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CATEGORIES:Galaxies Discussion Group
SUMMARY:Testing the Robustness of NANOGrav’s Gravitational
  Wave Background Signal - Paul Brook (University o
 f Birmingham)
DTSTART;TZID=Europe/London:20241018T113000
DTEND;TZID=Europe/London:20241018T123000
UID:TALK217999AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/217999
DESCRIPTION:Last year\, several collaborations reported eviden
 ce for a background of low-frequency gravitational
  waves pervading the universe. The most credible s
 ource of this gravitational wave background is a c
 osmological population of merging supermassive bla
 ck holes\, offering insights into the growth histo
 ry of the largest black holes in the universe. Add
 itionally\, the signal may also contain contributi
 ons from other processes in the early universe\, p
 otentially revealing new physics. The gravitationa
 l wave background was inferred by carefully observ
 ing an array of pulsars over many years. In this t
 alk\, I’ll explain the discovery\, and describe ou
 r efforts to test the consistency of the signal se
 en by the NANOGrav collaboration. By systematicall
 y 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
CONTACT:Sandro Tacchella
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