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SUMMARY:Hierarchical mergers as tracers of globular cluster formation hist
 ory
DTSTART;VALUE=DATE-TIME:20260705T074500Z
DTEND;VALUE=DATE-TIME:20260705T080000Z
DTSTAMP;VALUE=DATE-TIME:20261027T101219Z
UID:indico-contribution-806@indico.narit.or.th
DESCRIPTION:Speakers: Andris Dorozsmai (National Astronomical Observatory 
 of Japan)\nThe origin of globular clusters remains one of the most importa
 nt open questions in astrophysics\, with essential implications for our un
 derstanding of galaxy formation and the early Universe. \n\nGlobular clust
 ers are unique sites of hierarchical black hole mergers\, where the remnan
 t of a previous merger undergoes a subsequent coalescence\, a process only
  expected in the dense dynamical environments of stellar clusters. These m
 ergers have distinct properties compared to binary black holes formed in i
 solated environments\, making them promising candidates to be clearly iden
 tified in future observations.\n\nUsing population synthesis models of gra
 vitational wave sources in globular clusters\, I show that the hierarchica
 l merger rate directly traces the cluster formation history. Adopting a mo
 del for the delay time\, defined as the time between cluster formation and
  the eventual black hole merger\, I demonstrate that the globular cluster 
 formation history can be accurately inferred from hierarchical merger cata
 logues of third-generation detectors using a non-parametric Bayesian frame
 work. This will constrain the cluster formation history to unprecedented a
 ccuracy\, shedding light on the cluster formation efficiency across cosmic
  time\, the role of globular clusters in cosmic reionization\, and the phy
 sical conditions of high-redshift star formation. Third-generation detecto
 rs will therefore be unique probes of globular cluster formation and high-
 redshift star formation\, complementing observatories such as JWST\, Eucli
 d\, and the ELT.\n\nhttps://indico.narit.or.th/event/236/contributions/806
 /
LOCATION:National Astronomical Research Institute of Thailand (NARIT) Andr
 omeda Meeting Room
URL:https://indico.narit.or.th/event/236/contributions/806/
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