Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....90..140m&link_type=abstract
Astronomy and Astrophysics, vol. 90, no. 1-2, Oct. 1980, p. 140-145.
Astronomy and Astrophysics
Astrophysics
1
Cosmic Rays, Electron Diffusion, Electron Distribution, Electron Sources, Milky Way Galaxy, Astronomical Models, Diffusion Coefficient, Electron Density (Concentration), Galactic Structure, Gauss Equation, Interstellar Magnetic Fields, Magnetic Flux, Supernovae, Transfer Functions
Scientific paper
A diffusion-loss transfer equation for the cosmic-ray electron component is solved for Gaussian and exponential distributions of sources within the Galaxy. Spectral shapes and electron densities at various distances from the Galactic center are given. An interpretation of the steepening at approximately 40 GeV, suggested by several observations, allows an estimate of the scale length of the source distribution and the diffusion coefficient. The former is equal to approximately 4 kpc in the Gaussian case, and approximately 1 kpc in the exponential one; the latter should be (1-2) x 10 to the 30th sq cm/sec, corresponding to a mean free path of 30-60 pc, comparable with the typical scale length of the interstellar magnetic-field irregularities. The source concentration in the central region of the Galaxy may be an indication that supernovae, whose spatial distribution seems to be that of a rather smooth exponential disk, cannot have a primary role as cosmic-ray electron sources.
Manzo Giuseppe
Massaro Enrico
Sacco Bruno
No associations
LandOfFree
The source distribution of cosmic-ray electrons does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The source distribution of cosmic-ray electrons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The source distribution of cosmic-ray electrons will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-946822