Evidence for strong extragalactic magnetic fields from Fermi observations of TeV blazars

Abstract

Magnetic fields in galaxies are produced via the amplification of seed magnetic fields of unknown nature. The seed fields, which might exist in their initial form in the intergalactic medium, were never detected. We report a lower bound $B\ge 3\times 10^{-16}$~gauss on the strength of intergalactic magnetic fields, which stems from the nonobservation of GeV gamma-ray emission from electromagnetic cascade initiated by tera-electron volt gamma-ray in intergalactic medium. The bound improves as ${\lambda }_B^{-1/2}$ if magnetic field correlation length, ${\lambda }_B$, is much smaller than a megaparsec. This lower bound constrains models for the origin of cosmic magnetic fields.

14 pages, 3 figures

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• Detectability of ultrahigh energy cosmic ray signatures in gamma rays
• Magnetic Field Effect on Charged Scalar Pair Creation at Finite Temperature
• Magnetogenesis at Cosmic Dawn: Tracing the Origins of Cosmic Magnetic Fields
• UHECR mass composition at highest energies from anisotropy of their arrival directions
• Effect of axion-like particles on the spectrum of the extragalactic gamma-ray background
• New probe of magnetic fields in the prereionization epoch. I. Formalism
• Testing Lorentz Invariance with Neutrinos from Ultrahigh Energy Cosmic Ray Interactions
• Can we constrain the extragalactic magnetic field from very high energy observations of GRB 190114C?
• Role of matter in gravitation: going beyond the Einstein-Maxwell theory
• Magnetic reheating
• Suppression of the TeV pair-beam plasma instability by a tangled weak intergalactic magnetic field
• The First Stars: formation under cosmic ray feedback
• Dark Matter Minihalos from Primordial Magnetic Fields
• Constraining Primordial Magnetic Fields by CMB Photon-Graviton Conversion
• Cosmogenic gamma-ray and neutrino fluxes from blazars associated with IceCube events
• Limits on primordial magnetic fields from primordial black hole abundance
• The rotation measures of high luminosity sources as seen from the NVSS
• Parker Bound and Monopole Pair Production from Primordial Magnetic Fields
• Hypermagnetic helicity evolution in early universe: leptogenesis and hypermagnetic diffusion
• Evolution of axions in the presence of primordial magnetic fields
• Redshift estimates for fast radio bursts and implications on intergalactic magnetic fields
• Prospects for future very high-energy gamma-ray sky survey: impact of secondary gamma rays
• Probing the reheating phase through primordial magnetic field and CMB
• Inflationary magnetogenesis with helical coupling
• Schwinger production of scalar particles during and after inflation from the first principles
• A short survey of matter-antimatter evolution in the primordial universe
• Brane matter, hidden or mirror matter, their various avatars and mixings: many faces of the same physics
• Primordial magnetic fields: consistent initial conditions and impact on high-z structures
• Synchrotron pair halo and echo emission from blazars in the cosmic web: application to extreme TeV blazars
• Mode Spectrum of the Electromagnetic Field in Open Universe Models
• Fast magnetic field amplification in the early Universe: growth of collisionless plasma instabilities in turbulent media
• On the nature of LOFAR RMs and new constraints on magnetic fields in cosmic filaments and on magnetogenesis scenarios
• The Parity Odd Universe, Dark Energy and QCD
• Simulating relic gravitational waves from inflationary magnetogenesis
• A precise numerical estimation of the magnetic field generated around recombination
• Mean Energy Density of Photogenerated Magnetic Fields Throughout the Epoch of Reionization
• Discovery of Very High Energy Gamma Rays from 1ES 1440+122
• Simulations of galactic dynamos
• Gradient expansion formalism for magnetogenesis in the kinetic coupling model
• Sensitivity reach of gamma-ray measurements for strong cosmological magnetic fields
• Magnetic fields do not suppress global star formation in low metallicity dwarf galaxies
• Hints of Primordial Magnetic Fields at Recombination and Implications for the Hubble Tension
• Impact of Plasma Instability on Constraint of the Intergalactic Magnetic Field
• Bow Ties in the Sky II: Searching for Gamma-ray Halos in the Fermi Sky Using Anisotropy
• Inflation Driven by Non-Linear Electrodynamics
• Inflationary dynamics of kinetically-coupled gauge fields
• Warm inflation in the presence of magnetic fields
• Lattice simulations of axion-U(1) inflation: gravitational waves, magnetic fields, and scalar statistics
• Energetics of turbulence generated by chiral MHD dynamos
• Resistively controlled primordial magnetic turbulence decay
• Theoretical Estimates of 2-point Shear Correlation Functions Using Tangled Magnetic Field Power Spectrum
• Cosmic magnetization in curved and Lorentz violating space-times
• Do intergalactic magnetic fields imply an open universe?
