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Can galactic magnetic fields diffuse into the voids?
Oindrila Ghosh, Axel Brandenburg, Chiara Caprini +2
Cosmic voids are magnetized at the level of at least G on Mpc scales, as implied by blazar observations. We show that an electrically conducting plasma is present in the…
Baryon asymmetry constraints on magnetic field from the Electroweak epoch
T. Boyer, A. Neronov
Decay of helical (hyper)magnetic fields that may have been present in the Universe during the Electroweak epoch can contribute to generation of the baryon asymmetry of the Universe…
Pulsar timing array constraints on the cosmological magnetic field from quark confinement epoch
T. Boyer, A. Neronov
Recent evidence for the stochastic gravitational wave backgorund reported by the pulsar timing arrays (PTA) can be interpreted as a signal from the cosmological phase transition. W…
LISA and -ray telescopes as multi-messenger probes of a first-order cosmological phase transition
A. Roper Pol, A. Neronov, C. Caprini +2
We study two possible cosmological consequences of a first-order phase transition in the temperature range of 1 GeV to TeV: the generation of a stochastic gravitational wave…
The second data release from the European Pulsar Timing Array: IV. Implications for massive black holes, dark matter and the early Universe
J. Antoniadis, P. Arumugam, S. Arumugam +111
The European Pulsar Timing Array (EPTA) and Indian Pulsar Timing Array (InPTA) collaborations have measured a low-frequency common signal in the combination of their second and fir…
The contribution of magnetized galactic outflows to extragalactic Faraday rotation
Andres Aramburo-Garcia, Kyrylo Bondarenko, Alexey Boyarsky +3
Galactic outflows driven by star formation and active galactic nuclei blow bubbles into their local environments, causing galactic magnetic fields to be carried into intergalactic…
Revision of Faraday rotation measure constraints on the primordial magnetic field using the IllustrisTNG simulation
Andres Aramburo-Garcia, Kyrylo Bondarenko, Alexey Boyarsky +3
Previously derived Faraday rotation constraints on the volume-filling intergalactic magnetic field (IGMF) have used analytic models that made a range of simplifying assumptions abo…
Gravitational wave signal from primordial magnetic fields in the Pulsar Timing Array frequency band
Alberto Roper Pol, Chiara Caprini, Andrii Neronov +1
The NANOGrav, Parkes, European, and International Pulsar Timing Array (PTA) Collaborations have reported evidence for a common-spectrum process that can potentially correspond to a…
Account of the baryonic feedback effect in gamma-ray measurements of intergalactic magnetic fields
Kyrylo Bondarenko, Alexey Boyarsky, Alexander Korochkin +3
Intergalactic magnetic fields in the voids of the large-scale structure can be probed via measurements of secondary gamma-ray emission from gamma-ray interactions with extragalacti…
NANOGrav signal from MHD turbulence at QCD phase transition in the early universe
A. Neronov, A. Roper Pol, C. Caprini +1
The NANOGrav collaboration has recently reported evidence for the existence of a stochastic gravitational wave background in the 1-100 nHz frequency range. We argue that such backg…
Sensitivity reach of gamma-ray measurements for strong cosmological magnetic fields
A. Korochkin, O. Kalashev, A. Neronov +1
A primordial magnetic field with the strength in the 1-10 pG range can resolve the tension between different measurements of the Hubble constant and provide an explanation for the…
Magnetic Fields in the Large Scale Structure from Faraday Rotation measurements
A. Neronov, D. Semikoz, M. Banafsheh
We search for magnetic fields outside galaxies and galaxy clusters by investigating redshift evolution of Faraday rotation measures (RM) of extragalactic radio sources. Our analysi…
Cosmological Magnetic Fields: Their Generation, Evolution and Observation
R. Durrer, A. Neronov
We review the possible mechanisms for the generation of cosmological magnetic fields, discuss their evolution in an expanding Universe filled with the cosmic plasma and provide a c…
Evolution of Primordial Magnetic Fields from Phase Transitions
Tina Kahniashvili, Alexander G. Tevzadze, Axel Brandenburg +1
We consider the evolution of primordial magnetic fields generated during cosmological, electroweak or QCD, phase transitions. We assume that the magnetic field generation can be de…
Fermi/LAT observations of 1ES 0229+200: implications for extragalactic magnetic fields and background light
Ievgen Vovk, Andrew M. Taylor, Dmitri Semikoz +1
We report the observation in the GeV band of the blazar 1ES 0229+200, which over recent years has become one the primary sources used to put constraints on the Extragalactic Backgr…
Extragalactic Very-High-Energy gamma-ray background
A. Neronov, D. V. Semikoz
We study the origin of the extragalactic diffuse gamma-ray background using the data from the Fermi telescope. To estimate the background level, we count photons at high Galactic l…
INTEGRAL hard X-ray spectra of the cosmic X-ray background and Galactic ridge emission
M. Turler, M. Chernyakova, T. J. -L. Courvoisier +4
We derive the spectra of the cosmic X-ray background (CXB) and of the Galactic ridge X-ray emission (GRXE) in the ~20-200 keV range from the data of the IBIS instrument aboard the…
Sensitivity of gamma-ray telescopes for detection of magnetic fields in intergalactic medium
A. Neronov, D. Semikoz
We explore potential of current and next-generation gamma-ray telescopes for the detection of weak magnetic fields in the intergalactic medium. We demonstrate that using two comple…