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Radio Properties of the Nuclei in Elliptical, SO and Spiral Galaxies

Published online by Cambridge University Press:  14 August 2015

R.D. Ekers
R.D. Ekers*
Affiliation:
Kapteyn Astronomical Institute, University of Groningen

Extract

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When Heeschen (1968) found that the nuclear sources in the two elliptical galaxies NGC 4278 and NGC 1052 contained flat spectrum unresolved sources he conjectured that these might be weaker versions of the compact optically thick and strongly variable sources found in the quasar nuclei. This conjecture appears to be correct since these are both now known to have diameters <0.1 pc (Cohen et al. 1971) and to be variable on time scales of order one year. This variability has recently been confirmed by observations with the VLA (Heeschen, private communication).

Type
IV: Nearby Active Galaxies and Their Nuclei
Information
Symposium - International Astronomical Union , Volume 77: Structure and Properties of Nearby Galaxies , 1978 , pp. 221 - 225
Copyright
Copyright © Reidel 1978 

References

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