• The effects of the U${}_{\text{Y}}$(1) Chern-Simons term and its baryonic contribution on matter asymmetries and hypermagnetic fields
• Modified Magnetohydrodynamics Around the Electroweak Transition
• Generation of magnetic fields in Einstein-Aether gravity
• Magnetic fields and chiral asymmetry in the early hot universe
• Fundamental Implications of Intergalactic Magnetic Field Observations
• Dwarf galaxies as a probe of a primordially magnetized Universe
• Perturbations and non-Gaussianities in three-form inflationary magnetogenesis
• Extragalactic Observatory Science with the ASTRI Mini-Array at the Observatorio del Teide
• Helical magnetic fields from Riemann coupling lead to baryogenesis
• Effects of non-linearities on magnetic field generation
• The evolution of cosmic ray electrons in the cosmic web: seeding by AGN, star formation and shocks
• The contribution from blazar cascade emission to the extragalactic gamma-ray background: What a role does the extragalactic magnetic field play?
• First constraints on the strength of the extragalactic magnetic field from $\gamma$-ray observations of GRB 221009A
• The amplification of cosmological magnetic fields in Extended $f(T,B)$ Teleparallel Gravity
• Probing the primordial Universe with 21-cm line from cosmic dawn/epoch of reionization
• Leptogenesis in the Symmetric Phase of the Early Universe: Baryon Asymmetry and Hypermagnetic Helicity Evolution
• Constraints on the Intergalactic Magnetic Field from Bow Ties in the Gamma-ray Sky
• Superhorizon magnetic fields
• Primordial magnetic fields generated by the non-adiabatic fluctuations at pre-recombination era
• Magnetic fields near the peripheries of galactic discs
• Modelling the propagation of very-high-energy gamma rays with the CRbeam code: Comparison with CRPropa and ELMAG codes
• SPMHD simulations of Structure Formation
• CMB and matter power spectra from cross correlations of primordial curvature and magnetic fields
• Putting the hadron beam scenario for extreme blazars to the test with the Cherenkov Telescope Array
• Constraints on the extragalactic magnetic field strength from blazar spectra based on 145 months of Fermi-LAT observations
• Magnetogenesis from a rotating scalar: à la scalar chiral magnetic effect
• 21cm fluctuations from primordial magnetic fields
• LiteBIRD Science Goals and Forecasts: Primordial Magnetic Fields
• Completing magnetic field generation from gravitationally coupled electrodynamics with the curvaton mechanism
• Primordial Helical Magnetic Fields from Inflation?
