Discovery of $\beta$ Cep pulsations in the eclipsing binary V453 Cygni
Abstract
V453 Cyg is an eclipsing binary containing 14 Msun and 11 Msun stars in an eccentric short-period orbit. We have discovered Cep-type pulsations in this system using TESS data. We identify seven significant pulsation frequencies, between 2.37 and 10.51 d, in the primary star. These include six frequencies which are separated by yet significantly offset from harmonics of the orbital frequency, indicating they are tidally-perturbed modes. We have determined the physical properties of the system to high precision: V453 Cyg A is the first Cep pulsator with a precise mass measurement. The system is a vital tracer of the physical processes that govern the evolution of massive single and binary stars.
Cite
@article{arxiv.2005.07559,
title = {Discovery of $\beta$ Cep pulsations in the eclipsing binary V453 Cygni},
author = {J. Southworth and D. M. Bowman and A. Tkachenko and K. Pavlovski},
journal= {arXiv preprint arXiv:2005.07559},
year = {2020}
}
Comments
Accepted for publication as a Letter by MNRAS. 5 pages, 3 figures, 2 tables