Publication Title

Astrophysical Journal

LP 133-373: A New Chromospherically Active Eclipsing dMe Binary with a Distant, Cool White Dwarf Companion

Authors

Todd R. Vaccaro, St. Cloud State UniversityFollow
A. Kawka, Astronomický ústav Akademie věd České republiky
T. D. Oswalt, Florida Institute of Technology - Melbourne
I. Silver, Florida Institute of Technology - Melbourne
M. Wood, Florida Institute of Technology - Melbourne
J. Allyn Smith, Austin Peay State University

Document Type

Article

Publication Date

6-2007

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 M_solar and 0.33+/-0.02 R_solar. 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_solar, which would make the system at least 3 Gyr old

Comments

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.

Recommended Citation

Vaccaro, Todd R.; Kawka, A.; Oswalt, T. D.; Silver, I.; Wood, M.; and Smith, J. Allyn, "LP 133-373: A New Chromospherically Active Eclipsing dMe Binary with a Distant, Cool White Dwarf Companion" (2007). Physics and Astronomy Faculty Publications. 4.
https://repository.stcloudstate.edu/phys_facpubs/4