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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-3041
DTSTART:20130816T170000Z
DTEND:20130816T180000Z
DTSTAMP:20260419T211909Z
LAST-MODIFIED:20130813T124858Z
LOCATION:4421 Sterling Hall
SUMMARY:Towards 1% Measurements of Cosmological Distances with Cosmic 
 Sound\, Astronomy Colloquium\, Nikhil Padmanabhan\, YALE
DESCRIPTION:<br><br>
\nMeasuring the accelerated expansion of the Univ
 erse with the goal of better understanding its underlying physics is o
 ne of the leading programs in cosmology today. The baryon acoustic osc
 illation technique is one of the foremost tools in our toolbox today. 
 This talk will explain the underlying physics of this method and the r
 easons it is extremely robust to observational and theoretical systema
 tic errors. I will then present the latest results from the SDSS and B
 OSS surveys\, currently the most precise distance constraints from thi
 s method. These will include a new analysis technique to undo the effe
 cts of the nonlinear evolution of the density field and partially &quo
 t\;reconstruct&quot\; the initial density field. I will discuss the im
 plications of these measurements\, and will conclude by discussing pro
 spects for improvements in the immediate and not-so-immediate future.<
 br><br>
\n
URL:https://www.physics.wisc.edu/events/?id=3041
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