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SUMMARY:Large-deviation statistics of the cosmic density field
DTSTART:20161121T140000
DTEND:20161121T150000
DTSTAMP:20260511T041921Z
UID:005a2f2bd778c0c205dd4c36f4299b23ed7c2478f02604f25a856d9d
CATEGORIES:Conferences - Seminars
DESCRIPTION:Cora Uhlemann (Utrecht U.)\nIn this talk\, I will describe how
  a large deviation principle can be used to follow the gravitational evolu
 tion of the large scale structure of matter in the Universe into the mildl
 y nonlinear regime. This approach allows for analytical predictions for co
 unts-in-cells statistics that are beyond what is commonly achievable via o
 ther statistics such as correlation functions. The idea is to determine th
 e mean cosmic densities within concentric spheres and to study their joint
  statistics. This symmetry allows to use spherical collapse dynamics which
  leads to surprisingly accurate predictions where standard perturbative ca
 lculations usually break down. In particular\, I will show results for the
  density and velocity statistics in concentric cells in comparison to stat
 e-of-the-art numerical simulations. Finally\, I will discuss current effor
 ts to extend the formalism to include primordial non-Gaussianity\, bias an
 d cylindrical cells and exploit its potential to constrain cosmology using
  future surveys.
LOCATION:Cubotron 727
STATUS:CONFIRMED
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