The study on transiting systems HAT-P-13, HAT-P-16, and WASP-32 through combining ground-based and TESS photometry

ABSTRACT High-precision transit photometry supplies ideal opportunities for detecting new exoplanets and characterizing their physical properties, which usually encode valuable information unveiling the planetary structure, atmosphere, dynamical history. We present revised properties of three transiting systems (i.e. HAT-P-13, HAT-P-16, WASP-32) through analyzing TESS ground-based observations, were obtained at 1-m 2.4-m telescopes Yunnan Observatories, China, 1.2-m telescope Hamburg Observatory, Germany, as well data in literature. During modelling light curves, Gaussian process is employed to account potential systematic errors. Through comprehensive timing analysis, we find that both HAT-P-13b HAT-P-16b show significant variations (TTVs) can be explained by apsidal precession. TTVs WASP-32b may led a decaying orbit due tidal dissipation or However, current observations not rule out origins systems’ from gravitational perturbations close companions conclusively.