• Linear Vlasov theory of a magnetised, thermally stratified atmosphere
• Baryogenesis from combined Higgs - scalar field inflation
• Reduced bispectrum seeded by helical primordial magnetic fields
• A self-consistent interpretation of the GeV-TeV emission from a distant blazar PKS 1424+240
• Supernova explosions in magnetized, primordial dark matter halos
• A delayed 400 GeV photon from GRB 221009A and implication on the intergalactic magnetic field
• EDGES signal in presence of magnetic fields
• The Intrinsic Gamma-Ray Spectrum of TXS 0506+056: Intergalactic Propagation Effects
• Power spectrum of post-inflationary primordial magnetic fields
• Revision of Faraday rotation measure constraints on the primordial magnetic field using the IllustrisTNG simulation
• Limit on intergalactic magnetic field from ultra-high-energy cosmic ray hotspot in Perseus-Pisces region
• The Dark Magnetism of the Universe
• Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review
• Circumventing the challenges in the choice of the non-conformal coupling function in inflationary magnetogenesis
• Imprints of primordial magnetic fields on intrinsic alignments of galaxies
• A new probe of magnetic fields in the pre-reionization epoch: II. Detectability
• Constraints on the intergalactic magnetic field strength from $\gamma$-ray observations of GRB 221009A
• Parker Bounds on Monopoles with Arbitrary Charge from Galactic and Primordial Magnetic Fields
• Constraining models of Inflationary Magnetogenesis with NANOGrav
• A search for pair halos around active galactic nuclei through a temporal analysis of Fermi-LAT data
• Primordial Magnetism in CMB B-modes
• The influence of primordial magnetic fields on the spherical collapse model in cosmology
• Chirality production during axion inflation
• Evolution of the cosmic matter density field with a primordial magnetic field
• Magnetic fields during high redshift structure formation
• Baryogenesis via gauge field production from a relaxing Higgs
• Simulating the LOcal Web (SLOW) -- III: Synchrotron emission from the local cosmic web
• Baryogenesis from Decaying Magnetic Helicity in Axiogenesis
• Gravitational wave modes in matter
• Torsion driven Inflationary Magnetogenesis
• Magnetizing the Cosmic Web during Reionization
• A Minimal System Including Weak Sphalerons for Investigating the Evolution of Matter Asymmetries and Hypermagnetic Fields
• Can a marginally open universe amplify magnetic fields?
• Possible formation of ring galaxies by torus-shaped magnetic wormholes
• Evolution of magnetic fields through cosmological perturbation theory
• Dynamics of Electroweak Gauge Fields during and after Higgs Inflation
• Probing stochastic inter-galactic magnetic fields using blazar-induced gamma ray halo morphology
• Vector Galileon and inflationary magnetogenesis
• Monopole acceleration in intergalactic magnetic fields
• Is there supercurvature mode of massive vector field in open inflation?
• Cosmological magnetic braking and the formation of high-redshift, super-massive black holes
• On leptonic models for blazars in the Fermi era
• Inflationary cosmology- A new approach using Non-linear electrodynamics
• Cosmic-Ray Constraints on the Flux of Ultra-High-Energy Neutrino Event KM3-230213A
• Generation of an electromagnetic field nonminimally coupled to gravity during Higgs inflation
• Influence of cosmological models on the GZK horizon of ultrahigh energy protons
• Intergalactic medium rotation measure of primordial magnetic fields
• First Star Formation in the Presence of Primordial Magnetic Fields
• Jetted Active Galactic Nuclei
• Flavon Magneto-Baryogenesis
• Amplification of Magnetic Fields in a Primordial HII Region and Supernova
• Observable spectral and angular distributions of $\gamma$-rays from extragalactic ultrahigh energy cosmic ray accelerators: the case of extreme TeV blazars
• Mechanism for Sequestering Magnetic Energy at Large Scales in Shear-Flow Turbulence
• Inflationary magnetogenesis: solving the strong coupling and its non-Gaussian signatures
• Thermal Sunyaev-Zel'dovich Effect in the IGM due to Primordial Magnetic Fields
• Finding Evidence for Inflation and the Origin of Galactic Magnetic Fields with CMB Surveys
• Magnetogenesis in Higgs inflation
• Primordial Magnetic Fields in Light of Dark Ages Global 21-cm Signal
• Magnetic Field Transfer From A Hidden Sector
• Magnetogenesis from axion-SU(2) inflation
• Primordial Magnetic Helicity from Stochastic Electric Currents
