Searching for Candidates of Orbital Decays among Transit Exoplanets

Abstract

Transit observations have become an important technique to probe exoplanets. Therefore, there are many projects carrying on organized observations of transit events, which make a huge amount of light-curve and transit timing data available. We consider this as an excellent opportunity to search for possible orbital decays of exoplanets from this big number of mid-transit times through data-model fitting with both fixed-orbit and orbit-decay models. In order to perform this task, we collect mid-transit-time data from several sources and construct the most complete database up to date. Among 144 hot Jupiters in our study, HAT-P-51b, HAT-P-53b, TrES-5b, WASP-12b are classified as the orbit-decay cases. Thus, in addition to reconfirming WASP-12b as an orbit-decay planet, our results indicate that HAT-P-51b, HAT-P-53b, TrES-5b are potential orbit-decay candidates.

arXiv comment12 pages, 5 figures, 5 tables, accepted by New Astronomy

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Cited by in corpus (5)

• Simultaneous multicolour transit photometry of hot Jupiters HAT-P-19b, HAT-P-51b, HAT-P-55b, and HAT-P-65b
• Doomed Worlds II: Reassessing Suggestions of Orbital Decay for TrES-5 b
• TrES-1 b: A Case Study in Detecting Secular Evolution of Exoplanet Orbits
• Observational imprints of tidal internal gravity wave dissipation in star-planet systems
• Transit Timing Variations of the Sub-Saturn Exoplanet HAT-P-12b