Structure of the compact nuclear radio source in M82

Details Structure of the compact nuclear radio source in M82 Structure of the compact nuclear radio source in M82

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...241..561b&link_type=abstract

Astrophysical Journal, Part 1, vol. 241, Oct. 15, 1980, p. 561-566.

Astronomy and Astrophysics

Astronomy

4

Galactic Nuclei, Radio Sources (Astronomy), Brightness, Compton Effect, Microwaves, Radio Spectra, Synchrotron Radiation

Scientific paper

To provide the synchrotron microwave radiation that is observed from the bright radio source 41.9 + 58 in M82 with a Gaussian source model having the size given by the VLBI observations (28 light-days) requires an extremely high number density of relativistic electrons (about 20 million per cu cm). Since the Compton scattering optical depth is of the order of unity in such a model, 41.9 + 58 should be an exceptionally bright X-ray and gamma-ray source, but this conclusion is not borne out by the observations. Thus, it is concluded that the radio brightness distribution is not well represented by a simple Gaussian source, but that a more complicated geometry, a disk or disk-like radio structure, is required.

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