Diffuse polarized emission associated with the Perseus cluster

Abstract

We report on full-polarization radio observations of the Perseus cluster (Abell 426) using the Westerbork Synthesis Radio Telescope (WSRT) at wavelengths from 81-95 cm. We have employed a novel technique, Rotation Measure synthesis (Brentjens and de Bruyn, 2005) to unravel the polarization properties of the emission across the full field of view and detect polarized emission over a wide range of RM from about 0 to 90 rad m^-2. The low RM emission is associated with our Galaxy, while the high RM emission is associated with the Perseus cluster. The latter reaches typical surface brightness levels of 0.5-1 mJy per beam and must be rather highly polarized. Most of the peripheral polarized emission appears too bright, by about 1-2 orders of magnitude, to be explainable as Thomson scattered emission of the central radio source off the thermal electrons in the cluster. The bulk of the emission associated with the Perseus cluster is probably related to buoyant bubbles of relativistic plasma, probably relics from still active or now dormant AGN within the cluster. A lenticular shaped structure measuring 0.5-1 Mpc is strikingly similar to the structures predicted by Ensslin et al. (1998). At the western edge of the cluster, we detect very long, linear structures that may be related to shocks caused by infall of gas into the Perseus cluster.

18 pages, 17 figures, accepted by A&A, corrected small typo, added reference

References in corpus (25)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Where are the Baryons?
• Faraday Rotation Measure Synthesis
• A deep Chandra observation of the Perseus cluster: shocks and ripples
• A New Radio - X-Ray Probe of Galaxy Cluster Magnetic Fields
• The Wisconsin H-Alpha Mapper Northern Sky Survey
• XMM-Newton observations of the Perseus Cluster I: The temperature and surface brightness structure
• Radio galaxies with a `double-double' morphology: I - Analysis of the radio properties and evidence for interrupted activity in active galactic nuclei
• Properties of Cosmic Shock Waves in Large Scale Structure Formation
• Reviving Fossil Radio Plasma in Clusters of Galaxies by Adiabatic Compression in Environmental Shock Waves
• Radio and X-ray diffuse emission in six clusters of galaxies
• On the Formation of Cluster Radio Relics
• Radio polarization from the inner Galaxy at arcminute resolution
• A2255: the First Detection of Filamentary Polarized Emission in a Radio Halo
• The Complex Cooling Core of Abell 2029: Radio and X-ray Interactions
• XMM-Newton confirmation of Soft X-ray excess emission in clusters of galaxies - the discovery of O VII emission from an extended warm baryonic component
• Imprint of Intergalactic Shocks on the Radio Sky
• Arecibo 430 MHz Pulsar Polarimetry: Faraday Rotation Measures and Morphological Classifications
• The effect of HII regions on rotation measure of pulsars
• The Linear Polarization of Sagittarius A* I. VLA Spectro-polarimetry at 4.8 and 8.4 GHz
• Multi-frequency polarimetry of the Galactic radio background around 350 MHz: I. A region in Auriga around l = 161, b = 16
• Simulations of Buoyant Bubbles in Galaxy Clusters
• Characteristics of the structure in the Galactic polarized radio background at 350 MHz
• On the role of shock waves in galaxy cluster evolution
• Signatures in a Giant Radio Galaxy of a Cosmological Shock Wave at Intersecting Filaments of Galaxies

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• Evolution of primordial magnetic fields during large-scale structure formation
• The Global Magneto-Ionic Medium Survey: Polarimetry of the Southern Sky from 300 to 480 MHz
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