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The Large-Scale Distribution of Synchrotron Emissivity in the Galaxy

  • S. Kearsey
  • J. L. Osborne
  • S. Phillipps
  • C. G. T. Haslam
  • C. J. Salter
  • H. Stoffel
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 94)

Abstract

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.

Keywords

Spectral Index Radio Emission Thermal Emission Spiral Galaxy Synchrotron Emissivity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

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

Copyright information

© IAU 1981

Authors and Affiliations

  • S. Kearsey
    • 1
  • J. L. Osborne
    • 1
  • S. Phillipps
    • 1
  • C. G. T. Haslam
    • 2
  • C. J. Salter
    • 2
  • H. Stoffel
    • 2
  1. 1.Department of PhysicsDurham UniversityUK
  2. 2.Max-Planck-Institute for RadioastronomyBonnGermany

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