GW8 - Dense stellar environments as sites of gravitational wave emission |
|
Speaker |
Mastrobuono Battisti, Alessandra |
|
Coauthors |
Tsatsi, Athanasia; Abbate, Federico; Perets, Hagai |
| Talk Title |
The assembly history of nuclear star clusters: black holes and pulsars |
|
Abstract |
Nuclear star clusters (NSCs) are dense stellar systems known to exist in galactic nuclei. 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 around a central supermassive black hole. 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 can imprint fossil records on its dynamical structure. In particular, we focus our attention on the millisecond pulsar distribution and its contribution to the gamma-ray excess at the Galactic Centre and we investigate the effects of stellar and intermediate-mass black holes on the build-up of the NSC. |
|
Talk view |
|
|
|
|