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- Title
Study of the Apsidal Motion in the Eclipsing Binary MZ Lac.
- Authors
Kozyreva, V. S.; Kusakin, A. V.; Wolf, M.
- Abstract
A series of highly accurate photoelectric observations of the eclipsing binary MZ Lac was obtained with a 48-cm AZT-14 reflector at the Tien-Shan High-Altitude Station of the Sternberg Astronomical Institute from 1985 to 2004 to study its apsidal motion. We constructed a consistent system of physical and geometrical parameters of the components and the binary’s orbit: we determined their masses (M1 = 1.50M⊙, M2 = 1.29M⊙), radii (R1 = 1.86R⊙, R2 = 1.35R⊙), luminosities (L1 = 0.79L⊙, L2 = 0.45L⊙), surface gravities (log g1 = 4.06, log g2 = 4.27), age (t = 1.9 × 109 yr), and the distance to the binary (d = 510 pc). The binary exhibits apsidal motion with the period Uobs = 480 ± 40 yr, while its theoretically expected value is Uth = 450 ± 40 yr. Spectroscopic studies of MZ Lac and calculations of the absolute parameters of the components are required to test our conclusions.© 2005 Pleiades Publishing, Inc.
- Subjects
MOTION; REFLECTING telescopes; SPEED; DIAGNOSTIC imaging; MASS (Musical form); ECLIPSING binaries; PHOTOELECTRICITY; COSMOLOGICAL distances; PLEIADES Publishing Inc.
- Publication
Astronomy Letters, 2005, Vol 31, Issue 12, p824
- ISSN
1063-7737
- Publication type
Article
- DOI
10.1134/1.2138769