Distribution of polarised radio emission in M31

Details Distribution of polarised radio emission in M31 Distribution of polarised radio emission in M31

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980natur.283..272b&link_type=abstract

Nature, vol. 283, Jan. 17, 1980, p. 272-275.

Astronomy and Astrophysics

Astronomy

39

Andromeda Galaxy, Brightness Temperature, Galactic Radio Waves, Interstellar Magnetic Fields, Polarized Electromagnetic Radiation, Radio Astronomy, Spiral Galaxies, Astronomical Maps, Polarization Characteristics, Radio Sources (Astronomy)

Scientific paper

Observations of the polarization of the bright ring of radio emission in M 31 at 11 cm are reported. The observations were carried out with a 100-m telescope using a dual-channel correlation polarimeter in the secondary focus operated at 2700 MHz, and a total power map was used to compute the degrees of polarization. The distribution of polarized intensity is presented in detail. Variations of polarized brightness temperature in the emission ring and the orientation of the polarization vectors are interpreted to indicate that the magnetic field of the galaxy is preferentially aligned along the spiral arms that form the ring of polarized emission around the galactic center.

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