Skip to main content

Research Repository

Advanced Search

REDISCUSSION OF ECLIPSING BINARIES. PAPER 7: DELTA SCUTI, GAMMA DORADUS, AND TIDALLY-PERTURBED PULSATIONS IN RR LYNCIS

Taylor

REDISCUSSION OF ECLIPSING BINARIES. PAPER 7: DELTA SCUTI, GAMMA DORADUS, AND TIDALLY-PERTURBED PULSATIONS IN RR LYNCIS Thumbnail


Authors



Abstract

RR Lyn is a detached eclipsing binary with a 9.95 d orbit containing two A-stars: one metallic-lined and one possibly metal-poor. We use the light curve from the TESS satellite and two sets of published radial velocity measurements to determine the properties of the system to high precision. We find masses of 1.939 ± 0.007 and 1.510 ± 0.003 M?, and radii of 2.564 ± 0.019 and 1.613 ± 0.013 R?. After adjusting published effective temperatures upwards by 200 K we find a good agreement with theoretical models for a solar chemical composition and an age of 1 Gyr, and a distance slightly shorter than expected from the Gaia EDR3 parallax. The light curve of RR Lyn shows clear evidence for pulsations. We measure 35 pulsation frequencies and attribute the higher frequencies to d Scutitype pulsations, and the intermediate frequencies to ? Doradustype pulsations (some of which may be tidally perturbed). The lower frequencies may be tidally excited pulsations in RR Lyn or alternatively of instrumental origin. Most or all of these pulsations are likely to arise in the secondary star. RR Lyn is one of the few eclipsing binaries known to have well-established properties and to exhibit multiple types of pulsations.

Journal Article Type Article
Acceptance Date Nov 1, 2021
Publication Date Dec 1, 2021
Publicly Available Date Mar 29, 2024
Journal Observatory
Print ISSN 0029-7704
Peer Reviewed Peer Reviewed
Volume 141
Pages 282

Files




You might also like



Downloadable Citations