Bridging the Gap: A New Eclipsing M Dwarf Binary, 2MASS 0426+0323

Details Bridging the Gap: A New Eclipsing M Dwarf Binary, 2MASS 0426+0323 Bridging the Gap: A New Eclipsing M Dwarf Binary, 2MASS 0426+0323

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21443303b&link_type=abstract

American Astronomical Society, AAS Meeting #214, #433.03; Bulletin of the American Astronomical Society, Vol. 41, p.704

Astronomy and Astrophysics

Astronomy

Scientific paper

We report on the discovery of a new eclipsing M dwarf system: 2MASS 0426+0323. This system was originally identified as an eclipsing system by Plavchan et al (2008) using photometry from 2MASS calibration regions. We have obtained high resolution echelle spectroscopy with the MIKE spectrograph at Las Campanas Observatory and constructed a radial velocity curve for 2MASS 0426+0323. Combining our radial velocities with the 2MASS photometry, we obtain masses and radii of both stellar members. The system is composed of two mid-type M dwarfs, and provides crucial empirical constraints on existing mass--radius relations, especially at the lower masses, where existing data are sparse.

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