Marek Wolf Astronomical Institute, Charles University Prague, CZ-150 00 Praha 5, Švédská 8,
Czech Republic Present address: Astronomical Institute, Charles University Prague, CZ-180 00
Praha 8, Czech Republic
Lenka (Šarounová) Kotkova Astronomical Institute, CZ-251 65 Ondřejov, Czech Republic
Present address: Astronomical Institute, Academy of Sciences, CZ-251 65 Ondřejov,
Czech Republic
Abstract
The study of apsidal motion in detached eclipsing binary systems with
eccentric orbits is known as an important source of information for stellar internal
structure as well as for the possibility of verification of general relativity outside
the Solar System. Suitable objects for this research were collected by Giménez
and Crawford (1994). In this paper we report a summary of our results on the
observational status of three eccentric binaries with longer periods, namely V541
Cygni, EW Orionis, and GG Orionis, and we appeal to photometrists with moderate
or small telescopes around the world to observe these binaries.