An accurate RV-curve for the new low-mass, double-lined, detached eclipsing binary ROTSEJ522155.16+335604.1

Details An accurate RV-curve for the new low-mass, double-lined, detached eclipsing binary ROTSEJ522155.16+335604.1 An accurate RV-curve for the new low-mass, double-lined, detached eclipsing binary ROTSEJ522155.16+335604.1

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003noao.prop..263l&link_type=abstract

NOAO Proposal ID #2003A-0263

Computer Science

Scientific paper

The theoretical mass-radius relation for low-mass stars with M <=1M_sun is currently constrained by only four observational measurements from the components of the double-lined, detached eclipsing binaries YYGem, and CMDra. We need, therefore, more observations to test the goodness of the models of stellar structure. We have now found a new binary of characteristics similar to the two systems above. The object, ROTSEJ152155.16+335604.1, has a V-I 2.00 +/- 0.02 (I=11.7), and an estimated orbital period of 0.48872 days. These parameters suggest masses of the individual stars of about 0.5M_sun, or less, which makes it an extremely valuable target of study to obtain two new accurate values of masses and radii of low-mass stars, from its light and radial velocity curves. Multiband light curves will be obtained at the SARA telescope. We request therefore time at the KPNO 4-m telescope to complete the necessary observations, by deriving the RV-curve of the system. The determination of these two new masses and radii will increase by more than 30% the number of existing observational data to constrain those models.

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