Article
LP 133-373: A New Chromospherically Active Eclipsing dMe Binary with a Distant, Cool White Dwarf Companion
Astrophysical Journal
Document Type
Article
Publication Date
6-1-2007
Disciplines
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 day 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 Msolar and 0.33+/-0.02 Rsolar. 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 Msolar, which would make the system at least 3 Gyr old
Citation Information
Todd R. Vaccaro, A. Kawka, T. D. Oswalt, I. Silver, et al.. "LP 133-373: A New Chromospherically Active Eclipsing dMe Binary with a Distant, Cool White Dwarf Companion" Astrophysical Journal (2007) Available at: http://works.bepress.com/terry_d_oswalt/26/
Note: This article was first published as:
Vaccaro, T. R., et al. (2007). "LP 133-373: A New Chromospherically Active Eclipsing dMe Binary with a Distant, Cool White Dwarf Companion" The Astrophysical Journal, Vol. 661, No. 2: 1112-1118.
The article was subsequently published at SAO/NASA Astrophysics Data System.