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SUMMARY:One void\, many voids\, Swiss Cheese and no Dark Energy - Wessel V
 alkenburg (LAPTH &amp\; Aachen ITP)
DTSTART:20100125T130000Z
DTEND:20100125T140000Z
UID:TALK22677@talks.cam.ac.uk
CONTACT:Tasos Avgoustidis
DESCRIPTION:In cosmology\, the evidence for Dark Energy may be striking\, 
 but there still is a good number of reasons to consider alternative explan
 ations for the cosmological observations. The first convincing evidence fo
 r Dark Energy (DE) came from the observed distances to supernovae. I will 
 point out in what ways one can explain the supernovae without DE\, and I w
 ill focus on one particular model that does so: the Swiss-Cheese universe\
 , which is filled with voids and intermediate homogeneous matter. I will s
 how how the Swiss-Cheese toy model reveals severe difficulties for the inh
 omogeneous universe to explain away DE\, because of its implications for t
 he observed Cosmic Microwave Background. I will also briefly discuss the c
 losely related class of models\, in which we live in one local void in an 
 otherwise homogeneous universe.\n
LOCATION:CMS\, Pav.B\, CTC Common Room (B1.19)
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