LP133-373: A New Chromospherically Active Eclipsing dMe Binary with a Distant, Cool White Dwarf Companion

Abstract

We report the discovery of the partially eclipsing binary LP 133-373. Nearly identical eclipses along with observed photometric colors and spectroscopy indicate that it is a pair of chromospherically active dM4 stars in a circular 1.6 d orbit. Light and velocity curve modeling to our differential photometry and velocity data show that each star has a mass and radius of 0.340+/-0.014 M_sun and 0.33+/-0.02 R_sun. The binary is itself part of a common proper motion pair with LP 133-374 a cool DC or possible DA white dwarf with a mass of 0.49-0.82 M_sun, which would make the system at least 3 Gyr old.

Accepted for publication in ApJ

References in corpus (8)

• A Computational Guide to Physics of Eclipsing Binaries. Paper I. Demonstrations and Perspectives
• Radial Velocities for 889 Late-type Stars
• Found: The missing blue opacity in atmosphere models of cool hydrogen white dwarfs
• Spectroscopic Identification of Cool White Dwarfs in the Solar Neighbourhood
• 2MASS J05162881+2607387: A New Low-Mass Double-Lined Eclipsing Binary
• The Chromospheric Activity and Ages of M Dwarf Stars in Wide Binary Systems
• A new detached K7 dwarf eclipsing binary system
• Very Cool Close Binaries

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