| Issue |
EAS Publications Series
Volume 82, 2019
Astro Fluid: An International Conference in Memory of Professor Jean-Paul Zahn's Great Scientific Achievements
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|---|---|---|
| Page(s) | 99 - 106 | |
| Section | Tides in Stars and Planets | |
| DOI | https://doi.org/10.1051/eas/1982010 | |
| Published online | 21 June 2019 | |
A.S. Brun, S. Mathis, C. Charbonnel and B. Dubrulle (eds)
EAS Publications Series, 82 (2019) 99-106
Third-body perturbed apsidal motion in eclipsing binaries
1 Baja Astronomical Observatory of Szeged University, H-6500 Baja, Szegedi út, Kt. 766, Hungary
2 Department of Astronomy, Eötvös University, H-1118 Pázmány Péter stny. 1/A, Budapest, Hungary
3 M.I.T. Department of Physics and Kavli Institute for Astrophysics and Space Research, 70 Vassar St., Cambridge, MA 02139, USA
Tidally forced apsidal motion in eccentric eclipsing binaries is a key observable of stellar structure studies, and may serve as important probe for different tidal dissipation theories. There are, however, alternative physical processes which result in additional contributions to the observed apsidal motion. Here we mainly concentrate on the perturbing effect of a third, distant stellar companion, forming a hierarchical triple system with the eclipsing pair. First we discuss the mathematical form of the combined third body and tidally forced apsidal motions, and its observational aspects. Then we present a brief description of an eclipse timing variation study (based on the above mentioned analytical formulae) of 26 Kepler spacecraft-discovered 3-rd body perturbation-dominated compact hierarchical triples.
© EAS, EDP Sciences, 2019