Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5545
Title: Possible relationship between the radio and optical structures associated with the active galaxy Centaurus A
Authors: Gopal-Krishna
Saripalli, Lakshmi
Issue Date: Dec-1984
Publisher: EDP Sciences
Citation: Astronomy and Astrophysics, 1984, Vol.141, p61
Abstract: A detailed comparison of the recent deep optical and radio photographs of the nearby radio galaxy Centaurus A (NGC 5128) is presented. This has provided evidence for dynamical interaction between the relativistic plasma and optically detected shell-type structures. Based on this, a new interpretation is suggested for the formation of multiple radio peaks observed in the two giant radio lobes of this active galaxy and also for their inversion symmetric morphology. Also proposed is a method for estimating magnetic field strength inside the radio lobes, based on dynamical considerations of the optical structures interacting with the radio components. The field, thus estimated for the northern inner radio lobe of Cen A, is nearly three times weaker than the value derived under the usual equipartition assumption. The marked bending of the Cen A jet towards this inner radio lobe could be interpreted in terms of what appears to be an encounter with a shell, provided the jet is light and moves with a bulk relativistic speed.
Description: Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI: http://hdl.handle.net/2289/5545
ISSN: 0004-6361
1432-0746(Online)
Alternative Location: http://adsabs.harvard.edu/abs/1984A%26A...141...61G
Copyright: 1984 EDP Sciences
Appears in Collections:Research Papers (A&A)

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