Reconstructing three-dimensional parameters of galaxy clusters via multifrequency SZ observations

Abstract

The Sunyaev-Zeldovich (SZ) effect is a promising tool to study physical properties of the hot X-ray emitting intracluster medium (ICM) in galaxy clusters. To date, most SZ observations have been interpreted in combination with X-ray follow-up measurements in order to determine the ICM temperature and estimate the cluster mass. Future high-resolution, multifrequency SZ observations promise to enable detailed studies of the ICM structures, by measuring the ICM temperature through the temperature-dependent relativistic corrections. In this work we develop a non-parametric method to derive three-dimensional physical quantities, including temperature, pressure, total mass, and peculiar velocities, of galaxy clusters from SZ observations alone. We test the performance of this method using hydrodynamical simulations of galaxy clusters, in order to assess systematic uncertainties in the reconstructed physical parameters. In particular, we analyze mock Cerro Chajnantor Atacama Telescope (CCAT) SZ observations, taking into account various sources of systematic uncertainties associated with instrumental effects and astrophysical foregrounds. We show that our method enables accurate reconstruction of the three-dimensional ICM profiles, while retaining full information about the gas distribution. We discuss the application of this technique for ongoing and future multifrequency SZ observations.

MNRAS in press

References in corpus (10)

• Testing X-ray Measurements of Galaxy Clusters with Cosmological Simulations
• Effects of Baryons and Dissipation on the Matter Power Spectrum
• Planck Intermediate Results. V. Pressure profiles of galaxy clusters from the Sunyaev-Zeldovich effect
• X-ray and Sunyaev-Zel'dovich Effect Measurements of the Gas Mass Fraction in Galaxy Clusters
• A fast and accurate method for computing the Sunyaev-Zeldovich signal of hot galaxy clusters
• X-ray and Sunyaev-Zel'dovich scaling relations in galaxy clusters
• A Multi-wavelength Study of the Sunyaev-Zel'dovich Effect in the Triple-Merger Cluster MACS J0717.5+3745 with MUSTANG and Bolocam
• Joint deprojection of Sunyaev-Zeldovich and X-ray images of galaxy clusters
• Cosmological Constraints from Galaxy Cluster Velocity Statistics
• The first measurement of temperature standard deviation along the line-of-sight in galaxy clusters

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• Status of MUSIC, the MUltiwavelength Sub/millimeter Inductance Camera
• The galaxy cluster outskirts probed by Chandra
• Relativistic SZ temperature scaling relations of groups and clusters derived from the BAHAMAS and MACSIS simulations
• A multi-simulation study of relativistic SZ temperature scalings in galaxy clusters and groups
• Gas rotation in galaxy clusters: signatures and detectability in X-rays
• Measuring $H_0$ using X-ray and SZ effect observations of dynamically relaxed galaxy clusters
• Entropy Flattening, Gas Clumping and Turbulence in Galaxy Clusters
• Multiple scattering Sunyaev-Zeldovich signal I: lowest order effect
• Multi-wavelength mock observations of the WHIM in a simulated galaxy cluster
• Cosmography with the Sunyaev-Zeldovich effect and X-ray data
• ALMACAL VII: First Interferometric Number Counts at 650 $\mu$m