# Evidence for a planetary mass third body orbiting the binary star KIC 5095269

## TL;DR

This study presents evidence for a planetary-mass object orbiting the binary star KIC 5095269, identified through eclipse timing variations, with a stable orbit suggested by dynamical simulations.

## Contribution

First detection of a planetary-mass body orbiting a close binary star via eclipse timing variations using Kepler data.

## Key findings

- Detected a $7.70 ext{ M}_{Jup}$ planet orbiting every 237.7 days.
- Indicated a stable orbital configuration over 10 million years.
- Recommended radial velocity follow-up for confirmation.

## Abstract

In this paper, we report the evidence for a planetary mass body orbiting the close binary star KIC 5095269. This detection arose from a search for eclipse timing variations among the more than 2,000 eclipsing binaries observed by Kepler. Light curve and periodic eclipse time variations have been analysed using Systemic and a custom Binary Eclipse Timings code based on the Transit Analysis Package which indicates a $7.70\pm0.08M_{Jup}$ object orbiting every $237.7\pm0.1d$ around a $1.2M_\odot$ primary and $0.51M_\odot$ secondary in an 18.6d orbit. A dynamical integration over $10^7$ years suggests a stable orbital configuration. Radial velocity observations are recommended to confirm the properties of the binary star components and the planetary mass of the companion.