Looking for timing variations in the transits of 16 exoplanets
Abstract
We update the ephemerides of 16 transiting exoplanets using our groundbased 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 midtransit times. We searched for statistically significant secular and/or periodic trends in the midtransit times. We found that the timing data are well modelled by a linear ephemeris for all systems except for XO2 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 HATP13 b, which also requires confirmation with further precise observations.
 Publication:

Monthly Notices of the Royal Astronomical Society
 Pub Date:
 May 2024
 DOI:
 10.1093/mnras/stae854
 arXiv:
 arXiv:2403.17690
 Bibcode:
 2024MNRAS.530.2475Y
 Keywords:

 methods: observational;
 techniques: photometric;
 stars: individual: GJ 1214;
 HATP1;
 HATP10;
 HATP13;
 HATP16;
 HATP22;
 HATP30;
 HATP53;
 KELT3;
 QATAR2;
 WASP8;
 WASP44;
 WASP50;
 WASP77A;
 WASP93;
 and XO2;
 planetary systems;
 Astrophysics  Earth and Planetary Astrophysics
 EPrint:
 23 pages, 17 figures