Cosmic slowing down of acceleration using $f_{gas}$

Abstract

We investigate the recent - low redshift - expansion history of the universe using the most recent observational data. Using only data from 42 measurements of $f_{gas}$ in clusters, we found that cosmic acceleration could have already peaked and we are witnessing now its slowing down. This effect, found previously by Shafieloo, Sahni and Starobinsky in 2010 using supernova data (at that time the Constitution SNIa sample) appears again using an independent observational probe. We also discuss the result using the most recent Union 2.1 data set.

6 pages, 4 figures

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• Dark energy and Dark matter interaction in light of the second law of thermodynamics
• A comprehensive investigation on the slowing down of cosmic acceleration
• Exploring hints for dark energy density evolution in light of recent data
• Testing cosmic acceleration for $w(z)$ parameterizations using $f_{gas}$ measurements in galaxy clusters
• Cosmological constraints from large-scale structure growth rate measurements
• An exponential equation of state of dark energy in the light of 2018 CMB Planck data
• Asymmetry in the reconstructed deceleration parameter
• Constancy of the Cluster Gas Mass Fraction in the R_h=ct Universe
• Constraints On Dark Energy Models From Galaxy Clusters and Gravitational Lensing Data
• Physical condition for the slowing down of cosmic acceleration
• Do current observations support transient acceleration of our universe?