Linearly polarized radioemission from the anomalous arms in NGC 4258 (M106)

Details Linearly polarized radioemission from the anomalous arms in NGC 4258 (M106) Linearly polarized radioemission from the anomalous arms in NGC 4258 (M106)

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...211..266h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 211, no. 2, March 1989, p. 266-274.

Astronomy and Astrophysics

Astrophysics

48

Interstellar Magnetic Fields, Linear Polarization, Radio Emission, Spiral Galaxies, Astronomical Maps, Continuous Radiation, Very Large Array (Vla)

Scientific paper

Radio continuum measurements with the Very Large Array of the total power and linearly polarized emission from NGC 4258 are presented. They show that, within the anomalous arms, the leading ridges have the flattest radio spectrum with alpha = -0.6. This suggests that they are the youngest features of the radio anomaly. The radio continuum emission is highly polarized and the derived magnetic field configuration is bisymmetric with the field lines closely following the ridges of the total emission. The polarization measurements give a strong argument in favor of the anomalous arms being in the plane of the galaxy.

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