Discovery and Analysis of New Very Low-Mass Pre-Main-Sequence Eclipsing Binaries

Details Discovery and Analysis of New Very Low-Mass Pre-Main-Sequence Eclipsing Binaries Discovery and Analysis of New Very Low-Mass Pre-Main-Sequence Eclipsing Binaries

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.9303s&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #93.03; Bulletin of the American Astronomical Society, Vol. 34, p.1259

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present an update on our program to discover new, low-mass, pre-main-sequence (PMS) eclipsing stars, which we use to empirically test and calibrate PMS stellar evolutionary models. We have completed our analyses of SM790, a double-lined spectroscopic, eclipsing binary in Orion. We derive component masses of 1.01 Msun and 0.73 Msun for the primary and secondary, respectively. The formal uncertainties on the masses are ~ 1%. We compare the empirically determined positions of these stars on the H-R diagram to those predicted from various PMS stellar evolutionary models. If our scheduled Gemini program is successfully executed, we will also present our first spectroscopic observations of a newly discovered eclipsing binary system that promises to yield empirical stellar masses at or near the stellar/sub-stellar boundary.

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