The physical parameters of exoplanetary system play extremely important role in understanding the formation and evolution of the exoplanetary system. The study for exoplanetary systems provides more samples for understanding our solar system. The photometric observation for the transit event of the exoplanet is one of the most significant methods to obtain the planetary physical parameters. Through the analysis of the light curve of an exoplanet transit, the radius and the orbital inclination of the exoplanet can be derived. The mass and other physical parameters of the exo- planet can be inferred through combining the radial velocity data with the transit light curve data. These parameters are very important to understand its structure, formation and evolution. Additionally, the transit timing variation(TTV) and transit duration variation(TDV) of an exoplanet can be taken advantage to probe other unveiled bodies in the same system. Photometric observations for transit events ofWASP-32b were carried out by uti- lizing 1-m telescope of Yunnan Observatories and 0.5-m telescope of Hokoon Nature Education cum Astronomical Centre of Hong Kong from 2010 to 2012. The system- atic errors in the photometric data were eliminated with the coarse de-correlation and SYSREM methods so as to enhance the transit feature. Combined with the radial ve- locity data presented in literature, our newly observed data and the earlier photometric data in the literature are simultaneously analyzed to derive the physical parameters of the system by employing the Markov Chain Monte Carlo(MCMC) technique. In com- parison with previous results, our results confirm thatWASP-32b’s orbit is circular. We have solved the issue that the previous results didn’t agree with each other. Through the analysis of all available mid-transit times of symmetric and complete light curves, we have refined the orbital period of WASP-32b, no evident transit timing variation is found in these transit events.
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