• Signature of stochastic acceleration and cooling processes in an outburst phase of the TeV blazar ON 231
• Search of the pair echo signatures in the high-energy light curve of GRB190114C
• Constraints on Primordial Magnetic Fields from the Lyman-α forest
• Axion-like Particle Effects on Photon Polarization in High-Energy Astrophysics
• Causality, initial conditions, and inflationary magnetogenesis
• Inflationary magnetogenesis with a self-consistent coupling function
• Magnetogenesis in Cyclical Universe
• Kibble mechanism for electroweak magnetic monopoles and magnetic fields
• Anomalous plasma: chiral magnetic effect and all that
• Introduction to Faraday tomography and its future prospects
• Observing the Energetic Universe at Very High Energies with the VERITAS Gamma Ray Observatory
• Search for ultra high energy cosmic rays from radiogalaxy Virgo A
• Bounds on the charge of the graviton using gravitational wave observations
• Hilltop inflation and generation of helical magnetic field
• Gamma-ray halos as a measure of intergalactic magnetic fields: a classical moment problem
• Response to an External Magnetic Field of the Decay Rate of a Neutral Scalar Field into a Charged Fermion Pair
• Stability and Ly$\alpha$ emission of Cold Stream in the Circumgalactic Medium: impact of magnetic fields and thermal conduction
• Probing Reheating Phase via Non-Helical Magnetogenesis and Secondary Gravitational Waves
• Resistive Heating Induced by Streaming Cosmic Rays Around a Galaxy in the Early Universe
• New description of the scaling evolution of the cosmological magneto-hydrodynamic system
• Searching for primordial helical magnetic fields
• Cosmological Ohm's law and dynamics of non-minimal electromagnetism
• Primordial magnetic fields from self-ordering scalar fields
• Astrophysics in Strong Electromagnetic Fields and Laboratory Astrophysics
• Polarised radiative transfer, rotation measure fluctuations and large-scale magnetic fields
• Birefringence of electromagnetic waves in the relic neutrino gas
• A rising tide: Intrinsic alignments since the turn of the millennium
• Matter power spectrum induced by primordial magnetic fields: from the linear to the non-linear regime
• Revisiting primordial magnetic fields through 21-cm physics: Bounds and forecasts
• Matter-antimatter origin of cosmic magnetism
• Magnetic braking during direct collapse black hole formation
• Impact of quantum entanglement induced by magnetic fields on primordial gravitational waves
• Gauge Field Production and Schwinger Reheating in Runaway Axion Inflation
• On the primordial correlation of gravitons with gauge fields
• The effects of non-helical component of hypermagnetic field on the evolution of the matter-antimatter asymmetry, vorticity, and hypermagnetic field
• Dynamics of charged particles and quasi-periodic oscillations in the vicinity of a distorted, deformed compact object embedded in a uniform magnetic field
• Contribution of Secondary Neutrinos from Line-of-sight Cosmic Ray Interactions to the IceCube Diffuse Astrophysical Flux
• Secondary CMB temperature anisotropies from magnetic reheating
• Axion production from primordial magnetic fields
• Constraining brane inflationary magnetic field from cosmoparticle physics after Planck
• Axion-like particles: possible hints and constraints from the high-energy Universe
• Biermann Battery Powered by Resistive Heating Induced by Cosmic Ray Streaming
• Signal in the Hyperfine Structure Line of the Ground State of Atomic Hydrogen from the Dark Ages as a Cosmological Test
• Groundstate projection of the charged SU(2) polarization tensor in a chromomagnetic background field
• A peak in the power spectrum of primordial gravitational waves induced by primordial dark magnetic fields
• Cherenkov telescope array extragalactic survey discovery potential and the impact of axion-like particles and secondary gamma rays
• Vacuum instability due to the creation of neutral Fermion with anomalous magnetic moment by magnetic-field inhomogeneities
• Super-horizon resonant magnetogenesis during inflation
• Seminal magnetic fields from Inflato-electromagnetic Inflation
• Relic Gravitational Waves from the Chiral Plasma Instability in the Standard Cosmological Model
• On the measurement of handedness in Fermi Large Area Telescope data
• Electroweak phase transition in the presence of hypermagnetic field and the generation of gravitational waves
• Spontaneous magnetization of a vacuum in the hot Universe and intergalactic magnetic fields
• Gamma-ray counterparts of 2WHSP high-synchrotron-peaked BL Lac objects as possible signatures of ultra-high-energy cosmic-ray emission
