A New Detached M Dwarf Eclipsing Binary
Abstract
We describe a newly-discovered detached M-dwarf eclipsing binary system, the fourth such system known. This system was first observed by the TrES network during a long term photometry campaign of 54 nights. Analysis of the folded light curve indicates two very similar components orbiting each other with a period of 1.12079 +/- 0.00001 days. Spectroscopic observations with the Hobby-Eberly Telescope show the system to consist of two M3e dwarfs in a near-circular orbit. Double-line radial velocity amplitudes, combined with the orbital inclination derived from light-curve fitting, yield Mass total = 0.983 +/- 0.007 solar masses, with component masses M(1) = 0.493 +/- 0.003 and M(2) = 0.489 +/- 0.003 solar masses. The light-curve fit yields component radii of R(1) = 0.453 +/- 0.060 and R(2) = 0.452 +/- 0.050 solar radii. Though a precise parallax is lacking, broadband VJHK colors and spectral typing suggest component absolute magnitudes of M_V(1) = 11.18 +/- 0.30 and M_V(2) = 11.28 +/- 0.30.
Cite
@article{arxiv.astro-ph/0504490,
title = {A New Detached M Dwarf Eclipsing Binary},
author = {O. L. Creevey and G. F. Benedict and T. M. Brown and R. Alonso and P. Cargile and G. Mandushev and D. Charbonneau and B. E. McArthur and W. Cochran and F. T. O'Donovan and S. J. Jiménez-Reyes and J. A. Belmonte and D. Kolinski},
journal= {arXiv preprint arXiv:astro-ph/0504490},
year = {2008}
}
Comments
15 pages, 3 figure, 3 tables, accepted by ApJL, additional references