The Transit Timing and Atmosphere of Hot Jupiter HAT-P-37b
Napaporn A-thano, Ing‐Guey Jiang, Supachai Awiphan, Ronnakrit Rattanamala, Li-Hsin Su, Torik Hengpiya, Devesh P. Sariya, Li‐Chin Yeh, A. A. Shlyapnikov, М. А. Горбачев, Alexey N. Rublevski, Vineet Kumar Mannaday, Parijat Thakur, D. K. Sahu, D. E. Mkrtichian, Evgeny Griv
Abstract
Abstract We perform transit timing variation (TTV) and transmission spectroscopy analyses of the planet HAT-P-37b, which is a hot Jupiter orbiting a G-type star. Nine new transit light curves are obtained and analyzed together with 21 published light curves from the literature. The updated physical parameters of HAT-P-37b are presented. The TTV analyses show a possibility that the system has an additional planet that induced the TTVs amplitude signal of 1.74 ± 0.17 minutes. If the body is located near the 1:2 mean-motion resonance orbit, the sinusoidal TTV signal could be caused by the gravitational interaction of a sub-Earth-mass planet with mass of 0.06 M ⊕ . From the analysis of an upper-mass limit for the second planet, a Saturn-mass planet with orbital period less than 6 days is excluded. The broadband transmission spectra of HAT-P-37b favors a cloudy atmospheric model with an outlier spectrum in the B filter.