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Recent catalog of Faraday rotation measures (RM) of extragalactic sources together with the synchrotron polarization data from WMAP and Planck provides us with a wealth of information on magnetic fields of the Galaxy. However, the integral…

Astrophysics of Galaxies · Physics 2025-01-29 Alexander Korochkin , Dmitri Semikoz , Peter Tinyakov

Using the linearly polarized intensity and polarization angle data at 3.6, 6.2 and 20 cm, we determine variations of Faraday rotation and depolarization across the nearby galaxy M33. A 3-D model of the regular magnetic field is fitted to…

Astrophysics · Physics 2009-11-13 F. S. Tabatabaei , M. Krause , A. Fletcher , R. Beck

Interstellar magnetic fields play critical roles in many astrophysical processes. Yet despite their importance, our knowledge about magnetic fields in our Galaxy remains limited. For the field within the Milky Way, much of what we do know…

Astrophysics of Galaxies · Physics 2010-12-15 Cameron Van Eck , Jo-Anne Brown

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 properties of the Galactic ISM by applying Faraday tomography to a radio polarization data set in the direction of the Galactic anti-centre. We address the problem of missing large-scale structure in our data, and show…

Astrophysics · Physics 2015-05-13 D. H. F. M. Schnitzeler , P. Katgert , A. G. de Bruyn

Faraday rotation is one of the most widely used observables to infer the strength and configuration of the magnetic field in the ionised gas of the Milky Way and nearby spiral galaxies. Here we compute synthetic Faraday rotation maps at…

The Galactic magnetic field is important in the dynamics of our Galaxy. It is believed to play a role in star formation and influence the structure of the Galaxy. In order to understand how the Galactic magnetic field originally formed or…

Astrophysics of Galaxies · Physics 2010-12-15 Kyle Rae , Jo-Anne Brown

We investigate the distribution and properties of Faraday rotating and synchrotron emitting regions in the Galactic ISM in the direction of the Galactic anti-centre. We apply Faraday tomography to a radio polarization dataset that we…

Astrophysics · Physics 2015-05-13 D. H. F. M. Schnitzeler , P. Katgert , A. G. de Bruyn

(abridged) We suggest here that the large scale fields $\sim \mu$G, observed in galaxies at both high and low redshifts by Faraday Rotation Measurements (FRMs), have their origin in the electromagnetic fluctuations that naturally occurred…

Astrophysics · Physics 2008-11-26 Rafael S. de Souza , Reuven Opher

We have observed 37 bright, polarized radio sources with the Allen Telescope Array (ATA) to present a novel analysis of their Faraday rotation properties. Each source was observed during the commissioning phase with 2 to 4 100-MHz bands at…

Magnetic fields significantly influence the structure of galaxies' interstellar media, but our understanding of magnetic field strengths and structures in external galaxies is severely limited. The Large Magellanic Cloud (LMC) offers a…

Astrophysics of Galaxies · Physics 2025-05-30 Hilay Shah , Mark Krumholz , Naomi McClure-Griffiths

The contribution from the residuals of the foreground can have a significant impact on the temperature maps of the Cosmic Microwave Background (CMB). Mostly, the focus has been on the galactic plane, when foreground cleaning has taken…

Cosmology and Nongalactic Astrophysics · Physics 2013-09-27 M. Hansen , W. Zhao , A. M. Frejsel , P. D. Naselsky , J. Kim , O. V. Verkhodanov

With the rapid increase of fast radio burst (FRB) detections within the past few years, there is now a catalogue being developed for all-sky extragalactic dispersion measure (DM) observations in addition to the existing collection of…

Astrophysics of Galaxies · Physics 2022-08-31 Ayush Pandhi , Sebastian Hutschenreuter , Jennifer West , Bryan Gaensler , Ashley Stock

We present spectropolarimetric radio images of the supernova remnant (SNR) G296.5+10.0 at frequencies near 1.4 GHz, observed with the Australia Telescope Compact Array. By applying rotation measure (RM) synthesis to the data, a…

Astrophysics of Galaxies · Physics 2015-05-18 L. Harvey-Smith , B. M. Gaensler , R. Kothes , R. Townsend , G. H. Heald , C. -Y. Ng , A. J. Green

We utilized the Very Large Array to make multifrequency polarization measurements of 20 radio sources viewed through the IC 1805 HII region and "Superbubble", as well as in the immediate vicinity. The measurements at frequencies between…

Astrophysics of Galaxies · Physics 2018-09-24 Allison H. Costa , Steven R. Spangler

The presence of a helical magnetic field threading the jet of an Active Galactic Nucleus (AGN) should give rise to a gradient in the observed Faraday rotation measure (RM) across the jet, due to the associated systematic change in the…

Astrophysics of Galaxies · Physics 2015-05-20 Denise C. Gabuzda , Sebastian Knuettel , Brendan Reardon

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

Much of the information about the magnetic field in the Milky Way and other galaxies comes from measurements which are path integrals, such as Faraday rotation and the polarization of synchrotron radiation of cosmic ray electrons. The…

Astrophysics of Galaxies · Physics 2021-01-05 Steven R. Spangler

Faraday rotation measurements have provided an invaluable technique with which to measure the properties of astrophysical magnetized plasmas. Unfortunately, typical observations provide information only about the density-weighted average of…

Astrophysics of Galaxies · Physics 2014-11-20 Avery E. Broderick , Roger D. Blandford

Faraday tomography is thought to be a powerful tool to explore cosmic magnetic field. Broadband radio polarimetric data is essential to ensure the quality of Faraday tomography, but such data is not easy to obtain because of radio frequency…

Instrumentation and Methods for Astrophysics · Physics 2018-12-05 Takuya Akahori , Shinsuke Ideguchi , Takahiro Aoki , Kazuhiro Takefuji , Hideki Ujihara , Keitaro Takahashi
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