Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.170..215g&link_type=abstract
(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640
Astronomy and Astrophysics
Astronomy
1
Cosmic Dust, Extragalactic Radio Sources, Galactic Nuclei, Radio Galaxies, Radio Observation, Black Holes (Astronomy), Morphology, Radio Emission
Scientific paper
Radio and optical images of early-type galaxies with dust lanes have been analyzed in order to investigate the characteristics of radio emission and to compare it with their properties at other frequencies. The radio structures are small and weak. The preliminary results show that in a minority of cases radio emission originates in the associated galactic nuclei, where a massive black hole is harbored. On the contrary, in the less powerful radio galaxies, sources originating from stellar phenomena may play an important role. The galaxies are classified with respect to the dust lane morphology, comparing it with the radio emission. The lack of radio sources in early-type galaxies with dust lanes along the galaxy minor axis seems to suggest that the accretion of material does not reach the conditions necessary to trigger nuclear activity.
Gregorini Loretta
Messina Andrea
Vettolani Giampaolo
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