Relativistic apsidal motion in eccentric eclipsing binaries

0354432 - ASÚ 2011 RIV FR eng J - Journal Article
Wolf, M. - Claret, L. - Kotková, Lenka - Kučáková, H. - Kocián, R. - Brát, L. - Svoboda, P. - Šmelcer, L.
Relativistic apsidal motion in eccentric eclipsing binaries.
Astronomy & Astrophysics. Roč. 509, January (2010), A18/1-A18/14. ISSN 0004-6361. E-ISSN 1432-0746
Grant - others:GA ČR(CZ) GA205/04/2063; GA ČR(CZ) GA205/06/0217
Institutional research plan: CEZ:AV0Z10030501
Keywords : binaries eclipsing
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 4.410, year: 2010

As part of the long-term Ondrejov and Ostrava observational projects, we aim to measure precise times of minima for eccentric eclipsing binaries, needed for the accurate determination of apsidal motion, providing a suitable test of the effects of General Relativity. We confirm very long periods of apsidal motion for all systems. For BF Dra and V1094 Tau, we present the first apsidal-motion solution. The relativistic effects are dominant, representing up to 100% of the total observable apsidal-motion rate in several systems. The theoretical and observed values of the internal structure constant k(2) were compared for systems with lower relativistic contribution. Using the light-time effect solution, we predict a faint third component for V1094 Tau orbiting with a short period of about 8 years.
Permanent Link: http://hdl.handle.net/11104/0193433