The eclipsing binary V78 Omega Centauri

Details The eclipsing binary V78 Omega Centauri The eclipsing binary V78 Omega Centauri

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aj.....84.1216l&link_type=abstract

Astronomical Journal, vol. 84, Aug. 1979, p. 1216, 1217. Research supported by the Harvard College Observatory

Astronomy and Astrophysics

Astronomy

2

Centaurus Constellation, Eclipsing Binary Stars, Light Curve, Radial Velocity, Balmer Series, Electrophotometers, Light Elements, Main Sequence Stars, Stellar Spectrophotometry

Scientific paper

Spectroscopic radial-velocity data are used to determine a circular-orbit solution for the eclipsing binary V78 in the field of Omega Cen. Values of V0 = -96 + or - 5 km/s and K = -43 + or - 8 km/s are obtained, along with approximate values of 2 solar masses for the primary mass, 0.4 solar mass for the secondary, 1.5 solar radii for the primary radius, and 2.0 solar radii for the secondary. The spectral type of V78 is found to be A0, and the equivalent widths of the Balmer lines at maximum light are shown to suggest that the primary is a main-sequence star. It is concluded that V78 appears to be an Algol-type close binary.

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