The intergalactic magnetic field probed by a giant radio galaxy

Abstract

Cosmological simulations predict that an intergalactic magnetic field (IGMF) pervades the large scale structure (LSS) of the Universe. Measuring the IGMF is important to determine its origin (i.e. primordial or otherwise). Using data from the LOFAR Two Metre Sky Survey (LoTSS), we present the Faraday rotation measure (RM) and depolarisation properties of the giant radio galaxy J1235+5317, at a redshift of $z=0.34$ and 3.38 Mpc in size. We find a mean RM difference between the lobes of $2.5\pm 0.1$ rad/m${}^2$ , in addition to small scale RM variations of ~0.1 rad/m${}^2$ . From a catalogue of LSS filaments based on optical spectroscopic observations in the local universe, we find an excess of filaments intersecting the line of sight to only one of the lobes. Associating the entire RM difference to these LSS filaments leads to a gas density-weighted IGMF strength of ~0.3 μG. However, direct comparison with cosmological simulations of the RM contribution from LSS filaments gives a low probability (~5%) for an RM contribution as large as 2.5 rad/m${}^2$ , for the case of IGMF strengths of 10 to 50 nG. It is likely that variations in the RM from the Milky Way (on 11' scales) contribute significantly to the mean RM difference, and a denser RM grid is required to better constrain this contribution. In general, this work demonstrates the potential of the LOFAR telescope to probe the weak signature of the IGMF. Future studies, with thousands of sources with high accuracy RMs from LoTSS, will enable more stringent constraints on the nature of the IGMF.

12 pages, 6 figures, 3 tables. This paper is part of the LOFAR surveys data release 1 and has been accepted for publication in a special edition of A&A that will appear in Feb 2019, volume 622. The catalogues and images from the data release will be publicly available on lofar-surveys.org upon publication of the journal

References in corpus (48)

• Astrophysics Source Code Library
• WSClean: an implementation of a fast, generic wide-field imager for radio astronomy
• The LOFAR Two-metre Sky Survey - I. Survey Description and Preliminary Data Release
• The LOFAR Two-metre Sky Survey - II. First data release
• Turbulence and Magnetic Fields in the Large Scale Structure of the Universe
• Revised equipartition & minimum energy formula for magnetic field strength estimates from radio synchrotron observations
• The Search for the Missing Baryons at Low Redshift
• Observations of the MIssing Baryons in the warm-hot intergalactic medium
• A GMBCG Galaxy Cluster Catalog of 55,424 Rich Clusters from SDSS DR7
• Estimating extragalactic Faraday rotation
• Radio-loud AGN in the first LoTSS data release: The lifetimes and environmental impact of jet-driven sources
• The LOFAR Two-metre Sky Survey (LoTSS) III. First Data Release: optical/IR identifications and value-added catalogue
• Calibrating High-Precision Faraday Rotation Measurements for LOFAR and the Next Generation of Low-Frequency Radio Telescopes
• Cluster Magnetic Fields from Galactic Outflows
• On the amplification of magnetic fields in cosmic filaments and galaxy clusters
• WISE x SuperCOSMOS photometric redshift catalog: 20 million galaxies over 3pi steradians
• Simulations of extragalactic magnetic fields and of their observables
• The intracluster magnetic field power spectrum in Abell 2382
• Numerical modelling of the lobes of radio galaxies in cluster environments II: Magnetic field configuration and observability
• The Energetics and Lifetimes of Local Radio Active Galactic Nuclei
• Structures of the magnetoionic media around the FR I radio galaxies 3C 31 and Hydra A
• The nature of the low-frequency emission of M51: First observations of a nearby galaxy with LOFAR
• A representative survey of the dynamics and energetics of FRII radio galaxies
• The LOFAR Two-metre Sky Survey IV. First Data Release: Photometric redshifts and rest-frame magnitudes
• Low frequency observations of linearly polarized structures in the interstellar medium near the south Galactic pole
• The effect of the ionosphere on ultra-low frequency radio-interferometric observations
• On the relationship between a giant radio galaxy MSH 05-22 and the ambient large-scale galaxy structure
• A catalogue of photometric redshifts for the SDSS-DR9 galaxies
• Giant radio galaxies - II. Tracers of large-scale structure
• Relics in galaxy clusters at high radio frequencies
• A method of estimation of the dynamical age of FR II-type radio sources from multifrequency data
• MRC B0319-454: Probing the large-scale structure with a giant radio galaxy
• Observations of a nearby filament of galaxy clusters with the Sardinia Radio Telescope
• LOFAR reveals the giant: a low-frequency radio continuum study of the outflow in the nearby FR I radio galaxy 3C 31
• Polarized point sources in the LOFAR Two-meter Sky Survey: A preliminary catalog
• A multifrequency study of giant radio sources III. Dynamical age vs. spectral age of the lobes of selected sources
• A multifrequency study of giant radio sources I. Low-frequency Giant Metrewave Radio Telescope observations of selected sources
• The new sample of giant radio sources II. Update of optical counterparts, further spectroscopy of identified faint host galaxies, high-frequency radio maps, and polarisation properties of the sources
• Cosmic Magnetism in Centimeter and Meter Wavelength Radio Astronomy
• The POlarised GLEAM Survey (POGS) I: First Results from a Low-Frequency Radio Linear Polarisation Survey of the Southern Sky
• Statistical Techniques for Detecting the Intergalactic Magnetic Field from Large Samples of Extragalactic Faraday Rotation Data
• Observations of the galaxy cluster CIZA J2242.8+5301 with the Sardinia Radio Telescope
• Broadband radio polarimetry of Fornax A, I: Depolarized patches generated by advected thermal material from NGC 1316
• Faraday rotation at low frequencies: magnetoionic material of the large FRII radio galaxy PKS J0636-2036
• An X-ray survey of the 2Jy sample. II: X-ray emission from extended structures
• Dynamical analysis of the complex radio structure in 3C 293: Clues on a rapid jet realignment in X-shaped radio galaxies
• Reliable detection and characterization of low-frequency polarized sources in the LOFAR M51 field
• The XXL Survey: XXXIV. Double irony in XXL-North. A tale of two radio galaxies in a supercluster at z = 0.14

