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Session: Stars, Planets and the Interstellar Medium

Name: Mr. Dionysios Gakis (University of Patras)
Coauthors: Poultourtzidis Efthymios (Aristotle University of Thessaloniki)
Pantelidou Georgia (Freie Universität Berlin)
Kokori Anastasia (University College London)
Tsiaras Angelos (University College London)
Bewersdorff Leon (Fairborn Institute)
Iliadou Anastasia (Aristotle University of Thessaloniki)
Lekkas Georgios (University of Ioannina)
Sidiropoulos Chrysostomos (University of Ioannina)
Type: Poster
Title: Transit Timing Variations in exoplanetary systems through the ExoClock Project
Abstract:

The ExoClock project is a platform that monitors the ephemerides of transiting exoplanets, with the purpose to provide a verified list of them for the upcoming ESA's M4 mission, Ariel, scheduled for launched in 2029. The project also offers a useful service for the wider working community, since it can give valuable information about the best timings for future observations. To this end, a large dataset of individual transits has been examined, including observations with space telescopes (Kepler, K2, TESS), ground-based observations and mid-time values from literature. This poster will emphasize on the latter aspect and will discuss the opportunities provided by ExoClock to utilize the project’s database for further research. More specifically, we search for non-linear patterns in planetary ephemerides and combine them with other physical properties (like possible resonances) for a number of exoplanetary systems. A fundamental Transit Timing Variations (TTVs) analysis of those has been performed and the results will be presented. These results include the estimation of the non-linear terms along with the underlying uncertainties. Additionally, as ExoClock is a pro-am collaboration, this work will also highlight the contribution of the amateur astronomers to the observations and the power of collaborative work produced by volunteers.