The gas depletion factor in galaxy clusters: implication from Atacama Cosmology Telescope Polarization experiment measurements

Abstract

The gas depletion factor $\gamma (z)$, i.e., the average ratio of the gas mass fraction to the cosmic mean baryon fraction of galaxy clusters, plays a very important role in the cosmological application of the gas mass fraction measurements. In this paper, using the newest catalog of 182 galaxy clusters detected by the Atacama Cosmology Telescope (ACT) Polarization experiment, we investigate the possible redshift evolution of $\gamma (z)$ through a new cosmology-independent method. The method is based on non-parametric reconstruction using the measurements of Hubble parameters from cosmic chronometers. Unlike hydrodynamical simulations suggesting constant depletion factor, our results reveal the trend of $\gamma (z)$ decreasing with redshift. This result is supported by a parametric model fit as well as by calculations on the reduced ACTPol sample and on the alternative sample of 91 SZ clusters reported earlier in ACT compilation. Discussion of possible systematic effects leaves an open question about validity of the empirical relation $M_{tot}$-$f_{gas}$ obtained on very close clusters. These results might pave the way to explore the hot gas fraction within large radii of galaxy clusters as well as its possible evolution with redshift, which should be studied further on larger galaxy cluster samples in the upcoming X-ray/SZ cluster surveys.

9 pages, 6 figures, 1 table. Comments welcome

References in corpus (14)

• Galaxy Clusters Discovered via the Sunyaev-Zel'dovich Effect in the 2500-square-degree SPT-SZ survey
• Cosmology and Astrophysics from Relaxed Galaxy Clusters II: Cosmological Constraints
• Nonparametric Dark Energy Reconstruction from Supernova Data
• X-ray and Sunyaev-Zel'dovich Effect Measurements of the Gas Mass Fraction in Galaxy Clusters
• Estimating cosmological parameters by the simulated data of gravitational waves from the Einstein Telescope
• The Atacama Cosmology Telescope: The Two-Season ACTPol Sunyaev-Zel'dovich Effect Selected Cluster Catalog
• Ultra-compact structure in intermediate-luminosity radio quasars: building a sample of standard cosmological rulers and improving the dark energy constraints up to $z\sim 3$
• The distance sum rule from strong lensing systems and quasars - test of cosmic curvature and beyond
• Testing the Etherington's distance duality relation at higher redshifts: the combination of radio quasars and gravitational waves
• Cosmological investigation of multi-frequency VLBI observations of ultra-compact structure in $z\sim 3$ radio quasars
• Testing cosmic acceleration for $w(z)$ parameterizations using $f_{gas}$ measurements in galaxy clusters
• Cosmological constraints on the gas depletion factor in galaxy clusters
• Is the non-isothermal double $\beta$-model incompatible with no time evolution of galaxy cluster gas mass fraction ?
• Statistical analysis with cosmic-expansion-rate measurements and two-point diagnostics

Cited by in corpus (11)

• Model-independent constraints on Lorentz invariance violation: implication from updated Gamma-ray burst observations
• Observational Constraints on $f(T)$ Gravity from Model-Independent Data
• A search for the variation of speed of light using galaxy cluster gas mass fraction measurements
• Exploring the "$L$--$\sigma$" relation of HII galaxies and giant extragalactic HII regions acting as standard candles
• Testing f(R) gravity with the simulated data of gravitational waves from the Einstein Telescope
• Testing the cosmic opacity at higher redshifts: implication from quasars with available UV and X-ray observations
• A test of the standard dark matter density evolution law using galaxy clusters and cosmic chronometers
• A low Hubble Constant from galaxy distribution observations
• A model-independent test of the evolution of gas depletion factor for SPT-SZ and Planck ESZ clusters
• A test of the evolution of gas depletion factor in galaxy clusters using strong gravitational lensing systems
• Comparison of $\Lambda$CDM and $R_h=ct$ with updated galaxy cluster $f_{gas}$ measurements using Bayesian inference