期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 472, 期 1, 页码 439-446出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx1626
关键词
gravitational lensing: weak; cosmological parameters; large-scale structure of Universe; cosmology: observations
资金
- Department of Energy [DE-SC0011726]
We examine the cosmological information available from the 1-point probability density function (PDF) of the weak-lensing convergence field, utilizing fast L-PICOLA simulations and a Fisher analysis. We find competitive constraints in the Omega(m)-sigma(8) plane from the convergence PDF with 188 arcmin(2) pixels compared to the cosmic shear power spectrum with an equivalent number of modes (l < 886). The convergence PDF also partially breaks the degeneracy cosmic shear exhibits in that parameter space. A joint analysis of the convergence PDF and shear 2-point function also reduces the impact of shape measurement systematics, to which the PDF is less susceptible, and improves the total figure of merit by a factor of 2-3, depending on the level of systematics. Finally, we present a correction factor necessary for calculating the unbiased Fisher information from finite differences using a limited number of cosmological simulations.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据