Cosmological constraints from gas mass fractions of massive, relaxed galaxy clusters

We present updated cosmological constraints from measurements of the gas mass fractions ($f_{gas}$) massive, dynamically relaxed galaxy clusters. Our new data set has greater leverage on models dark energy, thanks to addition Perseus Cluster at low redshifts, two clusters redshifts $z>0.97$, and significantly longer observations four $0.6<z<0.9$. low-redshift ($z<0.16$) $f_{gas}$ data, combined with cosmic baryon fraction measured microwave background (CMB), imply a Hubble constant $h = 0.722 \pm 0.067$. Combining full priors density constant, we constrain energy be $\Omega_\Lambda 0.865 0.119$ in non-flat $\Lambda$CDM (cosmological constant) models, its equation state $w -1.13_{-0.20}^{+0.17}$ flat, constant-w respectively 41 29 per cent tighter than our previous work, comparable best available other probes. $f_{gas}$, CMB, supernova, acoustic oscillation also global curvature evolving energy. For employed here, find scaling consistent an intrinsic scatter that corresponds just 3 distance.