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In a dense stellar environment, such as the core of a globular cluster (GC),dynamical interactions with black holes (BHs) are expected to lead to a varietyof astrophysical transients. Here we explore tidal disruption events (TDEs) ofstars by stellar-mass BHs through collisions and close encounters. Usingstate-of-the-art $N$-body simulations, we show that these TDEs occur atsignificant rates throughout the evolution of typical GCs and we study howtheir relative rates relate to cluster parameters such mass and size. Byincorporating a realistic cosmological model of GC formation, we predict a BH -main-sequence-star TDE rate of approximately $3\,\rm{Gpc}^{-3}\,\rm{yr}^{-1}$in the local universe ($z<0.1$) and a cosmological rate that peaks at roughly$25\,\rm{Gpc}^{-3}\,\rm{yr}^{-1}$ for redshift 3. Furthermore, we show that theejected mass associated with these TDEs could produce optical transients ofluminosity $\sim 10^{41} - 10^{44}\rm\,erg\,s^{-1}$ with timescales of about aday to a month. These should be readily detectable by optical transient surveyssuch as the Zwicky Transient Facility. Finally, we comment briefly on BH -giant encounters and discuss how these events may contribute to the formationof BH - white-dwarf binaries.

Tidal Disruptions of Stars by Black Hole Remnants in Dense Star Clusters