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The Large-Scale Distribution of Synchrotron Emissivity in the Galaxy

Published online by Cambridge University Press:  14 August 2015

S. Kearsey ,
J. L. Osborne ,
S. Phillipps ,
C.G.T. Haslam ,
C. J. Salter  and
H. Stoffel
S. Kearsey
Affiliation:
Department of Physics, Durham University, U.K.
J. L. Osborne
Affiliation:
Department of Physics, Durham University, U.K.
S. Phillipps
Affiliation:
Department of Physics, Durham University, U.K.
C.G.T. Haslam
Affiliation:
Max-Planck-Institute for Radioastronomy, Bonn, F.R.G.
C. J. Salter
Affiliation:
Max-Planck-Institute for Radioastronomy, Bonn, F.R.G.
H. Stoffel
Affiliation:
Max-Planck-Institute for Radioastronomy, Bonn, F.R.G.

Extract

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The all-sky radio continuum map at 408 MHz presented at this symposium by Haslam et al. can be interpreted in terms of the large-scale 3-dimensional distribution of synchrotron emissivity in the Galaxy when due allowance is made for the thermal emission. Its derivation from a 2-dimensional map must involve a number of assumptions so it is instructive to compare the results of alternative approaches (described in detail in forthcoming papers by the present authors). In both cases the variation of emissivity in the galactic plane is obtained from the observed intensity profile at b=0o and then the z-variation is chosen to give the best fit to the complete map. The observed profile is shown in the figure with and without the contributions of catalogued supernova remnants and HII regions.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 94: Origin of Cosmic Rays , 1981 , pp. 223 - 224
Copyright
Copyright © Reidel 1981 

References

Brindle, C., French, D.K., and Osborne, J.L.: 1978 MNRAS 184, 283.Google Scholar
Georgelin, Y.M., and Georgelin, Y.P.: 1976 Astr. Astrophys. 49, 57.Google Scholar
Kanbach, G., and Beuermann, K.: 1979 Proc. 16th Int. Cosmic Ray Conf. 1, 75.Google Scholar