Galaxy cluster scaling relations measured with APEX-SZ

Abstract

We present thermal Sunyaev-Zel'dovich effect (SZE) measurements for 42 galaxy clusters observed at 150 GHz with the APEX-SZ experiment. For each cluster, we model the pressure profile and calculate the integrated Comptonization $Y$ to estimate the total thermal energy of the intracluster medium (ICM). We compare the measured $Y$ values to X-ray observables of the ICM from the literature (cluster gas mass $M_{\mathrm{gas}}$, temperature $T_X$, and $Y_X=M_{\mathrm{gas}}{T}_X$) that relate to total cluster mass. We measure power law scaling relations, including an intrinsic scatter, between the SZE and X-ray observables for three subsamples within the set of 42 clusters that have uniform X-ray analysis in the literature. We observe that differences between these X-ray analyses introduce significant variability into the measured scaling relations, particularly affecting the normalization. For all three subsamples, we find results consistent with a self-similar model of cluster evolution dominated by gravitational effects. Comparing to predictions from numerical simulations, these scaling relations prefer models that include cooling and feedback in the ICM. Lastly, we measure an intrinsic scatter of $\sim 28$ per cent in the $Y-Y_X$ scaling relation for all three subsamples.

17 pages, 4 figures, submitted to MNRAS

References in corpus (12)

• Planck 2013 results. XVI. Cosmological parameters
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Some Aspects of Measurement Error in Linear Regression of Astronomical Data
• Planck 2013 results. XXIX. Planck catalogue of Sunyaev-Zeldovich sources
• The Atacama Cosmology Telescope: Sunyaev-Zel'dovich Selected Galaxy Clusters at 148 GHz from Three Seasons of Data
• A complete sample of twelve very X-ray luminous galaxy clusters at z>0.5
• Images, structural properties and metal abundances of galaxy clusters observed with Chandra ACIS-I at 0.1<z<1.3
• LoCuSS: Comparison of Observed X-ray and Lensing Galaxy Cluster Scaling Relations with Simulations
• A Survey of Galaxy Kinematics to z ~ 1 in the TKRS/GOODS-N Field. II. Evolution in the Tully-Fisher Relation
• X-ray properties in massive galaxy clusters: XMM-Newton observations of the REFLEX-DXL sample
• High redshift X-ray galaxy clusters. I. The impact of point sources on the cluster properties
• Sunyaev-Zel'dovich Effect Observations of the Bullet Cluster (1E 0657-56) with APEX-SZ

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• Weak-lensing mass calibration of the Sunyaev-Zel'dovich effect using APEX-SZ galaxy clusters
• PACT. II. Pressure profiles of galaxy clusters using Planck and ACT
• Weak lensing measurements of the APEX-SZ galaxy cluster sample
• Diffuse radio emission from non-Planck galaxy clusters in the LoTSS-DR2 fields
• On a possible cosmological evolution of galaxy cluster $Y_{\mathrm{X}}-Y_{\mathrm{SZE}}$ scaling relation
• The comptonization parameter from simulations of single-frequency, single-dish, dual-beam, cm-wave observations of galaxy clusters and mitigating CMB confusion using the Planck sky survey