Proceedings of the International Astronomical Union
Symposium - International Astronomical Union
Volume 77: structure and properties of nearby galaxies
Radio Continuum Observations of...
Symposium - International Astronomical Union, Volume 77 (Structure and Properties of Nearby Galaxies)
This volume was published under a former title. See this journal's title history.
Radio Continuum Observations of M31 and M33
Elly M. Berkhuijsen (a1)
Max-Planck-Institut für Radioastronomie, Bonn, F.R.G.
Published online by Cambridge University Press: 14 August 2015
The two nearest spiral galaxies, M31 and M33, have been extensively studied both at optical as well as at radio wavelengths. Reviews of radio continuum observations are given in van der Kruit and Allen (1976) and in von Kap-herr et al. (1978), respectively. In Table 1 new radio observations in various stages of progress are listed, all of which show — or are expected to show — spiral structure. In this paper the Effelsberg maps at 11 cm of M31 and at 6 cm of M33 are discussed and compared with optical data. Some attention is given to the separation of thermal and nonthermal emission which is essential to any discussion of the origin of the radiation.
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