S18A0126abst
S18A0126
Detection of a Saturn-like ring around an exoplanet still remains as a distinctively attractive goal in the field. Their detection will deepen our understanding of formation scenarios of rings, which have been actively debated even in our Solar System. Recently, we conducted the first systematic survey of exoplanetary rings using the Kepler data, and found the first possible ringed planet around KIC 10403228. However, the detailed study also revealed other equally plausible scenarios for the ring-like signal. One is that the ring-like signal is caused by a low-mass star with a circumstellar disk eclipsing a giant star. The other considers a transiting binary planet instead of the ringed planet. The main difference among scenarios is the size of the host star, which will be estimated from the detailed study of the stellar spectra. In this sense, the follow-up observation of KIC 10403228 is obviously essential to confirm or refute the ring hypothesis. Even though KIC 1040322 is very faint, the HDS observation for several hours enables us to discriminate the scenarios for the possible ringed planet.
This document was translated from LATEX by HEVEA.