BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Abbas Askar (Lund U.) DTSTART:20210422T133000Z DTEND:20210422T143000Z DTSTAMP:20260423T021246Z UID:CENTRA/38 DESCRIPTION:Title: Black Hole Dynamics in Star Clusters: Evolution and Growth from Stellar to Supermassive Scales\nby Abbas Askar (Lund U.) as part of CENTRA Semin ar\n\n\nAbstract\nOver the past five years\, nearly fifty merging binary b lack holes have been discovered through the direct detection of gravitatio nal waves by the LIGO/Virgo collaboration. While these observations provid e unprecedented insights into the demographics of black holes\, they also raise important questions about the astrophysical origin and formation of these elusive binary systems. One of the formation channels for these obse rved gravitational wave sources are dynamical interactions in dense star c luster. In this talk\, I will describe how star clusters evolve and discus s the various processes by which merging binary black holes can form in th em based on results from state-of-the-art simulations of nearly two thousa nd stellar clusters. I will also give an overview of the main processes in volved in the retention and long-term evolution of black holes in star clu sters and explain how they shape the properties and merger rates for binar y black holes that originate in these dense stellar environments. Addition ally\, it has also been suggested that massive and dense star clusters cou ld be potential sites for forming black holes with masses between ~ 100 to 10\,000 solar masses. I will discuss the key processes and caveats involv ed in the formation\, retention and growth of these intermediate-mass blac k holes in the densest of star clusters. Finally\, I will discuss how star clusters that host intermediate-mass black holes can potentially end up i n the center of the galaxy where they may play a role in seeding the forma tion of supermassive black holes.\n LOCATION:https://researchseminars.org/talk/CENTRA/38/ END:VEVENT END:VCALENDAR