2005ApJ...625L.127C

We describe a newly discovered detached M dwarf eclipsing binary system. 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 M_total= 0.983±0.007 M_☉, with component masses of M₁=0.493±0.003 M_☉and M₂=0.489±0.003 M_☉. The light-curve fit yields component radii of R₁=0.453±0.060 R_☉and R₂=0.452±0.050 R_☉. Although 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.