Double radio relics and radio halo in the high redshift galaxy cluster El Gordo with the Upgraded GMRT

Abstract

Diffuse synchrotron radio sources associated with the intra-cluster medium of galaxy clusters are of special interest at high redshifts to understand the magnetization and particle acceleration mechanisms. El Gordo (EG) is the most massive galaxy cluster at high redshift (0.87), hosts a radio halo and a double radio relic system. We aim to understand the role of turbulence in the origin of the diffuse radio emission by combining radio and X-ray observations. We observed EG with the Upgraded GMRT at 0.3 - 1.45 GHz and obtained the integrated spectra, spatially resolved spectral map, and scaling relations between radio and X-ray surface brightness. We constructed a density fluctuation power spectrum for the central 1 Mpc region using Chandra data. The radio halo and the double relics are detected at all the bands and, in addition, we detect an extension to the eastern relic. The radio halo has a spectral index of $-1.0\pm 0.3$ with a possible steepening beyond 1.45 GHz. All the relics have spectral indices of $-1.4$ except the extension of the east relic which has $-2.1\pm 0.4$. The radio and X-ray surface brightness point-to-point analysis at bands 3 and 4 show slopes of $0.60\pm 0.12$ and $0.76\pm 0.12$, respectively. The spectral index and X-ray surface brightness show an anti-correlation. The density fluctuations peak at $\sim 700$ kpc with an amplitude of $(\delta \rho /\rho )=0.15\pm 0.02$. We derive the 3D turbulent Mach number of $\sim$ 0.6 from the gas density fluctuations power spectrum, assuming all the fluctuations are attributed to turbulence. The derived properties of EG are in line with the low redshift clusters indicating that fast magnetic amplification proposed in high redshift clusters is at work in EG as well. We have discussed the consistency of the obtained results with the turbulent re-acceleration which might be representative of high redshift merging clusters.

arXiv commentAccepted for publication in Astronomy and Astrophysics, 14 pages, 12 figures, 2 tables

References in corpus (92)

