Rotation measure variation across M84
Open Access
- 1 October 1987
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 228 (3) , 557-571
- https://doi.org/10.1093/mnras/228.3.557
Abstract
VLA images of the linearly polarized emission from the weak radio galaxy M84 (3C 272.1) with 3.9 arcsec resolution at 1.4 and 4.9 GHz show an organized pattern of Faraday rotation measure across the radio source. This pattern implies that there is a magnetoionic medium ∼10 kpc in extent within M84, in front of, but not mixed with, the radio-emitting plasma. There must be a large-scale reversal in the magnetic field in this medium across the face of the radio source. The medium may be responsible for the more diffuse component of the X-ray emission from M84, and there is evidence that it is interacting with the outflow in the two radio jets.Keywords
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