Some observational consequences of brane world cosmologies

被引:73
作者
Alcaniz, JS [1 ]
机构
[1] Univ Washington, Dept Astron, Seattle, WA 98195 USA
关键词
D O I
10.1103/PhysRevD.65.123514
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The presence of dark energy in the Universe is inferred directly and indirectly from a large body of observational evidence. The simplest and most theoretically appealing possibility is the vacuum energy density (cosmological constant). However, although in agreement with current observations, such a possibility exacerbates the well known cosmological constant problem, requiring a natural explanation for its small, but nonzero, value. In this paper we focus our attention on another dark energy candidate, one arising from gravitational leakage into extra dimensions. We investigate observational constraints from current measurements of the angular size of high-z compact radio sources on accelerated models based on this large scale modification of gravity. The predicted age of the Universe in the context of these models is briefly discussed. We argue that future observations will enable a more accurate test of these cosmologies and, possibly, show that such models constitute a viable possibility for the dark energy problem.
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页数:6
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共 61 条
  • [11] COSMOLOGICAL CONSEQUENCES OF A TIME-DEPENDENT LAMBDA TERM
    CARVALHO, JC
    LIMA, JAS
    WAGA, I
    [J]. PHYSICAL REVIEW D, 1992, 46 (06): : 2404 - 2407
  • [12] Cosmology with x-matter
    Chiba, T
    Sugiyama, N
    Nakamura, T
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1997, 289 (02) : L5 - L9
  • [13] Cosmological phase transitions in a brane world
    Davis, SC
    Perkins, WB
    Davis, AC
    Vernon, IR
    [J]. PHYSICAL REVIEW D, 2001, 63 (08):
  • [14] Accelerated universe from gravity leaking to extra dimensions
    Deffayet, C
    Dvali, G
    Gabadadze, G
    [J]. PHYSICAL REVIEW D, 2002, 65 (04)
  • [15] Cosmology on a brane in Minkowski bulk
    Deffayet, C
    [J]. PHYSICS LETTERS B, 2001, 502 (1-4) : 199 - 208
  • [16] DEFFAYET C, ASTROPH0201164
  • [17] DEFFAYET C, ASTROPH0106449
  • [18] DEKEL A, 1997, CRITICAL DIALOGUES C
  • [19] Brane inflation
    Dvali, G
    Tye, SHH
    [J]. PHYSICS LETTERS B, 1999, 450 (1-3) : 72 - 82
  • [20] Gravity on a brane in infinite-volume extra space
    Dvali, G
    Gabadadze, G
    [J]. PHYSICAL REVIEW D, 2001, 63 (06):