Measurement of the Relativistic Sunyaev-Zeldovich Corrections in RX J1347.5-1145

Abstract

We present a measurement of the relativistic corrections to the thermal Sunyaev-Zel'dovich (SZ) effect spectrum, the rSZ effect, toward the massive galaxy cluster RX J1347.5-1145 by combining sub-mm images from Herschel-SPIRE with mm-wave Bolocam maps. Our analysis simultaneously models the SZ effect signal, the population of cosmic infrared background (CIB) galaxies, and galactic cirrus dust emission in a manner that fully accounts for their spatial and frequency-dependent correlations. Gravitational lensing of background galaxies by RX J1347.5-1145 is included in our methodology based on a mass model derived from HST observations. Utilizing a set of realistic mock observations, we employ a forward modelling approach that accounts for the non-Gaussian covariances between observed astrophysical components to determine the posterior distribution of SZ effect brightness values consistent with the observed data. We determine a maximum a posteriori (MAP) value of the average Comptonization parameter of the intra-cluster medium (ICM) within R${}_{2500}$ to be $⟨y{⟩}_{2500}=1.56\times 10^{-4}$, with corresponding 68~per cent credible interval $[1.42,1.63]\times 10^{-4}$, and a MAP ICM electron temperature of $⟨{\text{T}}_{\text{sz}}{⟩}_{2500}=22.4$~keV with 68~per cent credible interval spanning $[10.4,33.0]$~keV. This is in good agreement with the pressure-weighted temperature obtained from {\it Chandra} X-ray observations, $⟨{\text{T}}_{\text{x,pw}}{⟩}_{2500}=17.4\pm 2.3$~keV. We aim to apply this methodology to comparable existing data for a sample of 39 galaxy clusters, with an estimated uncertainty on the ensemble mean $⟨{\text{T}}_{\text{sz}}{⟩}_{2500}$ at the $\simeq 1$~keV level, sufficiently precise to probe ICM physics and to inform X-ray temperature calibration.

20 pages, 9 figures

References in corpus (18)

• Heating Hot Atmospheres with Active Galactic Nuclei
• Shocks and cold fronts in galaxy clusters
• Galaxy Clusters Discovered via the Sunyaev-Zel'dovich Effect in the 2500-square-degree SPT-SZ survey
• The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters
• Hubble Space Telescope Combined Strong and Weak Lensing Analysis of the CLASH Sample: Mass and Magnification Models and Systematic Uncertainties
• The galaxy cluster mass scale and its impact on cosmological constraints from the cluster population
• Cosmology and Astrophysics from Relaxed Galaxy Clusters II: Cosmological Constraints
• Cosmology and Astrophysics from Relaxed Galaxy Clusters I: Sample Selection
• Galaxy Cluster Scaling Relations between Bolocam Sunyaev-Zel'dovich Effect and Chandra X-ray Measurements
• The Atacama Large Aperture Submillimetre Telescope (AtLAST)
• Star formation in the massive cluster merger Abell 2744
• The Sunyaev-Zel'dovich Effect at Five Arc-seconds: RXJ1347.5-1145 Imaged by ALMA
• Relativistic SZ temperature scaling relations of groups and clusters derived from the BAHAMAS and MACSIS simulations
• The Contribution of Radio Galaxy Contamination to Measurements of the Sunyaev-Zel'dovich Decrement in Massive Galaxy Clusters at 140 GHz with Bolocam
• Baryons in Dark Matter Halos
• The Sunyaev-Zel'dovich temperature of the intracluster medium
• High significance detection of the tSZ effect relativistic corrections
• Measuring $H_0$ using X-ray and SZ effect observations of dynamically relaxed galaxy clusters

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• PCAT-DE: Reconstructing point-like and diffuse signals in astronomical images using spatial and spectral information
• Temperature measurements with the relativistic Sunyaev-Zel'dovich effect