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Searching for low-mass companions around white dwarfs and subdwarfs from Kepler field

Published online by Cambridge University Press:  09 October 2020

Jurek Krzesinski Open the ORCID record for Jurek Krzesinski [Opens in a new window]  and
Adam Blokesz
Jurek Krzesinski
Affiliation:
Astronomical Observatory of the Jagiellonian University, ul. Orla 171, 30-244 Krakow, Poland email: [email protected]
Adam Blokesz
Affiliation:
Pedagogical University of Cracow, ul. Podchorazych 2, 30-084 Cracow, Poland email: [email protected]
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Abstract

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Knowing the late stages of the stellar evolution is crucial for understanding the fate of planets around subdwarfs and white dwarfs. Simulations by (Staff et al.2016) show, that exoplanets engulfed in the extending stellar envelope will quickly spiral down onto the parent star. Therefore, we do not expect to find planets on close by orbits to the subdwarfs (Blokesz et al.2019) or white dwarfs. However, the recent observation of planetary debris around WD 1145+017 white dwarf suggests, there might exists planets farther away from these stars. Using binarograms, O-C diagrams and Fourier transform for the Kepler space telescope data, we investigate a problem of missing planets around white dwarfs in binary systems, single white dwarfs and subdwarfs type B. The last ones, being the only stars which (due to the lack of hydrogen) go directly to the white dwarf cooling track after their red giant phase.

Keywords

(stars:) planetary systems(stars:) subdwarfs(stars:) white dwarfs(stars:) binaries: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S357: White Dwarfs as Probes of Fundamental Physics: Tracers of Planetary, Stellar and Galactic Evolution , October 2019 , pp. 41 - 44
Copyright
© International Astronomical Union 2020

References

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