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SUMMARY:Insights into non-linear structure evolution from controlled linea
 r initial conditions - Andrew Pontzen (UCL)
DTSTART:20170130T130000Z
DTEND:20170130T140000Z
UID:TALK70094@talks.cam.ac.uk
CONTACT:47984
DESCRIPTION:Confronting data from current and forthcoming cosmological sur
 veys with theory requires an accurate understanding of non-linear gravitat
 ional evolution. Computer simulations are a vital tool for generating and 
 testing this understanding\, but suffer from a number of shortcomings. For
  example\, the finite CPU time available generates a tension between the n
 eed for large volumes and for high resolution. Additionally\, simulations 
 essentially operate as a “black box”\, generating only modest insight 
 into the actual physics determining the non-linear clustering. I will disc
 uss these shortcomings and show several new techniques designed to mitigat
 e them\, based on controlled modifications to the initial realisation of t
 he linear gaussian random overdensity field. (This talk will be based on a
 rXiv:1511.04090\, arXiv:1603.05253 and will touch briefly on arXiv:1607.02
 507)
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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