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Heartbeat Stars and the Ringing of Tidally Induced Pulsations

Hambleton, K. and Kurtz, D. and Prša, A. and Fuller, J. and Thompson, S. (2015) Heartbeat Stars and the Ringing of Tidally Induced Pulsations. In: Living Together: Planets, Host Stars and Binaries. Astronomical Society of the Pacific Conference Series. No.496. Astronomical Society of the Pacific , San Francisco, CA, p. 162. ISBN 978-1-58381-877-0. http://resolver.caltech.edu/CaltechAUTHORS:20160225-152958808

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Abstract

With the advent of high precision photometry from satellites such as Kepler and CoRoT, a whole new layer of interesting and astounding astronomical objects has been revealed: heartbeat stars are a prime example of such objects. Heartbeat stars are eccentric ellipsoidal variables that undergo strong tidal interactions at the time of closest approach, when the stars are almost in contact. These interactions cause a significant variation in the surface areas of the stars and are observed in the form of a tidal pulse. A subset of these objects (~20%) show prominent tidally induced pulsations. We now have a fully functional code that models binary star features (using phoebe) and stellar pulsations simultaneously, enabling a complete and accurate heartbeat model to be determined. In this talk we show the results of our new code, which uses emcee, a variant of MCMC, to generate a full set of stellar parameters. We further highlight some of the interesting features of selected heartbeat stars, including resonant pulsations, frequency modulation, solar-like oscillations, and resonantly locked modes.


Item Type:Book Section
Related URLs:
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http://aspbooks.org/custom/publications/paper/496-0162.htmlPublisherArticle
ORCID:
AuthorORCID
Fuller, J.0000-0002-4544-0750
Thompson, S.0000-0001-7106-4683
Additional Information:© 2015 Astronomical Society of the Pacific.
Group:TAPIR
Record Number:CaltechAUTHORS:20160225-152958808
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160225-152958808
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64778
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:26 Feb 2016 01:02
Last Modified:13 Sep 2017 15:23

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