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Looking for timing variations in the transits of 16 exoplanets

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


S Yalçınkaya

E M Esmer

Ö Baştürk

A Muhaymin

A C Kutluay

D İ Silistre

F Akar

L Mancini

F Davoudi

E Karamanlı

F Tezcan

E Demir

D Yılmaz

E Güleroğlu

M Tekin

İ Taşkın

Y Aladağ

E Sertkan

U Y Kurt

S Fişek

S Kaptan

S Aliş

N Aksaker

F K Yelkenci

C T Tezcan

A Kaya

D Oğlakkaya

Z S Aydın

C Yeşilyaprak


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 ± 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.

Journal Article Type Article
Acceptance Date Apr 5, 2024
Online Publication Date Apr 5, 2024
Deposit Date Apr 22, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Keywords Space and Planetary Science, Astronomy and Astrophysics