Constraining Magnetic Fields in the Circumgalactic Medium

Abstract

We study the properties of magnetic fields in the circumgalactic medium (CGM) of $z<1$ galaxies by correlating Faraday rotation measures of $\sim 1,000$ high-redshift radio sources with the foreground galaxy number density estimated from the DESI Legacy Imaging Surveys. This method enables us to extract signals of rotation measures contributed by intervening gas around multiple galaxies. Our results show that there is no detectable correlation between the distribution of rotation measures and the number of foreground galaxies, contrary to several previous results. Utilizing the non-detection signals, we estimate $3\sigma$ upper limits to the rotation measures from the CGM of $\sim 20rad/{\mathrm{m}}^2$ within~50 kpc and $\sim 10rad/{\mathrm{m}}^2$ at separations of $100$ kpc. By adopting a column density distribution of ionized gas obtained from absorption line measurements, we further estimate the strengths of coherent magnetic fields parallel to the line of sight of $<2\mu \mathrm{G}$ in the CGM. We show that the estimated upper limits of rotation measures and magnetic field strengths are sufficient to constrain outputs of recent galaxy magneto-hydrodynamic simulations. Finally, we discuss possible causes for the inconsistency between our results and previous works.

12 pages, 10 figures, MNRAS accepted

References in corpus (74)

• Stellar population synthesis at the resolution of 2003
• Galactic Stellar and Substellar Initial Mass Function
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• LOFAR: The LOw-Frequency ARray
• Overview of the DESI Legacy Imaging Surveys
• CIGALE: a python Code Investigating GALaxy Emission
• The Circumgalactic Medium
• First results from the IllustrisTNG simulations: radio haloes and magnetic fields
• The COS-Halos Survey: Physical Conditions and Baryonic Mass in the Low-Redshift Circumgalactic Medium
• The Cosmic Energy Inventory
• Magnetic Fields in Spiral Galaxies
• Turbulence and Magnetic Fields in the Large Scale Structure of the Universe
• The COS-Halos Survey: Rationale, Design, and A Census of Circumgalactic Neutral Hydrogen
• The DESI Experiment, a whitepaper for Snowmass 2013
• Science with the Square Kilometer Array: Motivation, Key Science Projects, Standards and Assumptions
• The radial and azimuthal profiles of Mg II absorption around 0.5 < z < 0.9 zCOSMOS galaxies of different colors, masses and environments
• Simulations of magnetic fields in isolated disk galaxies
• Strong magnetic fields in normal galaxies at high redshifts
• An Empirical Characterization of Extended Cool Gas Around Galaxies Using MgII Absorption Features
• The low density and magnetization of a massive galaxy halo exposed by a fast radio burst
• The COS-Halos Survey: Metallicities in the Low-Redshift Circumgalactic Medium
• Characterizing the Circumgalactic Medium of Nearby Galaxies with HST/COS and HST/STIS Absorption-Line Spectroscopy
• An improved map of the Galactic Faraday sky
• Magnetized Gas Clouds can Survive Acceleration by a Hot Wind
• Cosmological simulations of the circumgalactic medium with 1 kpc resolution: enhanced HI column densities
• Project Overview of the Beijing-Arizona Sky Survey
• Tracing Outflows and Accretion: A Bimodal Azimuthal Dependence of MgII Absorption
• The Impact of Enhanced Halo Resolution on the Simulated Circumgalactic Medium
• The Clustering of DESI-like Luminous Red Galaxies Using Photometric Redshifts
• The abundance, distribution, and physical nature of highly ionized oxygen OVI, OVII, and OVIII in IllustrisTNG
• Resolving small-scale cold circumgalactic gas in TNG50
• Estimating extragalactic Faraday rotation
• Information field theory for cosmological perturbation reconstruction and non-linear signal analysis
• MAGIICAT II. General Characteristics of the MgII Absorbing Circumgalactic Medium
• A Global Probe of Cosmic Magnetic Fields to High Redshifts
• MusE GAs FLOw and Wind (MEGAFLOW) III: galactic wind properties using background quasars
• The circumgalactic medium of eBOSS emission line galaxies: signatures of galactic outflows in gas distribution and kinematics
• Detection of microgauss coherent magnetic fields in a galaxy five billion years ago
• Role of Cosmic Rays in the Circumgalactic Medium
• Rotation Measures of Radio Sources in Hot Galaxy Clusters
• COS-Burst: Observations of the Impact of Starburst-Driven Winds on the Properties of the Circum-Galactic Medium
• Cosmic-Ray Driven Outflows to Mpc Scales from $L_{\ast }$ Galaxies
• The impact of magnetic fields on thermal instability
• New constraints on the magnetization of the cosmic web using LOFAR Faraday rotation observations
• Magnetising the circumgalactic medium of disk galaxies
• The properties of the cool circumgalactic gas probed with the SDSS, WISE and GALEX surveys
• Faraday Rotation Measure due to the Intergalactic Magnetic Field
• The Properties of the Circumgalactic Medium in Red and Blue Galaxies: Results from the COS-GASS+COS-Halos Surveys
• Differences in Faraday Rotation Between Adjacent Extragalactic Radio Sources as a Probe of Cosmic Magnetic Fields
• Magnetic fields in nearby normal galaxies: Energy equipartition
• Baryon Budget of the Hot Circumgalactic Medium of Massive Spiral Galaxies
• Faraday Rotation from Magnesium II Absorbers towards Polarized Background Radio Sources
• On the model of the circumgalactic mist: the implications of cloud sizes in galactic winds and halos
• Calcium H & K Induced by Galaxy Halos
• Mg II absorbers: metallicity evolution and cloud morphology
• The impact of magnetic fields on cold streams feeding galaxies
• The interpretation of Rotation Measures in the presence of inhomogeneous foreground screens
• Galaxies Probing Galaxies in PRIMUS - II. The Coherence Scale of the Cool Circumgalactic Medium
• Detection of missing baryons in galaxy groups with kinetic Sunyaev-Zel'dovich effect
• Faraday Rotation Measure Synthesis of intermediate redshift quasars as a probe of intervening matter
• Probing the origin of extragalactic magnetic fields with Fast Radio Bursts
• The LOFAR view of intergalactic magnetic fields with giant radio galaxies
• Redshift evolution of extragalactic rotation measures
• Spatially Resolved Metal Gas Clouds
• On the CGM Fundamental Plane: The Halo Mass Dependency of Circumgalactic HI
• A compiled catalog of rotation measures of radio point sources
• Reconstructing signals from noisy data with unknown signal and noise covariance
• A New Catalog of Faraday Rotation Measures and Redshifts for Extragalactic Radio Sources
• MgII absorption systems with W_0 > 0.1 Åfor a radio selected sample of 77 QSOs and their associated magnetic fields at high redshifts
• Exploring the Physical Properties of the Cool Circumgalactic Medium with a Semi-Analytic Model
• Role of intervening Mg II absorbers on the rotation measure and fractional polarisation of the background quasars
• Dependence of Residual Rotation Measure (RRM) on Intervening MgII Absorbers at Cosmic Distances
• Observed Faraday Effects in Damped Lyman-Alpha Absorbers and Lyman Limit Systems: The Magnetised Environment of Galactic Building Blocks at Redshift=2
• Magnetic Fields in the Large Scale Structure from Faraday Rotation measurements

