, 4 pages, 4 color figure

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