• Cosmological Magnetic Fields from Primordial Kerr-Newman Black Holes
• Anisotropic gravitational waves induced by hypermagnetic fields during the electroweak phase transition epoch
• Spin-Flavor Oscillations of Relic Neutrinos in Primordial Magnetic Field
• Constraint on magnetized galactic outflows from LOFAR rotation measure data
• Cosmological Magnetic Field and Dark Energy as two sides of the same coin
• Inflationary magnetogenesis and non-local actions: The conformal anomaly
• Constraints on Primordial Magnetic Fields from High Redshift Stellar Mass Density
• Radio Observations as a Probe of Cosmic Web Magnetism
• Impact of a primordial magnetic field on cosmic microwave background $B$ modes with weak lensing
• Gravitational Waves sourced by Gauge Fields during Inflation
• Imprints of Schwinger Effect on Primordial Spectra
• Magnetism in the Early Universe
• Non-variable cosmologically distant gamma-ray emitters as an imprint of propagation of ultra-high-energy protons
• Magnetic fields from cosmological bulk flows
• Primordial black holes and magnetic fields in conformal neutrino mass models
• A non-perturbative study of the evolution of cosmic magnetised sources
• Graviton-photon conversion in stochastic magnetic fields
• Detectability of large correlation length inflationary magnetic field with Cherenkov telescopes
• Impact of hypermagnetic fields on relic gravitational waves, neutrino oscillations and baryon asymmetry
• Effective field theory of magnetogenesis identify necessary and sufficient conditions
• Constraints on the magnetic field in the inter-cluster bridge A399-A401
• Recombination era magnetic fields from axion dark matter
• Simulating Electromagnetic Cascades with Lorentz Invariance Violation
• Minimal Magnetogenesis: The Role of Inflationary Perturbations and ALPs, and Its Gravitational Wave Signatures
• Amplifying quantum discord during inflationary magnetogenesis through violation of parity
• Cosmogenic Origin of KM3-230213A: Delayed Gamma-Ray Emission from A Cosmic-Ray Transient
• Prospects for detection of the pair-echo emission from TeV gamma-ray bursts
• Constraining blazar heating with the 2<z<3 Lyman-$\alpha$ forest
• Primordial Magnetic Field Generated in Natural Infation
• Revisiting constraints on primordial magnetic fields from spectral distortions of cosmic microwave background
• Electromagnetic Currents from Electroweak Fermion Level Crossing
• Exploring Faraday rotation signatures and population bounds for primordial magnetic black holes
• Electromagnetic instability induced by neutrino interaction
• Magnetised cosmological perturbations in the post-recombination era
• Spontaneous magnetization of the vacuum and the strength of the magnetic field in the hot Universe
• Suppression of pair beam instabilities in a laboratory analogue of blazar pair cascades
• Seminal Electromagnetic fields from preinflation
• Imprints of the post recombination dissipation of helical magnetic field on the Cosmic Microwave Background Radiation
• Cosmological chirality and magnetic fields from parity violating particle decays
• Induced vacuum magnetic field in the cosmic string background
• Magnetogenesis From Baryon Asymmetry During an Early Matter Dominated Era
• Constraints on the intergalactic magnetic field from Fermi-LAT observations of GRB 221009A
• Revisiting the propagation of highly-energetic gamma rays in the Galaxy
• Analytical models of finite thin disks in a magnetic field
• Generation of cosmic magnetic fields in electroweak plasma
• Spatially open Friedmann--Robertson--Walker Universe fueled with interacting sources
• Nonthermal Radiation of the Extreme TeV Blazar 1ES 0229+200 from Electromagnetic Cascades on Infrared Photon Field
• Gravitational wave signal from primordial magnetic fields in the Pulsar Timing Array frequency band
• Distinguishing Primordial Magnetic Fields from Inflationary Tensor Perturbations in the Cosmic Microwave Background
• Inflationary magnetogenesis of primordial magnetic fields with multiple vector fields
• Distinct photon-ALP propagation modes
• The possibility of multi-TeV secondary gamma rays from GRB221009A
• Theoretical Radio Signals from Radio-Band Gravitational Waves Converted from the Neutron Star Magnetic Field
• Magnetogenesis from Sawtooth Coupling: Gravitational Wave Probe of Reheating
• Recasting Experimental Constraints on Relativistic Magnetic Monopoles
• Can WIMPs Survive the Legacy of a Magnetised Early Universe?
