Program: GN-2019A-Q-120

When a star passes within a tidal radius of supermassive black hole, the star is disrupted and a half of the matter accretes into the black hole. This is known as tidal disruption event (TDE). Although TDE is of great importance to probe the demography of dormant supermassive black holes and stellar structure in the central region in the galaxy, a very limited number of TDE candidates was discovered for the last decades. More intriguingly, TDEs are preferentially found in post-starbust galaxies. Moreover, He II appears to be strong in TDE spectra, which are inconsistent with predictions from theoretical studies. We propose to monitor newly discovered TDEs with Gemini/GMOS, which will enable us to understand the underlying physics of accretion process, and probe the nature of TDEs.