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The Pseudosynchronization of Binary Stars Undergoing Strong Tidal Interactions

Zimmerman, Mara K. and Thompson, Susan E. and Mullally, Fergal and Fuller, Jim and Shporer, Avi and Hambleton, Kelly (2017) The Pseudosynchronization of Binary Stars Undergoing Strong Tidal Interactions. Astrophysical Journal, 846 (2). Art. No. 147. ISSN 1538-4357.

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Eccentric binaries known as heartbeat stars experience strong dynamical tides as the stars pass through periastron, providing a laboratory to study tidal interactions. We measure the rotation periods of 24 heartbeat systems, using the Kepler light curves to identify rotation peaks in the Fourier transform. Where possible, we compare the rotation period to the pseudosynchronization period derived by Hut. Few of our heartbeat stars are pseudosynchronized with the orbital period. For four systems, we were able to identify two sets of rotation peaks, which we interpret as the rotation from both stars in the binary. Most stars in our sample have rotation rates larger than the pseudosynchronization period while a single target rotates much faster than this rate. The majority of the systems have a rotation period that is approximately 3/2 times the pseudosynchronization period, suggesting that other physical mechanisms strongly influence the star's evolution.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Thompson, Susan E.0000-0001-7106-4683
Fuller, Jim0000-0002-4544-0750
Shporer, Avi0000-0002-1836-3120
Hambleton, Kelly0000-0001-5473-856X
Additional Information:© 2017 American Astronomical Society. Received 2017 June 9. Accepted 2017 August 7. Published 2017 September 12.
Group:Astronomy Department
Subject Keywords:binaries: close; stars: evolution; stars: magnetic field
Issue or Number:2
Record Number:CaltechAUTHORS:20170912-134909967
Persistent URL:
Official Citation:Mara K. Zimmerman et al 2017 ApJ 846 147
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:81367
Deposited By: Ruth Sustaita
Deposited On:13 Sep 2017 15:24
Last Modified:09 Mar 2020 13:18

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