Fixing the Mass of the Bright Giant HD 173764

Details Fixing the Mass of the Bright Giant HD 173764 Fixing the Mass of the Bright Giant HD 173764

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7486p&link_type=abstract

HST Proposal ID #7486

Astronomy and Astrophysics

Astronomy

Hst Proposal Id #7486 Cool Stars

Scientific paper

TRANS mode interferometry of HD 173764, at an estimated distance of 150 pc, has resolved the component separation of this G4 II + B9 spectroscopic binary system. With its 832 day period, the binary will be observable over a large range of orbital motion during the next year. The FGS measurements, analyzed with respect to the spectroscopic orbit, will yield the system's inclination, distance, luminosities, and sum of the component masses. Concurrent POS mode astrometry will provide the mass ratio. Since G-type bright giants and supergiants are relatively rare, the primary's mass and luminosity are especially important for comparison with theory for rapid post main sequence evolution.

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