Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pasp..100..730d&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 100, June 1988, p. 730-735.
Astronomy and Astrophysics
Astronomy
Eclipsing Binary Stars, Galactic Structure, Light Curve, Galactic Evolution, Halos, Late Stars
Scientific paper
Observations of a faint, red, short-period Galactic eclipsing binary discovered during a recent study of RR Lyrae variables in the halo of M 31 are presented. A possible light-curve solution indicates that the components are of similar size, have temperatures of approximately 3700 K and 2800 K, are non-main-sequence objects, and may have undergone mass transfer. A lower limit for the distance to the system is determined, and the resulting displacement above the Galactic plane is sufficient to preclude the binary being a member of the thin disk. The observed frequency of faint short-period eclipsing binaries at intermediate to high Galactic latitudes is investigated. The surface density of eclipsing binaries appears to be relatively constant over a large range of Galactic latitudes. It is suggested that some of the eclipsing binaries discovered in past surveys could be members of the thick disk or halo.
Davidge Tim J.
Pritchet Chris J.
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