J/ApJ/911/82 Sparsity & gas mass fraction of galaxy clusters (Corasaniti+, 2021) ================================================================================ Cosmological constraints from galaxy cluster sparsity, cluster gas mass fraction, and baryon acoustic oscillation data. Corasaniti P.-S., Sereno M., Ettori S. =2021ApJ...911...82C ================================================================================ ADC_Keywords: Clusters, galaxy; Surveys; Redshifts; Optical; X-ray sources Keywords: Cosmological parameters from large-scale structure ; Cosmology ; Galaxy clusters Abstract: In recent years, the availability of large, complete cluster samples has enabled numerous cosmological parameter inference analyses using cluster number counts. These have provided constraints on the cosmic matter density {Omega}_m_ and the amplitude of matter density fluctuations {sigma}_8_ alternative to that obtained from other standard probes. However, systematics uncertainties, such as the mass calibration bias and selection effects, may still significantly affect these data analyses. Hence, it is timely to explore other proxies of galaxy cluster cosmology that can provide cosmological constraints complementary to those obtained from cluster number counts. Here we use measurements of the cluster sparsity from weak-lensing mass estimates of the LC^2^-single and HSC-XXL cluster catalogs to infer constraints on a flat {Lambda}CDM model. The cluster sparsity has the advantage of being insensitive to selection and mass calibration bias. On the other hand, it primarily constrains a degenerate combination of {Omega}_m_ and {sigma}_8_ (along approximately constant curves of S_8_={sigma}_8_({Omega}_m_/0.3)^0.5^ and, to a lesser extent, the reduced Hubble parameter h. Hence, in order to break the internal parameter degeneracies, we perform a combined likelihood analysis of the cluster sparsity estimates with cluster gas mass fraction measurements and BAO data. We find marginal constraints that are competitive with those from other standard cosmic probes: {Omega}_m_=0.316+/-0.013, {sigma}_8_=0.757+/-0.067 (corresponding to S_8_=0.776+/-0.064), and h=0.696+/-0.017 at 1{sigma}. Moreover, assuming a conservative Gaussian prior on the mass bias of gas mass fraction data, we find a lower limit on the gas depletion factor Y_b,500c_>~0.89. Description: We estimate the sparsity of galaxy clusters using lensing mass measurements from publicly available cluster catalogs at M500c and M200c. In particular, we consider a selected sample of clusters from the Literature Catalogs of Lensing Clusters (LC^2^; Sereno 2015, J/MNRAS/450/3665) that includes as subsets the PSZ2Lens (Sereno+ 2017MNRAS.472.1946S) and the Cluster Lensing and Supernova Hubble (CLASH) project (Postman+ 2012, J/ApJS/199/25) catalogs. In addition, we consider the Subaru Hyper Suprime-Cam (HSC) lensing mass determinations (Umetsu+ 2020, J/ApJ/890/148) of an X-ray-selected cluster sample from the XXL-XMM survey (Pierre+ 2016, IX/49), which we refer to as the HSC-XXL sample. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 60 317 Galaxy clusters from the selected LC-single and HSC-XXL catalogs table2.dat 35 106 Galaxy cluster gas mass fractions -------------------------------------------------------------------------------- See also: B/xmm : XMM-Newton Obs. Log (XMM-Newton Science Operation Center, 2012) VIII/91 : Planck Catalog of Compact Sources Release 1 (Planck, 2013) IX/49 : XXL Survey: First results (Pierre+, 2016) IX/52 : XXL Survey. DR2 (Chiappetti+, 2018) J/A+A/521/A78 : Velocities in the A2345 cluster (Boschin+, 2010) J/ApJS/199/25 : CLASH sources for MACS1149.6+2223 (Postman+, 2012) J/ApJS/216/27 : Galaxy clusters in the SPT-SZ survey (Bleem+, 2015) J/MNRAS/449/835 : Clustering of SDSS DR7 main galaxy sample. I. (Ross+, 2015) J/MNRAS/450/3665 : CoMaLit. III. LC2 catalog (Sereno+, 2015) J/A+A/594/A27 : Planck Sunyaev-Zeldovich sources (PSZ2) (Planck+, 2016) J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016) J/ApJS/224/1 : redMaPPer cluster catalog from DES data (Rykoff+, 2016) J/AJ/153/220 : NORAS II. I. First results (Bohringer+, 2017) J/MNRAS/465/4914 : R-band light curves of HE 0435-1223 (Bonvin+, 2017) J/A+A/601/A145 : Catalogue of cluster members (Foex+, 2017) J/A+A/617/A64 : 3D density & temp. profiles of clusters (Bartalucci+, 2018) J/ApJ/878/55 : SPT-SZ clusters with optical & X-ray data (Bocquet+, 2019) J/A+A/633/A69 : KiDS-VIKING-450 cosmic shear (Hildebrandt+, 2020) J/ApJ/890/148 : Concentration-mass relation for XXL clusters (Umetsu+, 2020) http://github.com/pierste75/Halo_Sparsity : Halo_Sparsity code Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 20 A20 --- Name Galaxy Cluster Name 22- 26 F5.3 --- z [0.03/1.5] Redshift 28- 32 F5.2 10+14Msun M200c [0.07/57] Weak lensing estimated M200c mass 34- 38 F5.2 10+14Msun e_M200c [0.08/27] Uncertainty in M200c 40- 44 F5.2 10+14Msun M500c [0.05/30] Weak lensing estimated M200c mass 46- 50 F5.2 10+14Msun e_M500c [0.05/12] Uncertainty in M500c 52- 55 F4.2 --- S200500 [1.16/2] Sparsity (see Section 2.1) 57- 60 F4.2 --- e_S200500 [0.04/1.8] Uncertainty in S200500 -------------------------------------------------------------------------------- Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 16 A16 --- Name Galaxy Cluster Name 18- 23 F6.4 --- z [0.047/1.3] Redshift 25- 29 F5.3 --- fgas [0.02/0.3] Cluster gas mass fraction (see Section 2.3) 31- 35 F5.3 --- e_fgas [0.005/0.2] Uncertainty in fgas -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Prepared by [AAS], Emmanuelle Perret [CDS] 11-Oct-2022