Stellar Remnants in Galactic Nuclei: Mass Segregation

摘要: The study of how stars distribute themselves around a massive black hole (MBH) in the center galaxy is an important prerequisite for understanding many galactic-center processes. These include observed overabundance point X-ray sources at Galactic and prediction rates characteristics tidal disruptions extended by MBH inspirals compact into MBH, latter being events high importanceforthefuturespace-bornegravitationalwaveinterferometerLISA.Inrelativelysmallgalacticnucleihosting MBHs with masses range 10 5 –10 7 M� , single most dynamical process two-body relaxation. It induces formation steep density cusp strong mass segregation, as more loseenergytolighteronesand driftto thecentral regions. Usingaspherical stellardynamicalMonteCarlocode, we simulate long-term relaxational evolution galactic nucleus models spectrum stellar masses. Our focus concentration holes to immediate vicinity MBH. We quantify this segregation variety discuss its astrophysical implications. Special attention given developed match conditions Milky Way nucleus; examine presence objects connection recent high-resolution observations. Subject headingg physics — galaxies: nuclei star clusters gravitational waves methods: n-body simulations dynamics