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Symmetric Parsec-Scale Radio Jets in NGC 4261

Published online by Cambridge University Press:  12 April 2016

Dayton L. Jones
Affiliation:
Jet Propulsion Laboratory, Caltech, Pasadena, CA, USA
Ann E. Wehrle
Affiliation:
Infrared Processing and Analysis Center, JPL, Caltech, Pasadena, CA, USA

Abstract

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VLBA observations of NGC 4261 (3C 270) reveal highly symmetric radio structures at both 1.6 and 8.4 GHz. There is little evidence for free-free absorption in the inner few pc, despite the fact that HST imaging shows this galaxy to contain a nearly edge-on disk of gas and dust in its nucleus. However, at our highest resolution we find a narrow gap in emission just east of the radio core which we interpret as evidence for a small (sub-parsec) nearly edge-on accretion disk which is obscuring the base of the counterjet. The position angle of the pc-scale radio axis agrees with the position angle of the VLA-scale jets, which differs from the apparent rotation axis of the nuclear disk seen by HST.

Type
Research Article
Copyright
Copyright © Astronomical Society of the Pacific 1998

References

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