Polarisation of Radio Relics in Galaxy Clusters

Abstract

Radio emission in the form of giant radio relics is observed at the periphery of galaxy clusters. This non-thermal emission is an important tracer for cosmic-ray electrons and intracluster magnetic fields. One striking observational feature of these objects is their high degree of polarisation which provides information on the magnetic fields at the relics' positions. In this contribution, we test if state-of-the-art high resolution cosmological simulations are able to reproduce the polarisation features of radio relics. Therefore, we present a new analysis of high-resolution cosmological simulations to study the polarisation properties of radio relics in detail. In order to compare our results with current and future radio observations, we create mock radio observations of the diffuse polarised emission from a massive galaxy clusters using six different projections, for different observing frequencies and for different telescopes. Our simulations suggest that, due to the effect of Faraday rotation, it is extremely difficult to relate the morphology of the polarised emission for observing frequencies below $1.4\mathrm{GHz}$ to the real magnetic field structure in relics. We can reproduce the observed degree of polarisation and also several small-scale structures observed in real radio relics, but further work would be needed to reproduce some large-scale spectacular features as observed in real radio relics, such as the "Sausage" and the "Toothbrush" relics.

arXiv commentAccepted for publication in MNRAS, 20 pages, 13 figures

References in corpus (61)

• Enzo: An Adaptive Mesh Refinement Code for Astrophysics
• Faraday Rotation Measure Synthesis
• The LOFAR Two-metre Sky Survey - I. Survey Description and Preliminary Data Release
• Cosmic rays in galaxy clusters and their non-thermal emission
• Simulations of Ion Acceleration at Non-relativistic Shocks. I. Acceleration Efficiency
• Diffuse Radio Emission from Galaxy Clusters
• Particle Acceleration on Megaparsec Scales in a Merging Galaxy Cluster
• Observations of extended radio emission in clusters
• Bow shock and radio halo in the merging cluster A520
• Radio signature of cosmological structure formation shocks
• Simulations of Ion Acceleration at Non-relativistic Shocks. II. Magnetic Field Amplification
• Shock Waves in Eulerian Cosmological Simulations: Main Properties and Acceleration of Cosmic Rays
• Giant radio relics in galaxy clusters: reacceleration of fossil relativistic electrons?
• Search for cosmic-ray induced gamma-ray emission in Galaxy Clusters
• Discovery of radio halos and double-relics in distant MACS galaxy clusters: clues to the efficiency of particle acceleration
• Resolved magnetic dynamo action in the simulated intracluster medium
• XMM-Newton Observation of the Northwest Radio Relic Region in Abell 3667
• Deep 1.4 GHz VLA Observations of the Radio Halo and Relic in Abell 2256
• Magnetic Field Amplification in Galaxy Clusters and its Simulation
• The "toothbrush-relic": evidence for a coherent linear 2-Mpc scale shock wave in a massive merging galaxy cluster?
• Double relics in Abell 2345 and Abell 1240: spectral index and polarization analysis
• Cosmological MHD Simulations of Galaxy Cluster Radio Relics: Insights and Warnings for Observations
• Another shock for the Bullet cluster, and the source of seed electrons for radio relics
• A new double radio relic in PSZ1 G096.89+24.17 and a radio relic mass-luminosity relation
• Non-Thermal Electron Acceleration in Low Mach Number Collisionless Shocks. II. Firehose-Mediated Fermi Acceleration and its Dependence on Pre-Shock Conditions
• Revealing the magnetic field in a distant galaxy cluster: discovery of the complex radio emission from MACS J0717.5 +3745
• Radio continuum observations of new radio halos and relics from the NVSS and WENSS surveys
• Properties of Merger Shocks in Merging Galaxy Clusters
• Deep VLA observations of the cluster 1RXS J0603.3+4214 in the frequency range 1-2 GHz
• Do radio relics challenge diffusive shock acceleration?
• Measurements and simulation of Faraday rotation across the Coma radio relic
• The Radio Relics and Halo of El Gordo, a Massive $z=0.870$ Cluster Merger
• Deep Very Large Array observations of the merging cluster CIZA J2242.8+5301: continuum and spectral imaging
• A $\mathcal{M}\gtrsim 3$ shock in `El Gordo' cluster and the origin of the radio relic
• Dynamical evolution of magnetic fields in the intracluster medium
• Faraday Rotation Measure due to the Intergalactic Magnetic Field
• A double radio relic in the merging galaxy cluster ZwCl 0008.8+5215
• Testing cosmic-ray acceleration with radio relics: a high-resolution study using MHD and tracers
• Spectral and polarization study of the double relics in Abell 3376 using the GMRT and the VLA
• The Cosmic Large-Scale Structure in X-rays (CLASSIX) Cluster Survey I: Probing galaxy cluster magnetic fields with line of sight rotation measures
• Faraday Rotation Measure due to the Intergalactic Magnetic Field II: the Cosmological Contribution
• Radio and X-ray Shocks in Clusters of galaxies
• The intergalactic magnetic field probed by a giant radio galaxy
• VLA Radio Observations of the HST Frontier Fields Cluster Abell 2744: The Discovery of New Radio Relics
• Relics in galaxy clusters at high radio frequencies
• Chandra and JVLA observations of HST Frontier Fields cluster MACS J0717.5+3745
• Can cluster merger shocks reproduce the luminosity and shape distribution of radio relics?
• Suzaku observations of the merging galaxy cluster Abell2255: The northeast radio relic
• Magnetic field amplification by shocks in galaxy clusters: application to radio relics
• A powerful double radio relic system discovered in PSZ1 G108.18-11.53: evidence for a shock with non-uniform Mach number?
• Optimum frequency band for radio polarisation observations
• MC${}^2$: Multi-wavelength and dynamical analysis of the merging galaxy cluster ZwCl 0008.8+5215: An older and less massive Bullet Cluster
• Complex diffuse radio emission in the merging PLANCK ESZ cluster Abell 3411
• Probing the origin of extragalactic magnetic fields with Fast Radio Bursts
• Polarization of cluster radio halos with upcoming radio interferometers
• Observations of the galaxy cluster CIZA J2242.8+5301 with the Sardinia Radio Telescope
• Radio observations of the double-relic galaxy cluster Abell 1240
• Diffuse radio sources in the cluster of galaxies Abell 548b
• The Discovery of Diffuse Radio Polarization Structures in the NVSS
• Effects of Alfvenic Drift on Diffusive Shock Acceleration at Weak Cluster Shocks
• Can the cosmic-ray driven dynamo model explain the observations of the polarized emission of edge-on galaxies ?

