Optical properties of low /z radio galaxies

Details Optical properties of low /z radio galaxies Optical properties of low /z radio galaxies

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002newar..46..353s&link_type=abstract

New Astronomy Reviews, Volume 46, Issue 2-7, p. 353-356.

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The optical morphological and photometric properties of 79 low redshift radio galaxies are discussed. It is found that most radio galaxies are luminous bulge dominated systems similar to normal non-radio giant ellipticals. The average absolute magnitude of the sample is =-23.98, with a clear trend for FR I sources to be /~0.5 mag brighter than FR II galaxies. In about 40% of the objects we find an excess of light in the nucleus attributable to the presence of a nuclear point source. This contributes on average for ~1-2% of the total flux from the host galaxy. Radio galaxies follow the same μe-Re relationship of normal (non-active) elliptical galaxies. The distribution of ellipticity, the amount of twisting and shape of isophotes do not differ significantly from other ellipticals. These results support a scenario where radio emission is little related with the overall properties of the host galaxy.

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