Analysis of hat-p-16b and tres-3b exoplanets by the transition time change method

In this study, the transit observations of HAT-P-16b and TrES-3b exoplanets were carried out at the Ç.Ü. UZAYMER Observatory with a 50 cm Ritchey Chretien type telescope. System parameters for exoplanet and host star have been obtained by calculating weighted average with data analysis and modeling results. Some of these parameters for HAT-P-16 systems are: Mp=4.172 ± 0.163 MJ, Rp= 1.309 ± 0.111 RJ, M*=1.212 ± 0.002 M⊙, R*= 1.232 ± 0.001 R⊙ and [Fe/H] = + 0.165 ± 0.006 dex these parameters are compatible with the values given in Buchhave et al. (2010). The Mp=1.959 ± 0.111 MJ, Rp=1.306 ± 0.169 RJ, M*=0.947 ± 0.005 M⊙, R*= 0.819 ± 0.05 R⊙ and [Fe/H] = - 0.190 ± 0.001 dex parameters were calculated for the TrES-3 system. These values are also compatible with the values given in O'Donovan et al. (2007). No significant Transit Timing Variations (TTV) was found as a result of the Lomb-Scargle (LS) periodogram for HAT-P-16b by using the transit times obtained from tha transit light curves in the literatüre and open databases. However, a dominant period of 32.38 days and a secondary period of 41.07 days were determined as a result of the LS periodogram obtained from the TrES-3b data.