期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 475, 期 1, 页码 532-542出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx3215
关键词
methods: numerical; cosmology: theory; large-scale structure of Universe
资金
- Japan Society for the Promotion of Science (JSPS)
- Advanced Leading Graduate Course for Photon Science
- JST CREST Grant [JPMJCR1414]
- JSPS [JP16J01512]
- NSF [AST-1412768]
- US Department of Energy [DE-AC02-06CH11357]
- Grants-in-Aid for Scientific Research [16J01512] Funding Source: KAKEN
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1412768] Funding Source: National Science Foundation
Recent detections of the cross-correlation of the thermal Sunyaev-Zel'dovich (tSZ) effect and weak gravitational lensing (WL) enable unique studies of cluster astrophysics and cosmology. In this work, we present constraints on the amplitude of the non-thermal pressure fraction in galaxy clusters, alpha(0), and the amplitude of the matter power spectrum, a 8, using measurements of the tSZ power spectrum from Planck, and the tSZ-WL cross-correlation from Planck and the Red Cluster Sequence Lensing Survey. We fit the data to a semi-analytic model with the covariance matrix using N-body simulations. We find that the tSZ power spectrum alone prefers sigma(8) similar to 0.85 and a large fraction of non-thermal pressure (alpha(0) similar to 0.2-0.3). The tSZ-WL cross-correlation on the other hand prefers a significantly lower sigma(8) similar to 0.6 and low alpha(0) similar to 0.05. We show that this tension can be mitigated by allowing for a steep slope in the stellar mass-halo mass relation, which would cause a reduction of the gas in low-mass haloes. In such a model, the combined data prefer sigma(8) similar to 0.7 and alpha(0) similar to 0.2, consistent with predictions from hydrodynamical 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