The Double-Lined Spectroscopic Binary G209-35: Testing Stellar Evolution Models

Details The Double-Lined Spectroscopic Binary G209-35: Testing Stellar Evolution Models The Double-Lined Spectroscopic Binary G209-35: Testing Stellar Evolution Models

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...195.7606p&link_type=abstract

American Astronomical Society, 195th AAS Meeting, #76.06; Bulletin of the American Astronomical Society, Vol. 31, p.1484

Astronomy and Astrophysics

Astronomy

Scientific paper

A new spectroscopic orbit was derived for the double-lined binary G209-35 (HD 195987) based on 52 spectra taken over the past 16 years. An orbital inclination of 90^{o}2 \pm 6^{o}0 was derived for G209-35 from the Hipparcos intermediate results; the new orbit and this inclination yielded component masses of 0.7907 \pm 0.0143 M_{\odot} and 0.6297 \pm 0.0069 M_{\odot}$. Comparison of the G209-35 components to recent stellar isochrones and evolutionary tracks showed some disagreement between the models and the G209-35 data. In particular, the magnitude difference between the G209-35 primary and secondary was consistently larger than the models' predictions for stars of the derived masses. Outside of this, the G209-35 data were in closest agreement with interpolations of models computed by Baraffe et al. (1997).

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