EDP Sciences
Free Access
Volume 420, Number 2, June III 2004
Page(s) 619 - 624
Section Stellar structure and evolution
DOI https://doi.org/10.1051/0004-6361:20035927

A&A 420, 619-624 (2004)
DOI: 10.1051/0004-6361:20035927

Apsidal motion in eccentric eclipsing binaries: V871 Aql, V345 Lac, V401 Lac and CR Sct

M. Wolf1, P. Harmanec1, 2, L. Sarounová2, M. Zejda3, H. Bozic4, K. Hornoch1, V. S. Kozyreva5, T. Hynek6 and L. Král6

1  Astronomical Institute, Charles University of Prague, 180 00 Praha 8, V Holesovickách 2, Czech Republic
2  Astronomical Institute, Academy of Sciences, 251 65 Ondrejov, Czech Republic
3  Nicholas Copernicus Observatory and Planetarium, 616 00 Brno, Czech Republic
4  Hvar Observatory, Faculty of Geodesy, Zagreb University, 10000 Zagreb, Croatia
5  Sternberg Astronomical Institute, State University Moscow, University Avenue 13, Moscow 119899, Russia
6  Johann Palisa Observatory and Planetarium, Technical University Ostrava, 708 33 Ostrava-Poruba, Czech Republic

(Received 22 December 2003 / Accepted 20 February 2004)

About thirty new times of minimum light recorded with photoelectric or CCD photometers were obtained for several little studied eccentric-orbit eclipsing binaries V871 Aql ( $P=3\fd0$, e=0.13), V345 Lac ( $ 7\fd5, 0.46$), V401 Lac ( $ 2\fd0, 0.16$) and CR Sct ( $ 4\fd2, 0.09$). Their $\rm O{-}C$ diagrams were analyzed using all reliable timings found in the literature and in all cases an apsidal motion was either discovered or confirmed. The new values for the elements of the apsidal motion were derived. We find periods of apsidal motion of about 255, 7000, 79.4 and 4400 years for V871 Aql, V345 Lac, V401 Lac and CR Sct, respectively.

Key words: stars: binaries: eclipsing -- stars: general -- stars: fundamental parameters

Offprint request: M. Wolf, wolf@cesnet.cz

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© ESO 2004

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