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SUMMARY:Testing the Robustness of NANOGrav’s Gravitational Wave Backgrou
 nd Signal - Paul Brook (University of Birmingham)
DTSTART:20241018T103000Z
DTEND:20241018T113000Z
UID:TALK217999@talks.cam.ac.uk
CONTACT:Sandro Tacchella
DESCRIPTION:Last year\, several collaborations reported evidence for a bac
 kground of low-frequency gravitational waves pervading the universe. The m
 ost credible source of this gravitational wave background is a cosmologica
 l population of merging supermassive black holes\, offering insights into 
 the growth history of the largest black holes in the universe. Additionall
 y\, the signal may also contain contributions from other processes in the 
 early universe\, potentially revealing new physics. The gravitational wave
  background was inferred by carefully observing an array of pulsars over m
 any years. In this talk\, I’ll explain the discovery\, and describe our 
 efforts to test the consistency of the signal seen by the NANOGrav collabo
 ration. By systematically removing pulsars from the pulsar array\, we stud
 ied how the recovered signal changed\, helping us to verify its robustness
 .\n
LOCATION:Ryle Seminar Room\, KICC + online
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