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CATEGORIES:Cosmology Lunch
SUMMARY:Probability distribution of astrophysical gravitat
ional-wave background fluctuations - Barry Ginat (
Oxford)
DTSTART;TZID=Europe/London:20231106T130000
DTEND;TZID=Europe/London:20231106T140000
UID:TALK204409AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/204409
DESCRIPTION:The coalescence of compact binary stars is expecte
d to produce a stochastic background of gravitatio
nal waves (GW) observable with future GW detectors
. In this talk\, I’ll present a method to calculat
e the full probability distribution of strain fluc
tuations\, which contains more information than th
e GW energy density (the second moment). I will de
scribe applications both for time series data and
a frequency-domain analysis. I’ll illustrate how t
his probability distribution can be evaluated nume
rically\, and\, additionally\, derive accurate ana
lytic asymptotic expressions for the large strain
tail\, demonstrating that it is dominated by the n
earest source\, and that it exhibits a universal p
ower-law decline. I will also discuss to what exte
nt the background may be treated as Gaussian\, and
how the accuracy of this approximation varies wit
h frequency.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Roo
m]
CONTACT:Dr Dong-Gang Wang
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