Transit timing variations, radial velocities, and long-term dynamical stability of the system Kepler-410
| Authors | |
|---|---|
| Year of publication | 2019 |
| Type | Article in Periodical |
| Magazine / Source | Monthly Notices of the Royal Astronomical Society |
| MU Faculty or unit | |
| Citation | |
| web | Full Text |
| Doi | http://dx.doi.org/10.1093/mnras/stz305 |
| Keywords | planetary systems; planets and satellites: dynamical evolution andstability; techniques: radial velocities; methods: numerical; stars: individual: Kepler-410 |
| Description | 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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