Cosmological parameter estimation from CMB and X-ray cluster after Planck

. We investigate constraints on cosmological parameters in three 8-parameter models with the summed neutrino mass as a free parameter, by a joint analysis of CCCP X-ray cluster data, the newly released Planck CMB data as well as some external data sets including baryon acoustic oscillation measureme...

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Bibliographic Details
Published in:Journal of Cosmology and Astroparticle Physics
Main Authors: Hu, JW, Cai, RG, Guo, ZK, Hu, B, Hu, JW (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, POB 2735, Beijing 100190, Peoples R China.
Format: Report
Language:English
Published: 2014
Subjects:
Microwave Background Anisotropies
Baryon Acoustic-oscillations
Mass-temperature Relation
South-pole Telescope
Spt-sz Survey
Galaxy Clusters
Hubble Constant
Power Spectrum
Chandra Sample
Damping Tail
Physics
Hubble
South Pole
South pole
Online Access:http://ir.itp.ac.cn/handle/311006/15770
https://doi.org/10.1088/1475-7516/2014/05/020
Description
Summary:. We investigate constraints on cosmological parameters in three 8-parameter models with the summed neutrino mass as a free parameter, by a joint analysis of CCCP X-ray cluster data, the newly released Planck CMB data as well as some external data sets including baryon acoustic oscillation measurements from the 6dFGS, SDSS DR7 and BOSS DR9 surveys, and Hubble Space Telescope Ho measurement. We find that the combined data strongly favor a non-zero neutrino masses at more than 3 sigma confidence level in these non-vanilla models. Allowing the CMB lensing amplitude A(L) to vary, we find A(L) > 1 at 3 sigma confidence level. For dark energy with a constant equation of state w, we obtain w < -1 at 3 sigma confidence level. The estimate of the matter power spectrum amplitude 08 is discrepant with the Planck value at 2 sigma confidence level, which reflects some tension between X-ray cluster data and Planck data in these non-vanilla models. The tension can be alleviated by adding a 9% systematic shift in the cluster mass function.

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