Fast Optical Transients from Stellar-mass Black Hole Tidal Disruption Events in Young Star Clusters

Abstract Observational evidence suggests that the majority of stars may have been born in stellar clusters or associations. Within these dense environments, dynamical interactions lead to high rates close encounters. A variety recent observational and theoretical indications suggest stellar-mass black holes be present play an active role all masses. In this study, we explore tidal disruption main-sequence by young star clusters. We compute a suite over 3000 independent N -body simulations cover range cluster mass, metallicity, half-mass radii. find hole events (TDEs) occur at overall rate up roughly 200 Gpc ?3 yr ?1 local universe. These TDEs are expected several characteristic features, namely, fast rise times order day, peak X-ray luminosities least 10 44 erg s , bright optical (roughly 41 –10 ) associated with reprocessing disk wind. particular, show share many features common emerging class Fast Blue Optical Transients.