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SUMMARY: Searching for boson-star mergers in gravitational-wave data with 
 numerical relativity - Juan Calderon Bustillo\, University of Santiago de 
 Compostela
DTSTART:20230224T130000Z
DTEND:20230224T140000Z
UID:TALK196246@talks.cam.ac.uk
CONTACT:Isobel Romero-Shaw
DESCRIPTION: Gravitational-wave astronomy has delivered dramatic leaps for
 ward in our understanding of gravity\, astrophysics and our Universe at la
 rge. Despite this success\, we are yet to find evidence for one of the hol
 y grails for current scientific research: physics beyond General Relativit
 y (GR) and Standard Model of Particle Physics (SM). To this end\, ultra-li
 ght bosons are not only one of the simplest extensions of the SM but are a
 lso widely considered good candidates to build up part of Dark Matter. For
  this reason\, important efforts are being dedicated towards searching for
  these particles and\, specifically\, for the impact of boson clouds on bl
 ack holes. In this talk I will discuss an alternative strategy to look for
  these particles. In particular\, I will present the first systematic comp
 arison\, within the framework of Bayesian inference\, of LIGO-Virgo events
  to a signal model for a specific type of object beyond the SM\, namely a 
 set of nearly 1000 numerical simulations of mergers of exotic objects know
 n as (vector) boson-stars: self-gravitating condensates of ultralight boso
 ns. Also\, instead of using the canonical technique of analyzing the gravi
 tational-wave strain\, I will introduce a new data analysis strategy based
  on the direct usage of the Newman-Penrose scalar.
LOCATION:Potter room/Zoom
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