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KIC 4544587: An Eccentric, Short Period Binary with δ Scuti Pulsations and Tidally Excited Modes

Published online by Cambridge University Press:  23 April 2012

Kelly Hambleton ,
Don Kurtz ,
Andrej Prša ,
Steven Bloemen  and
John Southworth
Kelly Hambleton
Affiliation:
Jeremiah Horrocks Institute, University of Central Lancashire, Preston, PR1 2HE email: [email protected]
Don Kurtz
Affiliation:
Jeremiah Horrocks Institute, University of Central Lancashire, Preston, PR1 2HE email: [email protected]
Andrej Prša
Affiliation:
Villanova University, Department of Astronomy and Astrophysics, 800 East Lancaster Avenue, Villanova, PA 19085
Steven Bloemen
Affiliation:
Instituut voor Sterrenkunde, Katholieke Universiteit Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium
John Southworth
Affiliation:
Astophysics Group, Keele University, Newcastle-under-Lyme, ST5 5BG, UK
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Abstract

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KIC 4544587 is an eclipsing binary star with clear signs of apsidal motion and indications of tidal resonance. The primary component is an early A-type δ Scuti variable, with a temperature of 8270±250 K, whilst the secondary component is an early G-type main sequence star with a temperature of 6500±310 K. The orbital period of this system is 2.18911(1) d, with the light curve demonstrating a hump after secondary minimum due to distortion and reflection. The frequency spectrum of the residual data (the original data with the binary characteristics removed) contains both pressure (p) and gravity (g) modes. Eight of the g modes are precise multiples of the orbital frequency, to an accuracy greater than 3 σ. This is a signature of resonant excitation.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S282: From Interacting Binaries to Exoplanets: Essential Modeling Tools , July 2011 , pp. 77 - 78
Copyright
Copyright © International Astronomical Union 2012

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