Correlation of the magnetic field and the intra-cluster gas density in galaxy clusters

Abstract

We present a correlation between X-ray surface brightness and Faraday rotation measure in galaxy clusters, both, from radio and X-ray observations as well as from modeling of the intra-cluster medium. The observed correlation rules out a magnetic field of constant strength throughout the cluster. Cosmological, magneto-hydrodynamic simulations of galaxy clusters are used to show that for a magnetic field of cosmic origin this correlation is expected and excellently reproduces the observations showing that the RMS scatter of the Faraday rotation increases linearly with the X-ray surface brightness. From the correlation between the observable quantities, rotation measure and X-ray surface brightness, we infer a relation between the physical quantities: magnetic field and gas density. For the best available observations, those of A119, we find $B\propto n_e^{0.9}$.

arXiv comment9 pages, 5 figures, accepted for publication in Astronomy and Astrophysics

References in corpus (14)

• A New Radio - X-Ray Probe of Galaxy Cluster Magnetic Fields
• Particle reacceleration in Coma cluster: radio properties and hard X-ray emission
• The Lx-T Relation and Intracluster Gas Fractions of X-ray Clusters
• The Temperature Structure of 30 Nearby Clusters Observed with ASCA. Similarity of Temperature Profiles
• The Observational Distribution of Internal Velocity Dispersions in Nearby Galaxy Clusters
• Cosmological Magnetic Fields Limits in an Inhomogeneous Universe
• Hard X-Ray Radiation in the Coma Cluster Spectrum
• Magnetic Field Evolution in Merging Clusters of Galaxies
• XMM- Newton Observation of the Coma Galaxy Cluster: The temperature structure in the central region
• Hard X-ray emission from the galaxy cluster A2256
• Chandra X-ray observations of the 3C295 cluster core
• A Comparison of X-ray and Strong Lensing Properties of Simulated X-ray Clusters
• The diffuse, relic radio source in Abell 85: estimation of cluster scale magnetic field from inverse Compton X-rays
• Clusters of Galaxies: magnetic fields and nonthermal emission

Cited by in corpus (97)

