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Radio continuum emission of the Milky Way and nearby galaxies

Published online by Cambridge University Press:  04 August 2017

Rainer Beck  and
Wolfgang Reich
Rainer Beck
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, FRG
Wolfgang Reich
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, FRG

Abstract

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The radio continuum emission of the Milky Way and nearby galaxies can be decomposed into a central region, a clumpy “thin disk”, concentrated in the spiral arms, and a smooth “thick disk” (or flattened “halo”). The emissivity ratio of the two disks seems to be related to the magnetic field properties: Galaxies with strong radio spiral arms reveal a highly ordered field following the arm direction, while galaxies with diffuse disks contain a less ordered, smoothly distributed field. The degree of uniformity of the field seems to correlate with the total optical luminosity. The average magnetic field in the Milky Way is weak and turbulent compared to most of the nearby galaxies observed so far.

Type
PART II: COMPOSITION, STRUCTURE AND KINEMATICS
Information
Symposium - International Astronomical Union , Volume 106: The Milky Way Galaxy , 1985 , pp. 239 - 244
Copyright
Copyright © Reidel 1985 

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