Acceleration of cosmic-ray electrons by large-scale galactic spiral shocks — An observational report |
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| Authors: | M Urbanik R Beck U Klein R Gräve |
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| Institution: | (1) Astronomical Observatory, Jagiellonian University, Krakow, Poland;(2) Max-Planck-Institut für Radioastronomie, Bonn, F.R.G.;(3) Radioastronomisches Institut der Universität Bonn, F.R.G.;(4) Present address: DFVLR, Köln, F.R.G. |
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| Abstract: | The hypothesis that large-scale shocks accompanying spiral density waves are the main sources of cosmic-ray electrons for whole galactic disks has been tested utilizing results of 10.7 GHz observations of spiral galaxies. It is suggested that the 10.7 GHz emission of galactic disks is largely controlled by star-forming processes, and that large-scale shocks apparently play a minor role. |
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