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=1989cha%26a..13..350z&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 13, Issue 4, p. 350-359.

Astronomy and Astrophysics

Astrophysics

4

Contact Binaries - Radial Velocity - Activities

Scientific paper

We present our 1984 radial velocity observations of the W UNa system SW Lac. These give a new spectroscopic mass ratio qsp = 1.255 +/-0.011. A joint solution of the velocity and light curves give the following revised absolute parameters: M1 = 0.78 M⊚, M2 = 0.96M⊚, R1 = 0.91R⊚, and R2 = 1.00 R⊚. Based on our new results, together with a detailed review of the period changes, probable mass transfer, mass loss, spot activity and other physical properties of SW Lac are discussed.

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