Discovery of β Cep pulsations in the eclipsing binary V453 Cygni

Scientific paper - Original scientific paper

• Author: J. Southworth
• Author: D. M. Bowman
• Author: A. Tkachenko
• Author: Krešimir Pavlovski
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics; Astronomy and Astrophysics

Abstract (english)

V453 Cyg is an eclipsing binary containing 14 and 11 M⊙ 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.

• Keywords (english): binary stars; fundamental parameters; stellar oscillations
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Accepted version
• Journal title: Monthly Notices of the Royal Astronomical Society
• Numbering: vol. 497, no. 1, pp. L19-L23
• p-ISSN: 0035-8711
• e-ISSN: 1365-2966
• DOI: https://doi.org/10.1093/mnrasl/slaa091
• URN:NBN: urn:nbn:hr:217:283094
• Publication: 2020
• Document URL: https://academic.oup.com/mnrasl/article-abstract/497/1/L19/5838754
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. Published: 18 May 2020.
• Created on: 2020-11-19 19:59:47