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• Radio galaxies and feedback from AGN jets
• Radio-loud AGN in the first LoTSS data release: The lifetimes and environmental impact of jet-driven sources
• Giant radio galaxies in the LOFAR Two-metre Sky Survey-I
• Ultra-High-Energy Cosmic Rays: The Intersection of the Cosmic and Energy Frontiers
• Discovery of Magnetic Fields Along Stacked Cosmic Filaments as Revealed by Radio and X-Ray Emission
• Differences in Faraday Rotation Between Adjacent Extragalactic Radio Sources as a Probe of Cosmic Magnetic Fields
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• The Faraday Rotation Measure Grid of the LOFAR Two-metre Sky Survey: Data Release 2
• Magnetic field evolution in cosmic filaments with LOFAR data
• Polarisation of Radio Relics in Galaxy Clusters
• Low-frequency monitoring of flare star binary CR Draconis: Long-term electron-cyclotron maser emission
• Detecting shocked intergalactic gas with X-ray and radio observations
• A survey of the thermal and non-thermal properties of cosmic filaments
• Attention-gating for improved radio galaxy classification
• Constraints on Large-Scale Magnetic Fields in the Intergalactic Medium Using Cross-Correlation Methods
• The LOFAR view of intergalactic magnetic fields with giant radio galaxies
• The detection of cluster magnetic fields via radio source depolarisation
• Primordial magnetic field generation via primordial black hole disks
• Untangling cosmic magnetic fields: Faraday tomography at metre wavelengths with LOFAR
• Low-frequency observations of the Giant Radio Galaxy NGC 6251
• The MeerKAT Fornax Survey IV. A close look at the cluster physics through the densest rotation measure grid
• A low frequency study of linear polarization in radio galaxies
• The dispersion measure and rotation measure from fast radio burst host galaxies based on the IllustrisTNG50 simulation
• Search and analysis of giant radio galaxies with associated nuclei (SAGAN) IV. Interplay with the Supercluster environment
• LOFAR Deep Fields: Probing a broader population of polarized radio galaxies in ELAIS-N1
• Evidence for strong intracluster magnetic fields in the early Universe
• A search for inter-cluster filaments with LOFAR and eROSITA
• Simulating the LOcal Web (SLOW) -- III: Synchrotron emission from the local cosmic web
• On the alignment of haloes, filaments and magnetic fields in the simulated cosmic web
• Filamentary Baryons and Where to Find Them: A forecast of synchrotron radiation from merger and accretion shocks in the local Cosmic Web
• A new limit on intergalactic magnetic fields on sub-kpc scales from fast radio bursts
• Stacking the Synchrotron Cosmic Web with FIGARO
• Properties of Polarized Synchrotron Emission from Fluctuation Dynamo Action -- II. Effects of Turbulence Driving in the ICM and Beam Smoothing
• Searching for the Synchrotron Cosmic Web Again: A replication attempt
• A Novel Method for Estimating the Ambient Medium Density Around Distant Radio Sources from Their Observed Radio Spectra
• Searching for photon-ALPs mixing effects in AGN gamma-ray energy spectra
• Constraints on the magnetic field in the inter-cluster bridge A399-A401
• Exploring Faraday rotation signatures and population bounds for primordial magnetic black holes
• LOFAR Deep Fields: Probing the sub-mJy regime of polarized extragalactic sources in ELAIS-N1. II. Analysis
• Limits on Dark Matter Annihilation from the Shape of Radio Emission in M31
• Discovery of 178 Giant Radio Galaxies in 1059 deg${}^2$ of the Rapid ASKAP Continuum Survey at 888 MHz
• The challenge of detecting intracluster filaments with Faraday Rotation
• Workshop summary 'The Power of Faraday Tomography'