Eight Exoplanet Candidates in SAO Survey

Abstract

We report eight new exoplanet candidates discovered at the Special Astrophysical Observatory of the Russian Academy of Sciences using the transit technique. Photometric observations were performed with a 50-cm robotic telescope during the second half of 2020. Transits with depths of $\Delta m=0\overset{\textrm{m}}{.}056{-}0\overset{\textrm{m}}{.}173$ and periods $P=18\overset{\textrm{h}}{.}8{-}8\overset{\textrm{d}}{.}3$ were detected in $m=14\overset{\textrm{m}}{.}3$–$18\overset{\textrm{m}}{.}8$ stars. All the stars considered are dwarfs with radii $R_{*}=0.4{-}0.6R_{\odot}$ (with an uncertainty of up to $1.1 R_{\odot}$ for a single star). We use simulations to estimate the candidate radii (all are greater than 1.4 times the Jovian radius), semi-major axes of their orbits (0.012–0.035 AU), and other orbital parameters. We report the transit light curves for two stars obtained in 2022 based on individual observations.