The Masses of the O-Type Binary 15 Monocerotis

Details The Masses of the O-Type Binary 15 Monocerotis The Masses of the O-Type Binary 15 Monocerotis

Jul 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.6045g&link_type=abstract

HST Proposal ID #6045

Astronomy and Astrophysics

Astronomy

Hst Proposal Id #6045 Hot Stars

Scientific paper

The O-type star 15 Mon (HD 47839) was recently discovered to be a speckle and spectroscopic binary with an orbital period of 25 years. An analysis of both the radial velocity curve and astrometric orbit yields the masses of the components and distance to the system. Both radial velocity and astrometric measurements are scant at present, but the system is now approaching periastron (1998.8) and continued spectroscopic and astrometric monitoring will lead to a definitive orbit and yield important information about the masses of O stars. FGS measurements of separation, position angle, and magnitude difference are needed to bridge the gap between current speckle observations and the next generation of optical interferometers.

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