Physical Sciences and Mathematics Commons^™

The Very Short Period M Dwarf Binary Sdss J001641–000925, James R. A. Davenport, Andrew C. Becker, Andrew A. West, John J. Bochanski, Suzanne L. Hawley, Jon Holtzman, Heather C. Gunning, Eric J. Hilton, Ferah A. Munshi, Meagan Albright

Physics & Astronomy

We present follow-up observations and analysis of the recently discovered short period low-mass eclipsing binary, SDSS J001641–000925. With an orbital period of 0.19856 days, this system has one of the shortest known periods for an M dwarf binary system. Medium-resolution spectroscopy and multi-band photometry for the system are presented. Markov Chain Monte Carlo modeling of the light curves and radial velocities yields estimated masses for the stars of M ₁ = 0.54 ± 0.07 M _☉ and M ₂ = 0.34 ± 0.04 M _☉, and radii of R ₁ = 0.68 ± 0.03 R _☉ and R _{2 …}