EPJ Web of Conferences
Volume 101, 2015The Space Photometry Revolution – CoRoT Symposium 3, Kepler KASC-7 Joint Meeting
|Number of page(s)||4|
|Section||Session 6 – Posters|
|Published online||23 September 2015|
A planet orbiting an sdB star and an M dwarf in 2M 1938+4603
1 Pedagogical University of Cracow, ul. Podchorazych 2, 30-084 Cracow - Poland
2 Astronomical Observatory of the Jagiellonian University, ul. Orla 171, 30–244 Cracow - Poland
a e-mail: firstname.lastname@example.org
Published online: 23 September 2015
We present a preliminary analysis of the 2M 1938+4603 star. It is an eclipsing binary system consisting of a primary sdB component and a secondary M dwarf. The photometric data are dominated by mutual eclipses and a very strong reflection effect. The primary has a fairly rich pulsation spectrum which can be used to study its interior. On the other hand, the pulsations affect the binary trend and vice versa what makes the analysis very difficult. Therefore, we attempted at proper modeling of the light variation due to eclipses and reflection and their removal from the data so it does not affect the Fourier analysis of stellar pulsations. We focus on mid-times of over 16 000 primary and secondary minima, which were used to verify stability of the orbital period. The O-C diagram indicates possible parabolic and sinusoidal variations, commonly explained by period changes caused by evolution and a presence of a third body, respectively.
© Owned by the authors, published by EDP Sciences, 2015
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