On the nature of LOFAR RMs and new constraints on magnetic fields in cosmic filaments and on magnetogenesis scenarios

Abstract

The measurement of magnetic fields in cosmic web filaments can be used to reveal the magnetogenesis of the Universe. In previous work, we produced first estimates of the field strength and its redshift evolution using the Faraday Rotation Measure (RM) catalogue of extragalactic background sources at low frequency obtained with LOFAR observations. Here we refine our analysis by selecting sources with low Galactic RM, which reduces its residual contamination. We also conduct a comprehensive analysis of the different contributions to the extragalactic RMs along the line of sight, and confirm that they are dominated by the cosmic filaments component, with only 21 percent originating in galaxy clusters and the circumgalactic medium (CGM) of galaxies. We find a possible hint of a shock at the virial radius of massive galaxies. We also find that the fractional polarization of background sources might be a valuable CGM tracer. The newly selected RMs have a steeper evolution with redshift than previously found. The field strength in filaments ($B_f$) and its evolution are estimated assuming $B_f$ evolves as a power-law $B_f=B_{f,0}(1+z{)}^{\alpha }$. Our analysis finds an average strength at $z=0$ of $B_{f,0}=11$--15~nG, with an error of 4 nG, and a slope $\alpha =2.3$--$2.6\pm 0.5$, which is steeper than what we previously found. The comoving field has a slope of $\beta =$ [0.3, 0.6$]\pm 0.5$ that is consistent with being invariant with redshift. Primordial magnetogenesis scenarios are favoured by our data, together with a sub-dominant astrophysical-origin RM component increasing with redshift.

arXiv commentAccepted for publication on A&A

References in corpus (78)

