Looking For Timing Variations in the Transits of 16 Exoplanets

• Published in: arXiv.org
• Main Authors: Yalçınkaya, S, Esmer, E M, Baştürk, Ö, Muhaymin, A, Kutluay, A C, Silistre, D İ, Akar, F, Southworth, J, Mancini, L, Davoudi, F, Karamanlı, E, Tezcan, F, Demir, E, Yılmaz, D, Güleroğlu, E, Tekin, M, Taşkın, İ, Aladağ, Y, Sertkan, E, Kurt, U Y, Fişek, S, Kaptan, S, Aliş, S, Aksaker, N, Yelkenci, F K, Tezcan, C T, Kaya, A, Oğlakkaya, D, Aydın, Z S, Yeşilyaprak, C
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 26.03.2024
• Subjects: Ephemerides; Extrasolar planets; Ground-based observation; Light curve; Orbit decay; Periodic variations; Physics - Earth and Planetary Astrophysics; Transit; Transit time
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2403.17690

We update the ephemerides of 16 transiting exoplanets using our ground-based observations, new TESS data, and previously published observations including those of amateur astronomers. All these light curves were modeled by making use of a set of quantitative criteria with the EXOFAST code to obtain mid-transit times. We searched for statistically significant secular and/or periodic trends in the mid-transit times. We found that the timing data are well modeled by a linear ephemeris for all systems except for XO-2 b, for which we detect an orbital decay with the rate of -12.95 \(\pm\) 1.85 ms/yr that can be confirmed with future observations. We also detect a hint of potential periodic variations in the TTV data of HAT-P-13 b which also requires confirmation with further precise observations.