The Kepler Eclipsing System KIC 5621294 and its Substellar Companion
Jae Woo Lee, Kyeongsoo Hong, and Tobias Cornelius Hinse

TL;DR
This study analyzes the Kepler eclipsing binary KIC 5621294, revealing a third substellar companion likely a brown dwarf, and discusses period variations caused by additional companions and stellar activity.
Contribution
First detailed analysis of KIC 5621294 combining light and timing variations, identifying a substellar third body and complex period modulations.
Findings
Eclipsing system is a classical Algol-type with specific parameters.
Detected a third body with a mass suggesting a brown dwarf.
Orbital period shows sinusoidal and parabolic variations, indicating multiple companions.
Abstract
We present the physical properties of KIC 5621294 showing light and timing variations from the photometry. Its light curve displays partial eclipses and O'Connell effect with Max II fainter than Max I, which was fitted quite well by applying third-body and spot effects to the system. The results indicate that the eclipsing pair is a classical Algol-type system with parameters of =0.22, =76.8, and (--)=4,235 K, in which the detached primary component fills about 77\% of its limiting lobe. Striking discrepancies exist between the primary and secondary eclipse times obtained with the method of Kwee \& van Woerden. These are mainly caused by surface inhomogeneities due to spot activity detected in our light-curve synthesis. The 1,253 light-curve timings from the Wilson-Devinney code were used for a period study. It was found that the…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
