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Ghost of a shell: magnetic fields of Galactic supershell GSH 006 − 15 + 7

Thomson, Alec; McClure-Griffiths, Naomi; Federrath, Christoph; Dickey, John; Carretti, Ettore; Gaensler, B. M.; Haverkorn, M.; Kesteven, M. J.; Staveley-Smith, Lister


We identify a counterpart to a Galactic supershell in diffuse radio polarization, and use this to determine the magnetic fields associated with this object. GSH 006 − 15 + 7 has perturbed the polarized emission at 2.3 GHz, as observed in the S-band Polarization All Sky Survey (S-PASS), acting as a Faraday screen. We model the Faraday rotation over the shell, and produce a map of Faraday depth over the area across it. Such models require information about the polarized emission behind the...[Show more]

CollectionsANU Research Publications
Date published: 2018-07-19
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1093/mnras/sty1865
Access Rights: Open Access


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