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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.

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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:
URLURL TypeDescription
Hambleton, K.0000-0001-5473-856X
Kurtz, D.0000-0002-1015-3268
Fuller, J.0000-0002-4544-0750
Thompson, S.0000-0001-7106-4683
Additional Information:© 2015 Astronomical Society of the Pacific.
Series Name:Astronomical Society of the Pacific Conference Series
Issue or Number:496
Record Number:CaltechAUTHORS:20160225-152958808
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64778
Deposited By: Ruth Sustaita
Deposited On:26 Feb 2016 01:02
Last Modified:09 Mar 2020 13:19

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