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SUMMARY:Cosmology from Non-Gaussian fields - Daan Meerburg (University of 
 Groningen)
DTSTART:20240429T120000Z
DTEND:20240429T130000Z
UID:TALK209593@talks.cam.ac.uk
CONTACT:Fiona McCarthy
DESCRIPTION:In this talk I will discuss several challenges towards detecti
 ng primordial non-Gaussianties. With the CMB running out of modes\, we hav
 e started focussing on large scale structure. Measurements of the 21cm bri
 ghtness temperature allow us to observe almost our entire past light cone.
  Based on comoving volume arguments\, the epoch starting during the dark a
 ges and ending the epoch of reionzation (EoR) potentially contain a lot of
  modes. Besides being hard to detect\, even at these high redshifts\, when
  modes were more linear\, I will argue both signal confusion and non-Gauss
 ian covariance have to be considered. During the EoR\, the tracer field is
  very non-Gaussian and standard summary statistics might no longer suffice
 . I will discuss how machine learning could help solving some of these cha
 llenges\, while also benefiting efforts to understand astrophysical evolut
 ion during these epochs. Finally\, ML applications in cosmology are rapidl
 y developing. We should remain cautious and apply common sense. I will dis
 cuss an example of what could happen if we don’t. 
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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