Looking for timing variations in the transits of 16 exoplanets

Yalçlnkaya, S.; ESMER, EKREM; BAŞTÜRK, ÖZGÜR; Muhaymin, A.; Kutluay, A.C.; Silistre, D.I.; Akar, F.; Southworth, J.; Mancini, L.; Davoudi, F.; Karamanll, E.; Tezcan, F.; Demir, E.; Yllmaz, D.; Güleroǧlu, E.; Tekin, M.; Taşkln, I.; Aladaǧ, Y.; Sertkan, E.; Kurt, U.Y.; Fişek, S.; Kaptan, S.; Aliş, S.; Aksaker, N.; Yelkenci, F.K.; Tezcan, C.T.; Kaya, A.; Oǧlakkaya, D.; Aydln, Z.S.; Yeşilyaprak, C.

doi:10.1093/mnras/stae854

Looking for timing variations in the transits of 16 exoplanets

Yalçlnkaya S., ESMER E. M., BAŞTÜRK Ö., Muhaymin A., Kutluay A., Silistre D., ...More

Monthly Notices of the Royal Astronomical Society, vol.530, no.3, pp.2475-2495, 2024 (SCI-Expanded, Scopus)

Publication Type: Article / Article
Volume: 530 Issue: 3
Publication Date: 2024
Doi Number: 10.1093/mnras/stae854
Journal Name: Monthly Notices of the Royal Astronomical Society
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Compendex, INSPEC, Metadex, zbMATH, DIALNET, Civil Engineering Abstracts
Page Numbers: pp.2475-2495
Keywords: methods: observational, planetary systems, stars: individual: GJ 1214, HAT-P-1, HAT-P-10, HAT-P-13, HAT-P-16, HAT-P-22, HAT-P-30, HAT-P-53, KELT-3, QATAR-2, WASP-8, WASP-44, WASP-50, WASP-77A, WASP-93, and XO-2, techniques: photometric
Open Archive Collection: AVESIS Open Access Collection
Middle East Technical University Affiliated: Yes

Abstract

We update the ephemerides of 16 transiting exoplanets using our ground-based observations, new Transiting Exoplanet Survey Satellite data, and previously published observations including those of amateur astronomers. All these light curves were modelled 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 modelled 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 ± 1.85 ms yr-1 that can be confirmed with future observations. We also detect a hint of potential periodic variations in the transit timing variation data of HAT-P-13 b, which also requires confirmation with further precise observations.