The explosion origin of the radio halo in NGC891

Details The explosion origin of the radio halo in NGC891 The explosion origin of the radio halo in NGC891

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...193...22y&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 193, no. 1-2, March 1988, p. 22-26. Research supported by the Science Educatio

Astronomy and Astrophysics

Astrophysics

1

Electron Sources, Halos, Radio Galaxies, Relativistic Particles, Astronomical Models, Radiant Flux Density, Spiral Galaxies

Scientific paper

New observations of NGC 891 seem to raise some problems for the diffusion model for the propagation of cosmic-ray electrons. The explosion model the authors suggest may be more reasonable. There are only two main physical assumptions: (1) Two families of relativistic electrons, the halo and the disk electrons. The halo electrons were produced in an explosion of the galactic nucleus in the distant past (≡1.1×107yr). (2) An equipartition assumption: B2 ∝ ρ*, where ρ* is the number density of stars in the halo and B is the interstellar magnetic field. By use of these assumptions, the main observed results can be explained self-consistently.

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