Radio observations of active and normal nuclei

Details Radio observations of active and normal nuclei Radio observations of active and normal nuclei

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phys...17..171e&link_type=abstract

(Niels Bohr Institut, Teknisk Videnskabelige Forskningsrad, and Nordisk Institut for Teoretisk Atomfysik, Symposium on Quasars a

Astronomy and Astrophysics

Astronomy

14

Galactic Nuclei, Quasars, Radio Galaxies, Radio Observation, Spiral Galaxies, Elliptical Galaxies, Nonthermal Radiation, Radio Astronomy, Radio Emission, Self Absorption, Seyfert Galaxies

Scientific paper

At the centre of our galaxy and in most other spiral galaxies there is a region of enhanced non-thermal radio emission of a few hundred parsecs in extent. The Seyfert galaxies have similar but somewhat more intense radio emission. Elliptical galaxies, radio galaxies and quasars have smaller and variable nuclear radio sources with complex spectral characteristics attributed to self-absorption effects. Using the clear differences between the nuclei of spiral and Seyfert galaxies on the one hand and elliptical and radio galaxies on the other, it can be argued that the quasars are extremely active manifestations of the elliptical and radio galaxies rather than of the Seyfert galaxies.

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