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Detection of Sectoral Modes in the Eclipsing Binary KIC 4851217

Published online by Cambridge University Press:  29 August 2019

M. Fedurco ,
Š. Parimucha  and
P. Gajdoš
M. Fedurco
Affiliation:
Institute of Physics, Faculty of Natural Sciences, Šafárik University, Košice, Slovakia email: miroslav.fedurco@student.upjs.sk
Š. Parimucha
Affiliation:
Institute of Physics, Faculty of Natural Sciences, Šafárik University, Košice, Slovakia email: miroslav.fedurco@student.upjs.sk
P. Gajdoš
Affiliation:
Institute of Physics, Faculty of Natural Sciences, Šafárik University, Košice, Slovakia email: miroslav.fedurco@student.upjs.sk
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Abstract

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KIC 4851217 is a short period eclipsing binary (P = 2.47 days) in the field of the Kepler K1 mission. As well as variability caused by the eclipses, low-amplitude pulsations are also present in the data. A frequency analysis of the residual light-curve revealed δ Sct pulsations in the frequency range from 15–21 d−1 with amplitudes up to 3.5 mmag. Strong linear coupling (fi = fp + kforb) to orbital frequency was found, indicating tidally locked modes. From an analysis of 5 selected groups of frequencies we identified a radial mode on the secondary component, 3 dipole modes (l = |m| = 1), one of them present on the secondary component, and a quadrupole mode (l = |m| = 2), also located on the secondary component.

Keywords

Stars: binaries: eclipsingstars: variablesstars: pulsations
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S339: Southern Horizons in Time-Domain Astronomy , November 2017 , pp. 295 - 298
Copyright
© International Astronomical Union 2019 

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