Impacts on cosmological constraints from degeneracies
文献类型：期刊论文
| 作者 | Li H(李虹) ; Xia JQ(夏俊卿); Li, H; Xia, JQ
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| 刊名 | JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
 |
| 出版日期 | 2012 |
| 期号 | 11页码:39 |
| 关键词 | dark energy experiments cosmological parameters from CMBR |
| 英文摘要 | In this paper, we study the degeneracies among several cosmological parameters in detail and discuss their impacts on the determinations of these parameters from the current and future observations. By combining the latest data sets, including type-I a supernovae "Union2.1" compilation, WMAP seven-year data and the baryon acoustic oscillations from the SDSS Data Release Seven, we perform a global analysis to determine the cosmological parameters, such as the equation of state of dark energy w, the curvature of the universe Omega(k), the total neutrino mass Sigma m(v), and the parameters associated with the power spectrum of primordial fluctuations (n(s), alpha(s) and r). We pay particular attention on the degeneracies among these parameters and the influences on their constraints, by with or without including these degeneracies, respectively. We find that w and Omega(k) or Sigma m(v) are strongly correlated. Including the degeneracies will significantly weaken the constraints. Furthermore, we study the capabilities of future observations and find these degeneracies can be broken very well. Consequently, the constraints of cosmological parameters can be improved dramatically. |
| 学科主题 | Astronomy & Astrophysics; Physics |
| 收录类别 | SCI |
| WOS记录号 | WOS:000312263500022 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/224396]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 推荐引用方式 GB/T 7714 | Li H,Xia JQ,Li, H,et al. Impacts on cosmological constraints from degeneracies[J]. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS,2012(11):39. |
| APA | 李虹,夏俊卿,Li, H,&Xia, JQ.(2012).Impacts on cosmological constraints from degeneracies.JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS(11),39. |
| MLA | 李虹,et al."Impacts on cosmological constraints from degeneracies".JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS .11(2012):39. |
入库方式： OAI收割
来源：高能物理研究所
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