• Cluster Magnetic Fields
• Clusters of galaxies : observational properties of the diffuse radio emission
• Magnetic Field in Clusters of Galaxies
• Diffuse Radio Emission from Galaxy Clusters
• The Coma cluster magnetic field from Faraday rotation measures
• Observations of extended radio emission in clusters
• Constrained Simulations of the Magnetic Field in the Local Universe and the Propagation of UHECRs
• Constraining the population of cosmic ray protons in cooling flow clusters with gamma-ray and radio observations: Are radio mini-halos of hadronic origin?
• Magnetic Fields and Faraday Rotation in Clusters of Galaxies
• A Bayesian view on Faraday rotation maps - Seeing the magnetic power spectra in galaxy clusters
• Simulating cosmic rays in clusters of galaxies - II. A unified scheme for radio halos and relics with predictions of the gamma-ray emission
• Cluster Magnetic Fields from Galactic Outflows
• The intracluster magnetic field power spectrum in Abell 2255
• Rise and Fall of Radio Halos in Simulated Merging Galaxy Clusters
• Measuring the Cluster Magnetic Field Power Spectra from Faraday Rotation Maps of Abell 400, Abell 2634 and Hydra A
• A thermally stable heating mechanism for the intracluster medium: turbulence, magnetic fields and plasma instabilities
• A non-ideal MHD Gadget: Simulating massive galaxy clusters
• Simulations of extragalactic magnetic fields and of their observables
• Double relics in Abell 2345 and Abell 1240: spectral index and polarization analysis
• Comparative analysis of the diffuse radio emission in the galaxy clusters A1835, A2029, and Ophiuchus
• The Magnetic Power Spectrum in Faraday Rotation Screens
• Structures of the magnetoionic media around the FR I radio galaxies 3C 31 and Hydra A
• Magnetic turbulence in cool cores of galaxy clusters
• Spectral index maps of the radio halos in Abell 665 and Abell 2163
• Rotation Measures of Radio Sources in Hot Galaxy Clusters
• Non-thermal processes in cosmological simulations
• Milestones in the Observations of Cosmic Magnetic Fields
• Simulating cosmic rays in clusters of galaxies - III. Non-thermal scaling relations and comparison to observations
• Turbulent pressure support and hydrostatic mass-bias in the intracluster medium
• Lowering Inferred Cluster Magnetic Field Strengths - the radio galaxy contributions
• Magnetic power spectra from Faraday rotation maps - REALMAF and its use on Hydra A
• Nonthermal phenomena in clusters of galaxies
• Implications of Fermi Observations for Hadronic Models of Radio Halos in Clusters of Galaxies
• Thermodynamic perturbations in the X-ray halo of 33 clusters of galaxies observed with Chandra ACIS
• Estimating galaxy cluster magnetic fields by the classical and hadronic minimum energy criterion
• The intergalactic magnetic field probed by a giant radio galaxy
• Broadband Radio Polarimetry and Faraday Rotation of 563 Extragalactic Radio Sources
• Faraday Rotation Observations of Magnetic Fields in galaxy Clusters
• The Effect of a Chameleon Scalar Field on the Cosmic Microwave Background
• Multifrequency observations of the jets in the radio galaxy NGC 315
• Can cluster merger shocks reproduce the luminosity and shape distribution of radio relics?
• Magnetic field amplification by shocks in galaxy clusters: application to radio relics
• Cosmic Ray-Dominated AGN Jets and the Formation of X-ray Cavities in Galaxy Clusters
• Structure of the magnetoionic medium around the FR Class I radio galaxy 3C 449
• Evolution and Distribution of Magnetic Fields from AGNs in Galaxy Clusters II. The Effects of Cluster Size and Dynamical State
• Galaxy Clusters in the Radio: Relativistic Plasma and ICM/Radio Galaxy Interaction Processes
• The magnetized medium around the radio galaxy B2 0755+37: an interaction with the intra-group gas
• On the influence of non-thermal pressure on the mass determination of galaxy clusters
• The Isotropic Radio Background and Annihilating Dark Matter
• Magnetic Field Evolution in Giant Radio Relics using the example of CIZA J2242.8+5301
• The LOFAR view of intergalactic magnetic fields with giant radio galaxies
• On the origin of magnetic driven winds and the structure of the galactic dynamo in isolated galaxies
• Comparisons of Cosmological MHD Galaxy Cluster Simulations to Radio Observations
• Constraining ALP-photon coupling using galaxy clusters
• On the small scale turbulent dynamo in the intracluster medium: A comparison to dynamo theory
• Probing Intracluster Magnetic Fields with Cosmic Microwave Background Polarization
• Cluster Mergers and the Origin of the ARCADE-2 Excess
• Characterizing the Uncertainty in Cluster Magnetic Fields derived from Rotation Measures
• Magnetic fields in Clusters of Galaxies
• Where does the hard X-ray diffuse emission in clusters of galaxies come from?
• XMM-Newton observations of the Coma cluster relic 1253+275
• High Energy Neutrinos from Cosmic Ray Interactions in Clusters of Galaxies
• A Radio and X-ray Study of the Merging Cluster A2319
• Observations of magnetic fields in regular and irregular clusters
• Simulating large-scale structure formation with magnetic fields
• Removing Cool Cores and Central Metallicity Peaks in Galaxy Clusters with Powerful AGN Outbursts
• Probing cluster magnetism with embedded and background radio sources in Planck clusters
• Simulating X-ray Supercavities and Their Impact on Galaxy Clusters
• Rotation Measure synthesis applied on synthetic SKA images of galaxy clusters
• The thermal and non-thermal components within and between galaxy clusters Abell 399 and Abell 401
• Beyond the Standard Lore of the SZ effect
• A low frequency study of linear polarization in radio galaxies
• Properties and Spectral Behaviour of Cluster Radio Halos
• Reconciling stellar dynamical and hydrostatic X-ray mass measurements of an elliptical galaxy with gas rotation, turbulence and magnetic fields
• Turbulent magnetic fields in merging clusters: A case study of Abell 2146
• SPMHD simulations of Structure Formation
• Amplification of Primordial Magnetic Fields by Anisotropic Gravitational Collapse
• The effect of cluster magnetic field on the Sunyaev Zeldovich power spectrum
• Magnetic Sunyaev-Zel'dovich effect in galaxy clusters
• The influence of magnetic fields on the Sunyaev Zel'dovich effect in clusters of galaxies
• A BeppoSAX Observation of the IC1262 Galaxy Cluster
• The Chameleonic Contribution to the SZ Radial Profile of the Coma Cluster
• Dispersal of Galactic Magnetic Fields into Intracluster Space
• Galaxy cluster constraints on the coupling to photons of low-mass scalars
• The impact of magnetic field on the cluster M-T relation
• A depolarizing HI tidal tail in the western lobe of Fornax A
• Polarised radiative transfer, rotation measure fluctuations and large-scale magnetic fields
• The Growth of Baryonic Structure in the Presence of Cosmological Magnetic Pressure
• Active galactic nuclei through the prism of galaxy clusters: bounds on axion-like particles
• The complex galaxy cluster Abell 514: New results obtained with the XMM - Newton satellite
• Radio Observations as a Probe of Cosmic Web Magnetism
• The effect of magnetic field on the inner Galactic rotation curve
• Scale-Free Thin Discs with an Isopedic Magnetic Field
• Constraints on Axion-Like Particles from VERITAS Observations of a Flaring Radio Galaxy in the Perseus Cluster
• Large-scale magnetic fields in cosmology
• Modelling Giant Radio Halos
• Analysing the Effect on CMB in a Parity and Charge Parity Violating Varying Alpha Theory