Abstract

Poster - Splinter General   (MW-1801 / virtual plenum)

Searching for undetected exoplanet signals in the CARMENES DR1 with Kima

Jan-Hendrik Gleißberg, Prof. Dr. Stefan Dreizler
Institute of Astrophysics and Geophysics (IAG), University of Göttingen

Radial-velocity surveys of M dwarfs provide a promising method to find exoplanets. However, some periodical signals remain unclear after subtracting already published exoplanets and periodical properties of a target star. Furthermore, the recovery is often complicated due to issues regarding separation from activity signatures, sampling aliases, or instrumental distortions. This work tries to find missing periodical signals within in the CARMENES DR1. As a part of an ongoing Master thesis project we combine generalized Lomb-Scargle periodograms, window function analysis, activity indicators, and Bayesian model comparison with nested sampling using Kima to distinguish possible planetary signals. Additionally, we try to complement our findings with other archival data from HARPS/HARPS-N. This poster will present the analysis workflow and selected case studies by highlighting promising periodic signals and ambiguous cases where signals are limiting the interpretation.