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• 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
• New mysteries and challenges from the Toothbrush relic: wideband observations from 550 MHz to 8 GHz
• Exploring the spectral properties of radio relics I: Integrated spectral index and Mach number
• MeerKAT uncovers the physics of an Odd Radio Circle
• Morphology of radio relics I: What causes the substructure of synchrotron emission?
• Deep low-frequency radio observations of Abell 2256 I: The filamentary radio relic
• Understanding the radio relic emission in the galaxy cluster MACS J0717.5+3745: spectral analysis
• Analytical model for cluster radio relics
• A perfect power-law spectrum even at highest frequencies: The Toothbrush relic
• Downstream depolarization in the Sausage relic: a 1-4 GHz Very Large Array study
• Polarized accretion shocks from the cosmic web
• Limiting the shock acceleration of cosmic-ray protons in the ICM
• Turbulent magnetic fields in the merging galaxy cluster MACS J0717.5+3745: polarization analysis
• Morphology of radio relics II: Properties of polarised emission
• Spectro-polarimetric observations of the CIZA J2242.8+5301 northern radio relic: no evidence of high-frequency steepening
• Radio relics in PSZ2 G096.88+24.18: A connection with pre-existing plasma
• Evolution of Splashback Boundaries and Gaseous Outskirts: Insights from Mergers of Self-similar Galaxy Clusters
• Using the polarization properties of double radio relics to probe the turbulent compression scenario
• Exploring diffuse radio emission in galaxy clusters and groups with the uGMRT and the SKA
• 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
• Multi wavelength cross-correlation analysis of the simulated cosmic web
• Magnetic fields in the outskirts of PSZ2 G096.88+24.18 from depolarization analysis of radio relics
• On the Challenges of Cosmic-Ray Proton Shock Acceleration in the Intracluster Medium
• Simulating the LOcal Web (SLOW) -- III: Synchrotron emission from the local cosmic web
• A morphological analysis of the substructures in radio relics
• Properties of Polarized Synchrotron Emission from Fluctuation Dynamo Action -- II. Effects of Turbulence Driving in the ICM and Beam Smoothing
• Spectral study of the diffuse synchrotron source in the galaxy cluster Abell 523
• Constraints on the magnetic field in the inter-cluster bridge A399-A401
• The LOFAR sub-arcsecond view of the high-redshift radio relic in PSZ2G091.83+26.11
• A high-resolution study of the double radio relic system in MACS J1752.0+4440
• Modelling the Energy Spectra of Radio Relics