The Power of Low Frequencies: Faraday Tomography in the sub-GHz regime

Faraday tomography, the study of the distribution of extended polarized emission by strength of Faraday rotation, is a powerful tool for studying magnetic fields in the interstellar medium of our Galaxy and nearby galaxies. The strong frequency dependence of Faraday rotation results in very differen...

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Bibliographic Details
Published inarXiv.org
Main Author Van Eck, Cameron L
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 23.10.2018
Subjects
Dependence
Emission analysis
Faraday effect
Galactic rotation
Galaxies
Interstellar matter
Low frequencies
Milky Way Galaxy
Tomography
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Summary:Faraday tomography, the study of the distribution of extended polarized emission by strength of Faraday rotation, is a powerful tool for studying magnetic fields in the interstellar medium of our Galaxy and nearby galaxies. The strong frequency dependence of Faraday rotation results in very different observational strengths and limitations for different frequency regimes. I discuss the role these effects take in Faraday tomography below 1 GHz, emphasizing the 100-200 MHz band observed by the Low Frequency Array and the Murchison Widefield Array. With that theoretical context, I review recent Faraday tomography results in this frequency regime, and discuss expectations for future observations.
ISSN:2331-8422