19–23 Aug 2024
Nicolaus Copernicus Astronomical Center, Warsaw, Poland
Europe/Warsaw timezone

The ones that got away: formation and evolution of intermediate-mass black holes in massive star clusters

22 Aug 2024, 17:20
20m
Main Lecture Hall (Nicolaus Copernicus Astronomical Center, Warsaw, Poland)

Main Lecture Hall

Nicolaus Copernicus Astronomical Center, Warsaw, Poland

Bartycka 18, 00-716 Warsaw Poland
Talk Chris Belczynski memorial session on compact objects and gravitational wave source Chris Belczynski memorial session on compact objects and gravitational wave sources

Speaker

Benedetta Mestichelli (Gran Sasso Science Institute)

Description

Repeated stellar collisions and hierarchical mergers in dense and massive star clusters are among the most straightforward mechanisms to produce intermediate-mass black holes (IMBHs).
In my talk, I will investigate the formation channels of IMBHs in globular clusters up to $10^6\,\rm{M_{\odot}}$. To do this, I will rely on an extensive set of accurate N-body models run with the recently-developed $\mathtt{PeTar-MOBSE}$, which is uniquely conceived to integrate both stellar interactions and long-term dynamical evolution in massive and long-lived stellar clusters. I will show how the initial central densities and masses of the cluster affect the probability to form and retain an IMBH. Finally, I will discuss the peculiar impact of hierarchical mergers on the growth of IMBHs and the expected mass spectra of binary black hole mergers.

Affliation Gran Sasso Science Institute
Current Position PhD Student

Primary author

Benedetta Mestichelli (Gran Sasso Science Institute)

Co-authors

Prof. Michela Mapelli (Institut für Theoretische Astrophysik - Universität Heidelberg) Dr Sara Rastello (Institut de Ciènces del Cosmos - Universitat de Barcelona)

Presentation materials