期刊
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
卷 -, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2016/02/001
关键词
dark matter simulations; cosmological parameters from LSS; weak gravitational lensing
资金
- Villum Fonden [00011115] Funding Source: researchfish
The effects of local inhomogeneities on low redshift H-0 determinations are studied by estimating the redshift-distance relation of mock sources in N-body simulations. The results are compared to those obtained using the standard approach based on Hubble's law. The comparison shows a clear tendency for the standard approach to yield lower values of H-0 than the approach based on the scheme using light rays. The difference is, however, small. More precisely, it is found that the overall effect of inhomogeneities on the determination of H-0 is a small increase in the local estimates of about 0.3% compared to the results obtained with Hubble's law, when based on a typical distribution of supernovae in the redshift range 0.01 < z < 0.1. The overall conclusion of the study is a verification of the results that have earlier been obtained by using Hubble's law: the effects of inhomogeneities on local H-0 estimates are not significant enough to make it plausible that differences in high- and low-redshift estimates of H-0 are due to small inhomogeneities within the setting of standard cosmology.
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