G5.4-1.2 (Milne 56) - A galactic supernova remnant with a high rotation measure

Details G5.4-1.2 (Milne 56) - A galactic supernova remnant with a high rotation measure G5.4-1.2 (Milne 56) - A galactic supernova remnant with a high rotation measure

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.255..707m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 255, April 15, 1992, p. 707-712.

Astronomy and Astrophysics

Astronomy

6

Faraday Effect, Milky Way Galaxy, Radio Sources (Astronomy), Supernova Remnants, Astronomical Polarimetry, H Ii Regions, Polarized Radiation, Radio Astronomy

Scientific paper

Total intensity and polarization observations at 4.6, 4.75, 4.9 and 8.4 GHz are presented. Results of these observations support the hypothesis that G5.4-1.2 (Milne 56) is a shell SNR with a high degree of polarization, a well-defined magnetic field, rather high values of Faraday rotation measure, and a very flat spectral index (-0.16). While the SNR may not be of 'a new class of nonthermal radio source' (Becker and Helfand, 1985), it is considered to be an unusual SNR. One of the most unusual features of G5.4-1.2 is the discontinuity in the extremely high rotation measure inside the shell.

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