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SUMMARY:The relativistic galaxy bispectrum
DTSTART;VALUE=DATE-TIME:20220923T081000Z
DTEND;VALUE=DATE-TIME:20220923T091000Z
DTSTAMP;VALUE=DATE-TIME:20260516T013621Z
UID:indico-contribution-932@events.ncbj.gov.pl
DESCRIPTION:Speakers: Chris Clarkson ( University of London )\nThe galaxy 
 bispectrum will play an important role for future galaxy surveys. On large
  scales it will be a key probe for measuring primordial non-Gaussianity\, 
 and hence help discriminate between different inflationary models and othe
 r theories of the early universe. On these scales\, a variety of relativis
 tic effects come into play once the galaxy number-count fluctuation is pro
 jected onto the past light cone. The Fourier-space galaxy bispectrum is co
 mplex\, with the imaginary part arising from leading-order relativistic co
 rrections. Detection of the imaginary part is potentially a smoking gun si
 gnal of relativistic contributions. We will discuss whether next-generatio
 n surveys could make such a detection. Further\, We will discuss the decom
 position of the bispectrum into invariant multipoles about the observer’
 s line of sight\, and examine in detail how the relativistic effects contr
 ibute to these.\n\nhttps://events.ncbj.gov.pl/event/152/contributions/932/
LOCATION:Banach Center IMPAN 321
URL:https://events.ncbj.gov.pl/event/152/contributions/932/
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