• Neutrinos as a probe of curvature
• Superconducting Dark Matter
• Statistics of the CMB polarised anisotropies
• Intergalactic magnetic field lower limits up to the redshift $z\approx 3$
• Relativistic magnetised perturbations: magnetic pressure vs magnetic tension
• Axion-photon conversion in stochastic magnetic fields
• Primordial magnetic field from chiral plasma instability with sourcing
• Cosmic magnetic fields and dark energy in extended electromagnetism
• Lower bound on the magnetic field strength in the hot universe
• Quarks to Cosmos: Particles and Plasma in Cosmological evolution
• Primordial magnetogenesis before recombination
• Large-Scale Dynamos Driven by Shear-Flow-Induced Jets
• Gravitational waves from the evolution of magnetic field after electroweak epoch
• SU(2) Yang-Mills thermodynamics: a priori estimate and radiative corrections
• Axion-Photon Conversion In Magnetized Universe: Impact On The Global 21-cm Signal
• High Energy Neutrinos and Cosmic Rays
• Simulations of Astrophysically Relevant Pair Beam Instabilities in a Laboratory Context
• MeV cosmic-ray electrons modify the TeV pair-beam plasma instability
• Electromagnetic conversion into kinetic and thermal energies
• Supercooled Audible Axions
• Testing models of extragalactic $\gamma$-ray propagation using observations of extreme blazars in GeV and TeV energy ranges
• Variability of VHE $\gamma$-ray sources
• Kiloparsec-scale turbulence driven by reionization may grow intergalactic magnetic fields
• Revisiting Propagation Delays of Ultra-High-Energy Cosmic Rays from Long-lived Sources
• Magnetic Fields in the Universe
• The H.E.S.S. extragalactic sky
• Magnetic fields from small-scale primordial perturbations
• X-ray polarimetric features of Gamma-ray Bursts across varied redshifts and hints for Axion-Like-Particles
• Short Note on Spin Magnetization in QGP
• Inflation with vector fields revisited: heavy entropy perturbations and primordial black holes
• Imprints of Dark Photons on Gravitational Wave Polarizations
• LISA and $\gamma$-ray telescopes as multi-messenger probes of a first-order cosmological phase transition
• A lower bound on the number of cosmic ray events required to measure source catalogue correlations
• Primordial magnetic non-Gaussianity with generic vacua and detection prospects in CMB spectral distortions
• Thermal leptogenesis in the presence of helical hypermagnetic fields
• Bound-state solutions for the charged Dirac oscillator in a rotating frame in the Bonnor-Melvin-Lambda spacetime
• Primordial magnetic fields in theories of gravity with non-minimal coupling between curvature and matter
• Macroscopic magnetization of primordial plasma by virial shocks
• The Impact of Inhomogeneous Perturbations of the Inflaton on the Cosmological Primordial Magnetic Field
• Towards convergence of turbulent dynamo amplification in cosmological simulations of galaxies
• Ultra-high energy cosmic rays with UFA-15 source model in Bumblebee gravity theory
• Scalar-assisted magnetogenesis during the radiation-dominated epoch
• Modeling the imprints of large-scale magnetized structures on $\gamma$-rays from extragalactic transients
• Kinematic dynamos and resolution limits for Smoothed Particle Magnetohydrodynamics
• Exploring the Voids: Luminosity Functions and Magnetic Field
• Primordial Magnetic Field from Gravitationally Coupled Electrodynamics in Bouncing Scenario
• Sensitivity of the redshifted 21 cm signal from the Dark Ages to parameters of primordial magnetic fields
• Loop contribution to inflationary magnetic field
• Revisiting constraints on magnetogenesis from baryon asymmetry
• Implications of baryon-dark matter interaction on IGM temperature and tSZ effect with magnetic field
• Impact of magnetic field on the gas mass fraction of galaxy clusters
• Global Signals of the First Molecules from the Dark Ages in the Presence of Primordial Magnetic Fields
• Magnetic field in vacuum of quantum spinor matter induced by a cosmic string in three-dimensional space
• High Sensitivity Methodologies to Detect Radio Band Gravitational Waves
• Sensitivity to Axion-like Particle dark matter with very-high-energy gamma-ray observations of Active Galactic Nuclei located behind Galaxy Clusters
• Thermal enhancement of inflationary magnetic fields
• Impacts of Voids, Line of Sight Interactions, and Local Emission Environment on Detectability of Gamma-Ray AGN
• Primordial Magnetogenesis from Killing Vector Fields
• The VHE anomaly in blazar spectra and related phenomena
• Magnetogenesis in non-local models during inflation
• Theory of high-energy messengers
• Primordial magnetic fields in the $f^{2}FF$ model in large field inflation under de Sitter and power law expansion
• Production of relic gravitational waves and the baryon asymmetry of the universe by random hypermagnetic fields