ExoClock Project IV: A homogeneous catalogue of 620 updated exoplanet ephemerides
A. Kokori, A. Tsiaras, G. Pantelidou, A. Jones, A. Siakas, B. Edwards, G. Tinetti, A. W\"unsche, Y. Jongen, F. Libotte, M. Correa, L. V. Mugnai, A. Bocchieri, A. R. Capildeo, E. Poultourtzidis, C. Sidiropoulos, L. Bewersdorff, G. Lekkas, G. Grivas, R. A. Buckland

TL;DR
The ExoClock project compiled an updated, homogeneous catalogue of 620 exoplanet ephemerides by integrating diverse observational data, improving prediction accuracy, and identifying planets with TTVs, supporting future exoplanet research and space missions.
Contribution
This study provides the first comprehensive, integrated catalogue of exoplanet ephemerides combining ground, space, and literature data, with improved prediction accuracy and new TTV detections.
Findings
45% of planets required ephemeris updates
Order of magnitude improvement in prediction uncertainty
Identification of new TTV planets
Abstract
The ExoClock project is an open platform aiming to monitor exoplanets by integrating observations from space and ground based telescopes. This study presents an updated catalogue of 620 exoplanet ephemerides, integrating 30000 measurements from ground-based telescopes (the ExoClock network), literature, and space telescopes (Kepler, K2 and TESS). The updated catalogue includes 277 planets from TESS which require special observing strategies due to their shallow transits or bright host stars. This study demonstrates that data from larger telescopes and the employment of new methodologies such as synchronous observations with small telescopes, are capable of monitoring special cases of planets. The new ephemerides show that 45% of the planets required an update while the results show an improvement of one order of magnitude in prediction uncertainty. The collective analysis also enabled…
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Astro and Planetary Science
