Constraints on neutrino masses from the study of the nearby large-scale structure and galaxy cluster counts

Abstract

The high precision measurements of the cosmic microwave background by the Planck survey yielded tight constraints on cosmological parameters and the statistics of the density fluctuations at the time of recombination. This provides the means for a critical study of structure formation in the Universe by comparing the microwave background results with present epoch measurements of the cosmic large-scale structure. It can reveal subtle effects such as how different forms of Dark Matter may modify structure growth. Currently most interesting is the damping effect of structure growth by massive neutrinos. Different observations of low redshift matter density fluctuations provided evidence for a signature of massive neutrinos. Here we discuss the study of the cosmic large-scale structure with a complete sample of nearby, X-ray luminous clusters from our REFLEX cluster survey. From the observed X-ray luminosity function and its reproduction for different cosmological models, we obtain tight constraints on the cosmological parameters describing the matter density, Omega_m, and the density fluctuation amplitude, sigma_8. A comparison of these constraints with the Planck results shows a discrepancy in the framework of a pure LambdaCDM model, but the results can be reconciled, if we allow for a neutrino mass in the range of 0.17 to 0.7 eV. Also some others, but not all of the observations of the nearby large-scale structure provide evidence or trends for signatures of massive neutrinos. With further improvement in the systematics and future survey projects, these indications will develop into a definitive measurement of neutrino masses.

10 pages, 4 figures

References in corpus (12)

• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• The Canadian Cluster Comparison Project: detailed study of systematics and updated weak lensing masses
• Stellar and total baryon mass fractions in groups and clusters since redshift 1
• Weighing the Giants IV: Cosmology and Neutrino Mass
• The Representative XMM-Newton Cluster Structure Survey (REXCESS) of an X-ray Luminosity Selected Galaxy Cluster Sample
• Neutrino cosmology and Planck
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Signs of neutrino mass in current cosmological datasets
• The extended ROSAT-ESO Flux Limited X-ray Galaxy Cluster Survey (REFLEX II) IV. X-ray Luminosity Function and First Constraints on Cosmological Parameters
• Banana Split: Testing the Dark Energy Consistency with Geometry and Growth
• Neutrino constraints: what large-scale structure and CMB data are telling us?
• The extended ROSAT-ESO Flux-Limited X-ray Galaxy Cluster Survey (REFLEX II) V. Exploring a local underdensity in the Southern Sky
• The extended ROSAT-ESO Flux-Limited X-ray Galaxy Cluster Survey (REFLEX II) VI. Effect of massive neutrinos on the cosmological constraints from clusters

Cited by in corpus (14)

• Cosmology Intertwined III: $f{\sigma }_8$ and $S_8$
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• The extended ROSAT-ESO Flux-Limited X-ray Galaxy Cluster Survey (REFLEX II) VII The Mass Function of Galaxy Clusters
• Cosmological search for sterile neutrinos after Planck 2018
• Cosmological Probes of Structure Growth and Tests of Gravity
• Search for GeV Gamma-Ray Emission from SPT-SZ selected Galaxy Clusters with 15 years of Fermi-LAT data
• Halo Growth and Merger Rates as a Cosmological Test
• Prospects for searching for sterile neutrinos with gravitational wave and $\gamma$-ray burst joint observations
• Multiwavelength classification of X-ray selected galaxy cluster candidates using convolutional neural networks
• A pilot search for MeV gamma-ray emission from five galaxy clusters using archival COMPTEL data
• Search for Dark Matter Annihilation to gamma-rays from SPT-SZ selected Galaxy Clusters
• Comparison of $\Lambda$CDM and $R_h=ct$ with updated galaxy cluster $f_{gas}$ measurements using Bayesian inference
• A Stacked Analysis of GeV Gamma-Ray Emission from SPT-SZ Galaxy Clusters with 16 Years of Fermi-LAT Data
• A MINOT-based Study of Gamma-ray emission from SPT-CL J2012-5649/Abell 3667