Speaker
Description
Tidal disruption events (TDEs) have been thoroughly examined within the local universe using diverse observations and theoretical frameworks. However, the study of TDEs at high redshifts has been relatively scarce. The imminent launch of advanced high-resolution, wide-field surveys facilitated by telescopes such as LSST, Nancy Grace Roman Space Telescope (Roman) and Ultrasat is set to revolutionize our understanding of TDEs in the early universe. For the first time, we have explored the rates of TDEs and their correlation with various host galaxy properties across a wide redshift range (z=1-10) using the state-of-the-art cosmological zoom-in simulation FIRE-2. Unprecedented resolution of FIRE-2 provides realistic stellar density profiles at the galaxy centres, enabling accurate calculations of tidal disruption rates (TDR) using loss-cone theory. In this talk, I will discuss the key findings from our study, including the strong correlation of TDR with black hole and host galaxy mass, the connection between TDR and cosmic star formation history, and the potential for observing off-nuclear TDEs with LSST, Roman, and Ultrasat at different redshifts.