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• Detection of magnetic fields in the circumgalactic medium of nearby galaxies using Faraday rotation
• Constraints on Large-Scale Magnetic Fields in the Intergalactic Medium Using Cross-Correlation Methods
• The Eddington ratio-dependent changing look events in NGC 2992
• Magnetic Fields on FIRE: Comparing B-fields in the multiphase ISM and CGM of Simulated L${}_{\ast }$ Galaxies to Observations
• Probing magnetic fields in the circumgalactic medium using polarization data from MIGHTEE
• Magnetic fields in elliptical galaxies: an observational probe of the fluctuation dynamo action
• Magnetic fields in elliptical galaxies: Using the Laing-Garrington effect in radio galaxies and polarized emission from background radio sources
• A kiloparsec-scale ordered magnetic field in a galaxy at z=5.6
• Deep Synoptic Array Science: Implications of Faraday Rotation Measures of Localized Fast Radio Bursts
• Stability and Ly$\alpha$ emission of Cold Stream in the Circumgalactic Medium: impact of magnetic fields and thermal conduction
• Modeling Photoionized Turbulent Material in the Circumgalactic Medium III: Effects of Co-rotation and Magnetic Fields
• Cold fronts in galaxy clusters I: A case for the large-scale global eigen modes in unmagnetized and weakly magnetized cluster core
• Investigation of the Radial Profile of Galactic Magnetic Fields using Rotation Measure of Background Quasars
• Magnetised CGM Gas at z~1 revealed by SPICE-RACS
• Magnetic fields in galactic environments probed by Fast Radio Bursts
• Constraints on cosmic rays in the Milky Way circumgalactic medium from OVIII observations