Faraday Rotation of Extended Emission as a Probe of the Large-Scale Galactic Magnetic Field
AbstractThe Galactic magnetic field is an integral constituent of the interstellar medium (ISM), and knowledge of its structure is crucial to understanding Galactic dynamics. The Rotation Measures (RM) of extragalactic (EG) sources have been the basis of comprehensive Galactic magnetic field models. Polarised extended emission (XE) is also seen along lines of sight through the Galactic disk, and also displays the effects of Faraday rotation. Our aim is to investigate and understand the relationship between EG and XE RMs near the Galactic plane, and to determine how the XE RMs, a hitherto unused resource, can be used as a probe of the large-scale Galactic magnetic field. We used polarisation data from the Canadian Galactic Plane Survey (CGPS), observed near 1420 MHz with the Dominion Radio Astrophysical Observatory (DRAO) Synthesis Telescope. We calculated RMs from a linear fit to the polarisation angles as a function of wavelength squared in four frequency channels, for both the EG sources and the XE. Across the CGPS area,
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Ordog, A.; Booth, R.A.; Van Eck, C.L.; Brown, J.-A.C.; Landecker, T.L. Faraday Rotation of Extended Emission as a Probe of the Large-Scale Galactic Magnetic Field. Galaxies 2019, 7, 43.
Ordog A, Booth RA, Van Eck CL, Brown J-AC, Landecker TL. Faraday Rotation of Extended Emission as a Probe of the Large-Scale Galactic Magnetic Field. Galaxies. 2019; 7(2):43.Chicago/Turabian Style
Ordog, Anna; Booth, Rebecca A.; Van Eck, Cameron L.; Brown, Jo-Anne C.; Landecker, Thomas L. 2019. "Faraday Rotation of Extended Emission as a Probe of the Large-Scale Galactic Magnetic Field." Galaxies 7, no. 2: 43.
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