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Transit timing variations, radial velocities, and long-term dynamical stability of the system Kepler-410

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GAJDOŠ Pavol VAŇKO Martin PRIBULLA Theodor DUPKALA Daniel ŠUBJAK Ján SKARKA Marek KABÁTH Petr HAMBÁLEK Lubomír PARIMUCHA Štefan

Rok publikování 2019
Druh Článek v odborném periodiku
Časopis / Zdroj Monthly Notices of the Royal Astronomical Society
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
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Doi http://dx.doi.org/10.1093/mnras/stz305
Klíčová slova planetary systems; planets and satellites: dynamical evolution andstability; techniques: radial velocities; methods: numerical; stars: individual: Kepler-410
Popis Transit timing variations of Kepler-410Ab were already reported in a few papers.Their semi-amplitude is about 14.5 minutes. In our previous paper, we found thatthe transit timing variations could be caused by the presence of a stellar companionin this system. Our main motivation for this paper was to investigate variation in aradial-velocity curve generated by this additional star in the system. We performedspectroscopic observation of Kepler-410 using three telescopes in Slovakia and CzechRepublic. Using the cross-correlation function, we measured the radial velocities of thestar Kepler-410A. We did not observe any periodic variation in a radial-velocity curve.Therefore, we rejected our previous hypothesis about additional stellar companionin the Kepler-410 system. We ran different numerical simulations to study mean-motion resonances with Kepler-410Ab. Observed transit timing variations could bealso explained by the presence of a small planet near to mean-motion resonance 2:3with Kepler-410Ab. This resonance is stable on a long-time scale. We also looked forstable regions in the Kepler-410 system where another planet could exist for a longtime.
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