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New constraints on the galactic halo magnetic field using rotation measures of extragalactic sources toward the outer galaxy

Mao, S.A.; McClure-Griffiths, Naomi; Gaensler, B M; Brown, J.C.; Van Eck, C.L.; Haverkorn, M.; Kronberg, Phillip P; Stil, J.; Shukurov, A.; Taylor, A. Russ

Description

We present a study of the Milky Way disk and halo magnetic field, determined from observations of Faraday rotation measure (RM) towards 641 polarized extragalactic radio sources in the Galactic longitude range 100◦-117◦, within 30◦ of the Galactic plane. For |b| < 15◦, we observe a symmetric RM distribution about the Galactic plane. This is consistent with a disk field in the Perseus arm of even parity across the Galactic midplane. In the range 15◦<|b| < 30◦, we find median rotation measures...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/152146
Source: The Astrophysical Journal
DOI: 10.1088/0004-637X/755/1/21
Access Rights: Open Access

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