Micro Tidal Disruption Events in Active Galactic Nuclei
arXiv:2105.02342 · doi:10.3847/2041-8213/ac7c0b
Abstract
Active galactic nuclei (AGNs) can act as black hole assembly lines, funneling some of the stellar-mass black holes from the vicinity of the galactic center into the inner plane of the AGN disk where the black holes can merge through dynamical friction and gravitational wave emission. Here, we show that stars near the galactic center are also brought into the AGN disk, where they can be tidally disrupted by the stellar-mass black holes in the disk. Such micro-tidal disruption events (micro-TDEs) could be useful probe of stellar interaction with the AGN disk. We find that micro-TDEs in AGNs occur at a rate of Gpcyr. Their cleanest observational probe may be the detection of tidal disruption in AGNs by heavy supermassive black holes ( M) so that cannot tidally disrupt solar-type stars. We discuss two such TDE candidates observed to date (ASASSN-15lh and ZTF19aailpwl).
arXiv comment7 pages, 1 figure
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