• Array Programming with NumPy
• Astropy: A Community Python Package for Astronomy
• emcee: The MCMC Hammer
• Planck 2015 results. XIII. Cosmological parameters
• HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
• The Global Schmidt Law in Star Forming Galaxies
• LOFAR: The LOw-Frequency ARray
• Evidence for strong extragalactic magnetic fields from Fermi observations of TeV blazars
• The GMRT 150 MHz All-sky Radio Survey: First Alternative Data Release TGSS ADR1
• Faraday Rotation Measure Synthesis
• The LOFAR Two-metre Sky Survey -- V. Second data release
• The origin, evolution and signatures of primordial magnetic fields
• Turbulence and Magnetic Fields in the Large Scale Structure of the Universe
• Strong magnetic fields in normal galaxies at high redshifts
• On the Origin of the Global Schmidt Law of Star Formation
• Stellar Masses and SFRs for 1M Galaxies from SDSS and WISE
• The stellar-to-halo mass relation over the past 12 Gyr
• Estimating extragalactic Faraday rotation
• A Global Probe of Cosmic Magnetic Fields to High Redshifts
• Cluster Magnetic Fields from Galactic Outflows
• Calibration of the optical mass proxy for clusters of galaxies and an update of the WHL12 cluster catalog
• Magnetic Field Seeding by Galactic Winds
• Progress on Cosmological Magnetic Fields
• Simulations of extragalactic magnetic fields and of their observables
• A radio spectral index map and catalogue at 147-1400 MHz covering 80 per cent of the sky
• MusE GAs FLOw and Wind (MEGAFLOW) III: galactic wind properties using background quasars
• Structures of the magnetoionic media around the FR I radio galaxies 3C 31 and Hydra A
• Simulated X-ray galaxy clusters at the virial radius: slopes of the gas density, temperature and surface brightness profiles
• The X-ray Halo Scaling Relations of Supermassive Black Holes
• The SINFONI MgII Program for Line Emitters (SIMPLE): Discovering starbursts near QSO sight-lines
• Discovery of Magnetic Fields Along Stacked Cosmic Filaments as Revealed by Radio and X-Ray Emission
• New Perspective on Galaxy Outflows From the First Detection of Both Intrinsic and Traverse Metal-Line Absorption
• Differences in Faraday Rotation Between Adjacent Extragalactic Radio Sources as a Probe of Cosmic Magnetic Fields
• Faraday Rotation Measure due to the Intergalactic Magnetic Field II: the Cosmological Contribution
• Low Frequency Radio Constraints on the Synchrotron Cosmic Web
• Faraday Rotation from Magnesium II Absorbers towards Polarized Background Radio Sources
• Fractional polarization and magnetic fields in the ICM
• Magnetic field strength in cosmic web filaments
• Limiting Magnetic Fields in the Cosmic Web with Diffuse Radio Emission
• The Galactic Faraday depth sky revisited
• The Faraday Rotation Measure Grid of the LOFAR Two-metre Sky Survey: Data Release 2
• Constraints on the intergalactic magnetic field using Fermi-LAT and H.E.S.S. blazar observations
• Magnetic field evolution in cosmic filaments with LOFAR data
• Observations of a nearby filament of galaxy clusters with the Sardinia Radio Telescope
• Detection of magnetic fields in the circumgalactic medium of nearby galaxies using Faraday rotation
• Origin of Magnetic Field in the Intracluster Medium: Primordial or Astrophysical?
• Magnetization of the intergalactic medium in the IllustrisTNG simulations: the importance of extended, outflow-driven bubbles
• Constraints on primordial magnetic fields from magnetically-induced perturbations: current status and future perspectives with LiteBIRD and future ground based experiments
• Constraints on Large-Scale Magnetic Fields in the Intergalactic Medium Using Cross-Correlation Methods
• Improved CMB anisotropy constraints on primordial magnetic fields from the post-recombination ionization history
• Faraday Rotation Measure Synthesis of intermediate redshift quasars as a probe of intervening matter
• Magnetic field disorder and Faraday effects on the polarization of extragalactic radio sources
• Evolution of primordial magnetic fields during large-scale structure formation
• The POlarised GLEAM Survey (POGS) II: Results from an All-Sky Rotation Measure Synthesis Survey at Long Wavelengths
• S-PASS/ATCA: a window on the magnetic universe in the southern hemisphere
• The detection of cluster magnetic fields via radio source depolarisation
• Mapping "out-of-the-box" the properties of the baryons in massive halos
• Simulations and observational tests of primordial magnetic fields from Cosmic Microwave Background constraints
• Large-Scale Star Formation-Driven Outflows at 1<z<2 in the 3D-HST Survey
• Polarized accretion shocks from the cosmic web
• New constraints on the magnetic field in filaments of the cosmic web
• MgII absorption systems with W_0 > 0.1 Åfor a radio selected sample of 77 QSOs and their associated magnetic fields at high redshifts
• On the redshift evolution of the baryon and gas fraction in simulated groups and clusters of galaxies
• Role of intervening Mg II absorbers on the rotation measure and fractional polarisation of the background quasars
• Account of the baryonic feedback effect in gamma-ray measurements of intergalactic magnetic fields
• Dependence of Residual Rotation Measure (RRM) on Intervening MgII Absorbers at Cosmic Distances
• Radio Polarization Properties of Quasars and Active Galaxies at High Redshifts
• Probing magnetic fields in the circumgalactic medium using polarization data from MIGHTEE
• The Apertif science verification campaign - Characteristics of polarised radio sources
• A search for inter-cluster filaments with LOFAR and eROSITA
• Revision of Faraday rotation measure constraints on the primordial magnetic field using the IllustrisTNG simulation
• Discovery of a >13 Mpc long X-ray filament between two galaxy clusters beyond three times their virial radii
• Constraints on the intergalactic magnetic field strength from $\gamma$-ray observations of GRB 221009A
• The contribution of magnetized galactic outflows to extragalactic Faraday rotation
• A new limit on intergalactic magnetic fields on sub-kpc scales from fast radio bursts
• Excess cataloged X-ray and radio sources at galaxy-cluster virial shocks
• Constraint on magnetized galactic outflows from LOFAR rotation measure data
• Strong gravitational lensing of blazar gamma-radiation and intergalactic magnetic fields

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