Testing Einstein gravity with cosmic growth and expansion
文献类型：期刊论文
| 作者 | Zhao, Gong-Bo1,2 ; Li, Hong3,4; Linder, Eric V.5,6,7; Koyama, Kazuya2; Bacon, David J.2; Zhang, Xinmin3,4
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| 刊名 | PHYSICAL REVIEW D
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| 出版日期 | 2012-06-29 |
| 卷号 | 85期号:12 |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000305828400001 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/6343]  |
| 专题 | 国家天文台_星系宇宙学研究部 |
| 作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 3FX, Hants, England 3.Chinese Acad Sci, Inst High Energy Phys, Div Theoret Phys, Beijing 100049, Peoples R China 4.Chinese Acad Sci, TPCSF, Beijing 100049, Peoples R China 5.Univ Calif Berkeley, Berkeley, CA 94720 USA 6.Berkeley Lab, Berkeley, CA 94720 USA 7.Ewha Womans Univ, Inst Early Universe WCU, Seoul, South Korea |
| 推荐引用方式 GB/T 7714 | Zhao, Gong-Bo,Li, Hong,Linder, Eric V.,et al. Testing Einstein gravity with cosmic growth and expansion[J]. PHYSICAL REVIEW D,2012,85(12). |
| APA | Zhao, Gong-Bo,Li, Hong,Linder, Eric V.,Koyama, Kazuya,Bacon, David J.,&Zhang, Xinmin.(2012).Testing Einstein gravity with cosmic growth and expansion.PHYSICAL REVIEW D,85(12). |
| MLA | Zhao, Gong-Bo,et al."Testing Einstein gravity with cosmic growth and expansion".PHYSICAL REVIEW D 85.12(2012). |
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来源：国家天文台
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