Density of cold dark matter
Density of cold dark matter
复制标题
冷暗物质的密度
DOI：
10.1103/physrevd.66.041301
复制
发表时间：
2002
影响因子：
5
通讯作者：
J. Silk
中科院分区：
文献类型：
--
作者：
A. Melchiorri;J. Silk
暗物质的性质越来越受到宇宙学数据的限制。在本文中，我们研究了宇宙微波背景各向异性极限在不同理论假设和数据集组合下对冷暗物质密度的影响。我们推断约束$\Omega_{cdm}h^2=0.12\pm0.04$(在95% c.l.). The CDM models are compared with the shape of the linear matter power spectrum inferred from the 2dF galaxy redshift survey and with the rms mass fluctuations from recent local cluster observations. We found that a value of $\sigma_8 \sim 1$ as suggested by recent cosmic shear data is not favoured by the CMB data alone nor by combined CMB+SN-Ia, CMB+HST or CMB+2dFGRS analyses. We also extrapolate our bounds on the rms linear mass fluctuations to sub-galactic scales and compare them with recent lensing constraints, finding agreement with the standard $\Lambda$CDM model.
The nature of dark matter is increasingly constrained by cosmological data. In this paper, we examine the implications of the Cosmic Microwave Background anisotropy limits on the density of cold dark matter under different theoretical assumptions and combinations of datasets. We infer the constraint $\Omega_{cdm}h^2=0.12\pm0.04$ (at 95% c.l.). The CDM models are compared with the shape of the linear matter power spectrum inferred from the 2dF galaxy redshift survey and with the rms mass fluctuations from recent local cluster observations. We found that a value of $\sigma_8 \sim 1$ as suggested by recent cosmic shear data is not favoured by the CMB data alone nor by combined CMB+SN-Ia, CMB+HST or CMB+2dFGRS analyses. We also extrapolate our bounds on the rms linear mass fluctuations to sub-galactic scales and compare them with recent lensing constraints, finding agreement with the standard $\Lambda$CDM model.
Be/X 射线双星中中子星周围吸积盘的形成
DOI：
--
发表时间：
2004
期刊：
Monthly Notices of the Royal Astronomical Society 350
影响因子：
--
作者：
K.Hayasaki;A.T.Okazaki
通讯作者：
A.T.Okazaki