Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...291..473s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 291, no. 2, p. 473-480
Astronomy and Astrophysics
Astrophysics
5
Binary Stars, Radial Velocity, Stellar Mass, Variable Stars, Astronomical Photometry, Electrophotometers, Light Curve
Scientific paper
On the basis of 8 years of photoelectric monitoring in the Stromgren system we were able to establish that HD 50123 is an interacting binary consisting of a B6Ve primary and an early K giant secondary which fills its Roche lobe. The orbital period is 28.601 days. The secondary contributes considerably to the flux in the y and b bands, in which the double-sinusoidal light curve typical for ellipsoidal variables is seen. A few published radial velocities of the primary are consistent with a semiamplitude of K1 = 25 + or - 6 km/s, and a mass function f(M) = 0.046 + or - 0.026 solar mass. Preliminary estimates of the stellar masses give 5 and 1.5 solar mass, respectively, for primary and secondary. Some implications for the binary interpretation of Be stars, as well as for the period distribution of ellipsoidal variables, are discussed.
Mennickent Ronald
Sterken Christiaan
Vogt Nicolas
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