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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3305
DTSTART:20140321T190000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T193846Z
LAST-MODIFIED:20140319T174722Z
LOCATION:5280 Chamberlin Hall
SUMMARY:Consistency tests of gravity using large scale structure dynam
 ics\, Theory Seminar (High Energy/Cosmology)\, Elise Jennings\, Univer
 sity of Chicago
DESCRIPTION:Future galaxy spectroscopic surveys will make high precisi
 on measurements of the clustering of galaxies on scales in excess of 1
 00 Mpc/h. In particular\, the distortion of clustering due to the pecu
 liar motions of galaxies and the apparent scale of characteristic feat
 ures in the galaxy distribution have been proposed as tests of the cos
 mic acceleration. To obtain meaningful and robust constraints on dark 
 energy\, we need to understand any systematics in these measurements. 
 I will present the predictions for redshift space distortions from lar
 ge volume N-body simulations and discuss the accuracy of current model
 s in recovering the growth rate. In addition I will show predictions o
 f the clustering of dark matter in redshift space in f(R) modified gra
 vity and in quintessence dark energy cosmologies. Due to the size and 
 resolution of these simulations\, this is the first time that the nonl
 inear matter and velocity fields in this class of modified gravity mod
 els has been resolved to a high level of accuracy over a broad range o
 f scales. I will also discuss a galaxy infall kinematics model which\,
  in combination with weak lensing measurements\, can provide powerful 
 diagnostics of modified gravity.
URL:https://www.physics.wisc.edu/events/?id=3305
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