S18B0090abst

S18B0090

We propose 2-night Standard Target-Of-Opportunity (SToO) optical spectroscopic and imaging follow-up observations with Gemini-N/GMOS to (i) spectroscopically identify tidal disruption event (TDE) candidates found in our coming (approved) Subaru/HSC transient survey in the SXDS field, (ii) investigate the host galaxy properties, and (iii) study black hole-host galaxy relations in the low-mass regime at high redshifts (0.2<∼ z<∼1.0). TDEs, in general, are preferably hosted by lower-mass black holes (BHs; ∼10⁶ M_⊙) and a useful tool to study BH-host galaxy relation without being affected by luminous AGN. Our selection criteria were well established and a convincing candidate was found in our 2016-2017 HSC transient survey in the COSMOS field. Our coming HSC transient survey in the SXDS field, which will be the final systematic transient survey within the HSC-SSP, will be done in the S18B semester and a few TDEs are expected to be discovered.

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