The transit timing variation (TTV) and transmission spectroscopy analyses of the planet HAT-P-37b, which is a hot Jupiter orbiting an G-type star, were performed. Nine new transit light curves are obtained and analysed 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 which 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, the Saturn mass planet with orbital period less than 6 days is excluded. The broad-band transmission spectra of HAT-P-37b favours a cloudy atmospheric model with an outlier spectrum in B-filter.
@article{arxiv.2112.04724,
title = {The Transit Timing and Atmosphere of Hot Jupiter HAT-P-37b},
author = {Napaporn A-thano and Ing-Guey Jiang and Supachai Awiphan and Ronnakrit Rattanamala and Li-Hsin Su and Torik Hengpiya and Devesh P. Sariya and Li-Chin Yeh and A. A. Shlyapnikov and Mark A. Gorbachev and Alexey N. Rublevski and Vineet Kumar Mannaday and Parijat Thakur and D. K. Sahu and David Mkrtichian and Evgeny Griv},
journal= {arXiv preprint arXiv:2112.04724},
year = {2022}
}