BH2 - Theoretical and observational studies of astrophysical black holes |
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Speaker |
Mastrobuono Battisti, Alessandra |
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Coauthors |
Perets, Hagai; Tsatsi, Athanasia |
| Talk Title |
The assembly history of nuclear star clusters: supermassive, intermediate mass and stellar black-holes |
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Abstract |
Nuclear star clusters (NSCs) are dense stellar systems known to exist in galactic nuclei around supermassive black holes. Although their evolution is connected to that of the host galaxy, their origin is still unknown. Here we explore one of the possible formation channels in which globular clusters migrate to the center of the galaxy, disrupt and build up the NSC. We use several N-body simulations and models constrained by observations from the Milky Way to follow the formation and evolution of NSCs. We find that the simulated system can show properties that make it comparable with the Galactic NSC, including significant rotation, a fact that has been so far attributed to gas infall and in situ star formation. We explore the kinematic evolution of the simulated NSC to illustrate how the merger history and the presence of stellar black holes can imprint observable fossil records on its dynamical structure. Additionally, we discuss the effects of stellar and intermediate-mass black holes on the build-up of the NSC. |
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