Testing Einstein gravity with cosmic growth and expansion
Zhao, GB; Li H(李虹); Li, H; Linder, EV; Koyama, K; Bacon, DJ; Zhang, XM; Zhang XM(张新民)
刊名PHYSICAL REVIEW D
2012
卷号85期号:12页码:123546
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.85.123546
英文摘要We test Einstein gravity using cosmological observations of both expansion and structure growth, including the latest data from supernovae (Union2.1), cosmic microwave background (WMAP7), weak lensing (CFHTLS) and the peculiar velocity of galaxies (WiggleZ). We fit modified gravity parameters of the generalized Poisson equations simultaneously with the effective equation of state for the background evolution, exploring the covariances and model dependence. The results show that general relativity is a good fit to the combined data. Using a Pade approximant form for the gravity deviations accurately captures the time and scale dependence for theories like f(R) and DGP gravity, and weights high and low redshift probes fairly. For current observations, cosmic growth and expansion can be fit simultaneously with little degradation in accuracy, while removing the possibility of bias from holding one aspect fixed.
收录类别SCI
WOS记录号WOS:000305828400001
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被引频次:34[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224639
专题中国科学院高能物理研究所_理论物理室_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
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Zhao, GB,Li H,Li, H,et al. Testing Einstein gravity with cosmic growth and expansion[J]. PHYSICAL REVIEW D,2012,85(12):123546.
APA Zhao, GB.,李虹.,Li, H.,Linder, EV.,Koyama, K.,...&张新民.(2012).Testing Einstein gravity with cosmic growth and expansion.PHYSICAL REVIEW D,85(12),123546.
MLA Zhao, GB,et al."Testing Einstein gravity with cosmic growth and expansion".PHYSICAL REVIEW D 85.12(2012):123546.
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