Searching for a holographic connection between dark energy and the low l CMB multipoles -: art. no. 004

被引:96
作者
Enqvist, K
Hannestad, S
Sloth, MS
机构
[1] Univ Helsinki, Helsinki Inst Phys, Dept Phys Sci, FIN-00014 Helsinki, Finland
[2] Univ So Denmark, Dept Phys, DK-5230 Odense, Denmark
[3] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA
来源
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2005年 / 02期
关键词
CMBR theory; dark energy theory; string theory and cosmology; cosmology of theories beyond the SM;
D O I
10.1088/1475-7516/2005/02/004
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We consider the angular power spectrum in a finite universe with different boundary conditions and perform a fit to the CMB, LSS and supernova data. A finite universe could be the consequence of a holographic constraint, giving rise to an effective IR cut-off at the future event horizon. In such a model there is a cosmic duality relating the dark energy equation of state and the power spectrum, which shows a suppression and oscillatory behaviour that is found to describe the low l features extremely well. However, much of the discussion here will also apply if we actually live inside an expanding bubble that describes our universe. The best fit to the CMB and LSS data turns out to be better than in the standard Lambda CDM model, but when combined with the supernova data, the holographic model becomes disfavoured. We speculate on the possible implications.
引用
收藏
页码:107 / 122
页数:16
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