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Measuring the properties of extragalactic magnetic fields through the effect of Faraday rotation provides a means to understand the origin and evolution of cosmic magnetism. Here we use data from the LOFAR Two-Metre Sky Survey (LoTSS) to…

Faraday rotation measures (RMs) of extragalactic radio sources provide information on line-of-sight magnetic fields, including contributions from our Galaxy, source environments, and the intergalactic medium (IGM). Looking at differences in…

Cosmology and Nongalactic Astrophysics · Physics 2019-06-26 T. Vernstrom , B. Gaensler , L. Rudnick , H. Andernach

We search for magnetic fields outside galaxies and galaxy clusters by investigating redshift evolution of Faraday rotation measures (RM) of extragalactic radio sources. Our analysis reveals a strong evidence for the redshift dependence of…

Cosmology and Nongalactic Astrophysics · Physics 2013-05-08 A. Neronov , D. Semikoz , M. Banafsheh

We present a catalog of Faraday rotation measures (RMs) and redshifts for 4003 extragalactic radio sources detected at 1.4 GHz, derived by identifying optical counterparts and spectroscopic redshifts for linearly polarized radio sources…

Cosmology and Nongalactic Astrophysics · Physics 2020-04-02 Alison M. Hammond , Timothy Robishaw , B. M. Gaensler

Measuring the magnetic field in cosmic filaments reveals how the Universe is magnetised and the process that magnetised it. Using the Rotation Measures (RM) at 144-MHz from the LoTSS DR2 data, we analyse the rms of the RM extragalactic…

Cosmology and Nongalactic Astrophysics · Physics 2022-10-26 E. Carretti , S. O'Sullivan , V. Vacca , F. Vazza , C. Gheller , T. Vernstrom , A. Bonafede

Faraday rotation (RM) probes of magnetic fields in the universe are sensitive to cosmological and evolutionary effects as $z$ increases beyond $\sim $1 because of the scalings of electron density and magnetic fields, and the growth in the…

Astrophysics · Physics 2009-11-13 P. P. Kronberg , M. L. Bernet , F. Miniati , S. J. Lilly , M. B. Short , D. M. Higdon

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…

Cosmology and Nongalactic Astrophysics · Physics 2025-01-22 E. Carretti , F. Vazza , S. P. O'Sullivan , V. Vacca , A. Bonafede , G. Heald , C. Horellou , S. Mtchedlidze , T. Vernstrom

The Faraday rotation effect, quantified by the Rotation Measure (RM), is a powerful probe of the large-scale magnetization of the Universe - tracing magnetic fields not only on galaxy and galaxy cluster scales but also in the intergalactic…

Determining magnetic field properties in different environments of the cosmic large-scale structure as well as their evolution over redshift is a fundamental step toward uncovering the origin of cosmic magnetic fields. Radio observations…

We used the Rotation Measure (RM) catalogue derived from the LOFAR Two-metre Sky Survey Data Release 2 (LoTSS DR2) at 144-MHz to measure the evolution with redshift of the extragalactic RM (RRM: Residual RM) and the polarization fraction…

Cosmology and Nongalactic Astrophysics · Physics 2022-02-23 E. Carretti , V. Vacca , S. P. O'Sullivan , G. H. Heald , C. Horellou , H. J. A. Rottgering , A. M. M. Scaife , T. W. Shimwell , A. Shulevski , C. Stuardi , T. Vernstrom

The joint analysis of the Dispersion and Faraday Rotation Measure from distant, polarised Fast Radio Bursts may be used to put constraints on the origin and distribution of extragalactic magnetic fields on cosmological scales. While the…

Cosmology and Nongalactic Astrophysics · Physics 2018-07-24 F. Vazza , M. Brüggen , P. M. Hinz , D. Wittor , N. Locatelli , C. Gheller

We study the Faraday rotation measure (RM) due to the Galactic magnetic field (GMF) toward high Galactic latitudes. The RM arises from the global, regular component as well as from the turbulent, random component of the GMF. We model the…

Astrophysics of Galaxies · Physics 2015-06-15 Takuya Akahori , Dongsu Ryu , Jongsoo Kim , B. M. Gaensler

The origin of magnetic fields in clusters of galaxies is still a matter of debate. Observations for intracluster magnetic fields over a wide range of redshifts are crucial to constrain possible scenarios for the origin and evolution of the…

Cosmology and Nongalactic Astrophysics · Physics 2022-02-23 J. Xu , J. L. Han

We present a new approach for extracting information about cosmic magnetic fields using cross-correlations between extragalactic Faraday rotation measure (RM) catalogs and galaxy surveys. Specifically, we propose measuring the two-point…

Cosmology and Nongalactic Astrophysics · Physics 2025-12-09 Zekai Zhang , Adam Lidz

We investigate the Faraday rotation measure (RM) due to the intergalactic magnetic field (IGMF) through the cosmic web up to cosmological distances, using a model IGMF based on turbulence dynamo in the large-scale structure of the universe.…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 Takuya Akahori , Dongsu Ryu

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 space. We explore the redshift-dependent effect of these…

Cosmology and Nongalactic Astrophysics · Physics 2023-01-18 Andres Aramburo-Garcia , Kyrylo Bondarenko , Alexey Boyarsky , Andrii Neronov , Anna Scaife , Anastasia Sokolenko

We analyze the redshift evolution of the Rotation Measure (RM) in Taylor et al. (2009) dataset, which is based on NVSS radio data at 21 cm, and compare with results from our previous work (Kronberg et al. (2008), Bernet et al.…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-11 M. L. Bernet , F. Miniati , S. J. Lilly

We obtained rotation measures of 2642 quasars by cross-identification of the most updated quasar catalog and rotation measure catalog. After discounting the foreground Galactic Faraday rotation of the Milky Way, we get the residual rotation…

Cosmology and Nongalactic Astrophysics · Physics 2014-07-29 J. Xu , J. L. Han

(Abridged) This paper introduces the formalism which connects between rotation measure ($\RM$) measurements for extragalactic sources and the cosmological magnetic field power spectrum. It is shown that the amplitude and shape of the…

Astrophysics · Physics 2016-08-30 Tsafrir Kolatt

Radio observations have revealed magnetic fields in the intracluster medium (ICM) of galaxy clusters nearly in equipartition with turbulence. This suggests magnetic field amplification by dynamo processes. However, observations are limited…

Cosmology and Nongalactic Astrophysics · Physics 2024-09-30 Yoan Rappaz , Jennifer Schober , Abhijit Bhausaheb Bendre , Amit Seta , Christoph Federrath
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