Southworth, J, Bowman, DM, Tkachenko, A and Pavlovski, K (2020) Discovery of β Cep pulsations in the eclipsing binary V453 Cygni. Monthly Notices of the Royal Astronomical Society: Letters, 497 (1). ISSN 1745-3933

[thumbnail of Discovery of β Cep pulsations.pdf]
Discovery of β Cep pulsations.pdf - Published Version

Download (758kB) | Preview


V453 Cyg is an eclipsing binary containing 14 and 11 $\, \rm M_ødot$ stars in an eccentric short-period orbit. We have discovered β Cep-type pulsations in this system using Transiting Exoplanet Survey Satellite data. We identify seven significant pulsation frequencies, between 2.37 and 10.51 d−1, in the primary star. These include six frequencies that 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 β 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.

Item Type: Article
Additional Information: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model ( The final version of this article and all relevant information can be found online at;
Uncontrolled Keywords: binaries: eclipsing, stars: fundamental parameters, stars: oscillations
Subjects: Q Science > Q Science (General)
Q Science > QB Astronomy
Q Science > QB Astronomy > QB460 Astrophysics
Q Science > QB Astronomy > QB799 Stars
Q Science > QC Physics
Divisions: Faculty of Natural Sciences > School of Chemical and Physical Sciences
Depositing User: Symplectic
Date Deposited: 29 Oct 2020 15:06
Last Modified: 24 Feb 2021 16:49

Actions (login required)

View Item
View Item