Rotation measure variation across M84

Details Rotation measure variation across M84 Rotation measure variation across M84

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.228..557l&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 228, Oct. 1, 1987, p. 557-571.

Astronomy and Astrophysics

Astronomy

70

Astrometry, Galactic Rotation, Radio Galaxies, Astronomical Maps, Faraday Effect, Gray Scale, Linear Polarization, Magnetic Fields

Scientific paper

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.

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