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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 731917.0, MPI für Astronomie / Publikationen_mpia
Simulating the mass assembly history of nuclear star clusters through globular cluster mergers
Authors:Mastrobuono-Battisti, A.; Tsatsi, A.; Perets, H. B.
Date of Publication (YYYY-MM-DD):2016
Title of Journal:Memorie della Societa Astronomica Italiana
Start Page:626
End Page:629
Audience:Not Specified
Abstract / Description:Nuclear star clusters (NSCs) are dense, collisional, stellar systems observed in galactic nuclei, often hosting a central massive black hole (MBH). Although there is a close connection between their evolution and that of their host galaxies, the formation mechanism of NSCs is still unknown. Here we explore the merger scenario, in which GCs inspiral to the galactic nucleus building-up the NSC, by means of constrained N-body simulations, using parameters appropriate for the Milky Way. When intermediate mass black holes (IMBHs) are present inside the infalling clusters, once decayed to the galactic center, they act as massive-perturbers that boost the stellar tidal disruption event (TDE) rate. For the first time, we generate 2D mock stellar mass and kinematic maps that can be directly compared to observed NSCs. Our simulated cluster exhibits many of the features of the Galactic NSC, including its rotation (especially in runs with no IMBHs), suggesting that the merger scenario could have a significative role in the formation of NSCs.
Free Keywords:galaxies: bulges; galaxies: kinematics and dynamics; galaxies: nuclei; galaxies: center; Galaxy: evolution; Galaxy: formation; methods: numerical
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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