English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In recent years, the availability of large, complete cluster samples hasenabled numerous cosmological parameter inference analyses using cluster numbercounts. These have provided constraints on the cosmic matter density $\Omega_m$and the amplitude of matter density fluctuations $\sigma_8$ alternative tothose obtained from other standard probes. However, systematics uncertainties,such as the mass calibration bias and selection effects, may stillsignificantly affect these data analyses. Hence, it is timely to explore otherproxies of galaxy cluster cosmology that can provide cosmological constraintscomplementary to those obtained from cluster number counts. Here, we usemeasurements of the cluster sparsity from weak lensing mass estimates of theLC$^2$-{\it single} and HSC-XXL cluster catalogs to infer constraints on a flat$\Lambda$CDM model. The cluster sparsity has the advantage of being insensitiveto selection and mass calibration bias. On the other hand, it primarilyconstrains a degenerate combination of $\Omega_m$ and $\sigma_8$ (alongapproximately constant curves of $S_8=\sigma_8\sqrt{\Omega_m/0.3}$), and toless extent the reduced Hubble parameter $h$. Hence, in order to break theinternal parameter degeneracies we perform a combined likelihood analysis ofcluster sparsities with cluster gas mass fraction measurements and BAO data. Wefind marginal constraints that are competitive with those from other standardcosmic probes: $\Omega_m=0.316\pm 0.013$, $\sigma_8=0.757\pm 0.067$(corresponding to $S_8=0.776\pm 0.064$) and $h=0.696\pm 0.017$ at $1\sigma$.Moreover, assuming a conservative Gaussian prior on the mass bias of gas massfraction data, we find a lower limit on the gas depletion factor$Y_{b,500c}\gtrsim 0.89$.

Cosmological Constraints from Galaxy Cluster Sparsity, Cluster Gas Mass Fraction and Baryon Acoustic Oscillations Data