Discovery of ß Cep pulsations in the eclipsing binary V453 Cygni

Southworth, John; Bowman, D M; Tkachenko, A; Pavlovski, K

doi:10.1093/mnrasl/slaa091

Discovery of ß Cep pulsations in the eclipsing binary V453 Cygni

Southworth, John; Bowman, D M; Tkachenko, A; Pavlovski, K

Authors

Dr John Taylor j.k.taylor@keele.ac.uk

D M Bowman

A Tkachenko

K Pavlovski

Abstract

V453 Cyg is an eclipsing binary containing 14 and 11 $\, \rm M_ødot$ stars in an eccentric short-period orbit. We have discovered ß 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 ß 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.

Journal Article Type	Article
Acceptance Date	May 14, 2020
Online Publication Date	May 18, 2020
Publication Date	2020-09
Publicly Available Date	May 26, 2023
Journal	Monthly Notices of the Royal Astronomical Society: Letters
Publisher	Oxford University Press
Peer Reviewed	Peer Reviewed
Volume	497
Issue	1
Pages	L19–L23
DOI	https://doi.org/10.1093/mnrasl/slaa091
Keywords	binaries: eclipsing, stars: fundamental parameters, stars: oscillations
Publisher URL	https://academic.oup.com/mnrasl/article/497/1/L19/5838754