Poster - Splinter Exoplanets

Thursday, 14 September 2023, 15:15   (H 3007)

Photodynamical analysis of the exomoon candidate around Kepler-1513b

Ceren H. Bayraktar (1), Yağmur Pekşen (2)
(1) Georg-August-Universität Göttingen, (2) Yeditepe University

Looking at our own Solar System, we find that moons are ubiquitous with a total of over 200 moons orbiting only 8 planets. As more and more exoplanets are being discovered, about 4000 of which have been observed to transit their host star, the potential to find exomoons around them becomes increasingly promising. Two methods have so far mainly been used to search for exomoons: observations of combined exoplanet-exomoon transits (e.g. with eclipses) and transit timing variations (TTVs) of the host planets. Of the three most promising exomoon candidates so far, two have previously been investigated with detailed photodynamical transit models (Kepler-1625b and Kepler-1708b), and two show TTV signals (Kepler-1625b and Kepler-1513b). In our study, we perform a photodynamical analysis on the newest of these candidates, Kepler-1513b, using the open-source exomoon transit detection algorithm Pandora. We give close attention to the detrending process of the Kepler light curve, considering that moon transit features are prone to distortion caused by the chosen method and window length.