Radial velocity observations and physical activities of the contact binary system SW Lacertae

Details Radial velocity observations and physical activities of the contact binary system SW Lacertae Radial velocity observations and physical activities of the contact binary system SW Lacertae

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989acaps...9..208z&link_type=abstract

(Acta Astrophysica Sinica, vol. 9, no. 3, 1989, p. 208-217) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 13, Dec. 1

Physics

4

Binary Stars, Light Curve, Radial Velocity, Stellar Activity, Mass Transfer, Stellar Physics, Stellar Spectra

Scientific paper

Radial velocity observations of the active W UNa system SW Lac made in 1984 are presented. The observations give a new spectroscopic mass ratio of 1.255 + or - 0.011. A joint solution of the velocity and light curves gives the following revised absolute parameters: M1 = 0.78 solar mass, M2 = 0.96 solar mass, R1 = 0.91 solar radius, and R2 = 1.00 solar radius. The probable mass transfer, mass loss, spot activity, and other physical properties of SW Lac are discussed.

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