Astronomy and Astrophysics – Astronomy
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasp..102..535g&link_type=abstract
Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 102, May 1990, p. 535-542.
Astronomy and Astrophysics
Astronomy
8
B Stars, Binary Stars, F Stars, Optical Emission Spectroscopy, Orbital Elements, Radial Velocity, Stellar Systems, D Lines, Elliptical Orbits, Space Observations (From Earth), Spectrograms, Stellar Luminosity, Velocity Measurement
Scientific paper
The orbit of the peculiar interacting F8 + B binary system is established on the basis of 93 radial-velocity measurements mostly made photoelectrically. The period is 140.78 days, the velocity amplitude is 70 km/s, and the orbit has a small but nevertheless significant eccentricity. The mass function of 5 solar masses is extraordinarily large and probably indicates that the F-type component is the secondary in terms of mass. Optical spectroscopy in the red region reveals strong and variable H-alpha emission, forbidden N II emission at the gamma-velocity of the system, and N I and Na I absorption of circumstellar origin.
Bopp Bernard William
Dempsey Robert
Griffin Roger F.
Parsons Sidney B.
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