• Some Aspects of Measurement Error in Linear Regression of Astronomical Data
• A Cosmology Calculator for the World Wide Web
• Cosmic rays in galaxy clusters and their non-thermal emission
• Particle reacceleration in Coma cluster: radio properties and hard X-ray emission
• Diffuse Radio Emission from Galaxy Clusters
• On The Non Thermal Emission and Acceleration of Electrons in Coma and Other Clusters of Galaxies
• Particle Acceleration on Megaparsec Scales in a Merging Galaxy Cluster
• An Accurate Flux Density Scale from 50 MHz to 50 GHz
• On the connection between giant radio halos and cluster mergers
• The Atacama Cosmology Telescope: Sunyaev Zel'dovich Selected Galaxy Clusters at 148 GHz in the 2008 Survey
• Properties of Cosmic Shock Waves in Large Scale Structure Formation
• A low-frequency radio halo associated with a cluster of galaxies
• A Comparison of Radio and X-Ray Morphologies of Four Clusters of Galaxies Containing Radio Halos
• Cluster mergers and non-thermal phenomena: expectations from a statistical magneto-turbulent model
• Radio and X-ray diffuse emission in six clusters of galaxies
• Contour binning: a new technique for spatially-resolved X-ray spectroscopy applied to Cassiopeia A
• Revisiting scaling relations for giant radio halos in galaxy clusters
• Radio signature of cosmological structure formation shocks
• GMRT Radio Halo Survey in galaxy clusters at z = 0.2 -- 0.4. II.The eBCS clusters and analysis of the complete sample
• X-Ray surface brightness and gas density fluctuations in the Coma cluster
• The Atacama Cosmology Telescope: ACT-CL J0102-4915 "El Gordo," a Massive Merging Cluster at Redshift 0.87
• The diffuse radio emission from the Coma cluster at 2.675 GHz and 4.85 GHz
• Acceleration of primary and secondary particles in galaxy clusters by compressible MHD turbulence: from radio halos to gamma rays
• Cosmic rays and Radio Halos in galaxy clusters : new constraints from radio observations
• Shock acceleration as origin of the radio relic in A521?
• Stochastic reacceleration of relativistic electrons by turbulent reconnection: a mechanism for cluster-scale radio emission ?
• The MeerKAT Galaxy Cluster Legacy Survey I. Survey Overview and Highlights
• The relation between gas density and velocity power spectra in galaxy clusters: high-resolution hydrodynamic simulations and the role of conduction
• Shock acceleration efficiency in radio relics
• Turbulence and Vorticity in Galaxy Clusters Generated by Structure Formation
• Re-acceleration of Nonthermal Particles at Weak Cosmological Shock Waves
• The Atacama Cosmology Telescope: Physical Properties and Purity of a Galaxy Cluster Sample Selected via the Sunyaev-Zel'dovich Effect
• Constraining turbulence and conduction in the hot ICM through density perturbations
• Turbulence and Particle Acceleration in Giant Radio Haloes: the Origin of Seed Electrons
• The Atacama Cosmology Telescope: Dynamical Masses and Scaling Relations for a Sample of Massive Sunyaev-Zel'dovich Effect Selected Galaxy Clusters
• On the occurrence of Radio Halos in galaxy clusters - Insight from a mass-selected sample
• Relativistic protons in the Coma galaxy cluster: first gamma-ray constraints ever on turbulent reacceleration
• Weighing "El Gordo" with a Precision Scale: Hubble Space Telescope Weak-lensing Analysis of the Merging Galaxy Cluster ACT-CL J0102-4915 at z=0.87
• Gas Density Fluctuations in the Perseus Cluster: Clumping Factor and Velocity Power Spectrum
• The Extended GMRT Radio Halo Survey II: Further results and analysis of the full sample
• Deep VLA observations of the cluster 1RXS J0603.3+4214 in the frequency range 1-2 GHz
• The Planck clusters in the LOFAR sky. I. LoTSS-DR2: new detections and sample overview
• The Matryoshka Run (II): Time Dependent Turbulence Statistics, Stochastic Particle Acceleration and Microphysics Impact in a Massive Galaxy Cluster
• The Radio Relics and Halo of El Gordo, a Massive $z=0.870$ Cluster Merger
• Second order Fermi reacceleration mechanisms and large scale synchrotron radio emission in intra-cluster bridges
• A giant radio halo in the cool core cluster CL1821+643
• A Sunyaev-Zel'dovich take on cluster radio haloes -- I. Global scaling and bi-modality using Planck data
• Shock fronts, electron-ion equilibration and ICM transport processes in the merging cluster Abell 2146
• Efficiency of Nonlinear Particle Acceleration at Cosmic Structure Shocks
• The beautiful mess in Abell 2255
• The relation between gas density and velocity power spectra in galaxy clusters: qualitative treatment and cosmological simulations
• Spectral properties and origin of the radio halo in A3562
• A $\mathcal{M}\gtrsim 3$ shock in `El Gordo' cluster and the origin of the radio relic
• LOFAR discovery of an ultra-steep radio halo and giant head-tail radio galaxy in Abell 1132
• Suppressed effective viscosity in the bulk intergalactic plasma
• A Mexican Hat with holes: calculating low resolution power spectra from data with gaps
• CAPTURE: A continuum imaging pipeline for the uGMRT
• Shocks and cold fronts in merging and massive galaxy clusters: new detections with Chandra
• Radio halos in a mass-selected sample of 75 galaxy clusters. II. Statistical analysis
• Spectral and polarization study of the double relics in Abell 3376 using the GMRT and the VLA
• On the connection between turbulent motions and particle acceleration in galaxy clusters
• MeerKAT view of the diffuse radio sources in Abell 3667 and their interactions with the thermal plasma
• Dissecting nonthermal emission in the complex multiple-merger galaxy cluster Abell 2744: Radio and X-ray analysis
• Fast magnetic field amplification in distant galaxyclusters
• A cluster in a crowded environment: XMM-Newton and Chandra observations of A3558
• The Coma cluster at LOFAR frequencies I: insights into particle acceleration mechanisms in the radio bridge
• Radio observations of the merging galaxy cluster Abell 520
• Radio footprints of a minor merger in the Shapley Supercluster: From supercluster down to galactic scales
• Physical insights from the spectrum of the radio halo in MACS J0717.5+3745
• Radio and X-ray connection in radio mini-halos: implications for hadronic models
• A Hydrodynamical Solution for the "Twin-Tailed" Colliding Galaxy Cluster "El Gordo"
• The LOFAR and JVLA view of the distant steep spectrum radio halo in MACS J1149.5+2223
• Initial Conditions for Idealised Clusters Mergers, simulating El Gordo
• Turbulent Cosmic Ray Reacceleration at Radio Relics and Halos in Clusters of Galaxies
• The discovery of radio halos in the Frontier Fields clusters Abell S1063 and Abell 370
• Giant Metrewave Radio Telescope monitoring of the black hole X-ray binary, V404 Cygni, during its June 2015 outburst
• Simulating the galaxy cluster "El Gordo" and identifying the merger configuration
• A joint XMM-NuSTAR observation of the galaxy cluster Abell 523: constraints on Inverse Compton emission
• Deep low-frequency radio observations of Abell 2256 II: The ultra-steep spectrum radio halo
• Diffuse galaxy cluster emission at 168 MHz within the Murchison Widefield Array Epoch of Reionization 0-hour field
• Diffuse Radio Emission from Galaxy Clusters in the LOFAR Two-metre Sky Survey Deep Fields
• Synchrotron Intensity Gradient Revealing Magnetic Fields in Galaxy Clusters
• The Planck clusters in the LOFAR sky. III. LoTSS-DR2: Dynamic states and density fluctuations of the intracluster medium
• MERGHERS Pilot: MeerKAT discovery of diffuse emission in nine massive Sunyaev-Zel'dovich-selected galaxy clusters from ACT
• LOFAR discovery of a radio halo in the high-redshift galaxy cluster PSZ2 G099.86+58.45
• A LOFAR view into the stormy environment of the galaxy cluster 2A0335+096
• Statistical Properties of Radio Halos in Galaxy Clusters and Origin of Seed Electrons for Reacceleration
• A MeerKAT-meets-LOFAR study of Abell 1413: a moderately disturbed non-cool-core cluster hosting a $\sim 500$ kpc 'mini'-halo
• Multiwavelength view of SPT-CL J2106-5844. The radio galaxies and the thermal and relativistic plasmas in a massive galaxy cluster merger at z~1.13
• The diffuse radio emission in the high-redshift cluster PSZ2 G091.83+26.11: total intensity and polarisation analysis with Very Large Array 1-4 GHz observations
• Probing particle acceleration in Abell 2256: from to 16 MHz to gamma rays
• Sardinia Radio Telescope observations of the Coma Cluster

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