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SUMMARY:Toward General Relativistic Cosmological N-body Simulations - Davi
 d Daverio (University of Cambridge)
DTSTART:20190517T120000Z
DTEND:20190517T130000Z
UID:TALK123565@talks.cam.ac.uk
CONTACT:Nathan Johnson-McDaniel
DESCRIPTION:Cosmological n-body simulation are usually based on a Newtonia
 n treatment of gravity. The forthcoming large scale structure surveys will
  allow to reach sub-percent precision and therefore relativistic effect co
 uld become relevant.  This motivated the development of the first relativi
 stic n-body code\, gevolution. However\, if the gevolution  code is based 
 on a metric formulation of gravity\, it still work in a perturbative appro
 ach\, the weak field expansion. Therefore one could argue (and some do) th
 at gevolution cannot capture purely non-linear effects. This motivates the
  development of cosmological codes based on numerical relativity (NR). In 
 this talk\, the first NR n-body code able to evolve a pure dark matter uni
 verse from redshift 1000 to 0 will be presented. The difficulties of gener
 ating good initial condition will be discussed\, with a special attention 
 on  the momentum constraint.
LOCATION:Pavilion B Potter Room (B1.19)
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