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Superluminal Behaviour of the Double-Lobed Radio Galaxy 3C111

Published online by Cambridge University Press:  03 August 2017

Eugen Preuss ,
Walter Alef  and
Kenneth I. Kellermann
Eugen Preuss
Affiliation:
MPI für Radioastronomie, Auf dem Hügel 69, 5300 Bonn 1, FRG
Walter Alef
Affiliation:
MPI für Radioastronomie, Auf dem Hügel 69, 5300 Bonn 1, FRG
Kenneth I. Kellermann
Affiliation:
NRAO, Edgemont Road, Charlottesville, Va. 22903, USA

Extract

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Due to sensitivity problems only about a dozen of the powerful double-lobed radio galaxies have so far been mapped with VLBI. Even less is known about the time dependence of the small scale structure in these objects (Preuss and Alef, 1987). We have recently reported the first results of our monitoring program of classical double sources. We observed strong changes of the pc-scale structure in 3C111 (Götz et al., 1987) and 3C390.3 (Alef et al., 1987) implying “superluminal behaviour” in both sources. This is the first time that such a phenomenon has been found in lobe-dominated radio galaxies. Both objects are Broad Line Radio Galaxies of type N, and their radio emission from m to cm wavelengths is dominated by their outer lobes which are ∼300 kpc apart (H0 = 50 km/s/Mpc).

Type
Extragalactic
Information
Symposium - International Astronomical Union , Volume 129: The Impact of VLBI on Astrophysics and Geophysics , 1988 , pp. 105 - 106
Copyright
Copyright © Reidel 1988 

References

Alef, W., Götz, M.M.A., Preuss, E., Kellermann, K.I.: 1987, submitted to Astron. Astrophys. Google Scholar
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Linfield, R.: 1987, Astrophys. J., June Google Scholar
Preuss, E., Alef, W.: 1987, Proc. IAU Symp. No. 124, (eds) Hewitt, et al., Reidel, Dordrecht.Google Scholar