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Optical and UV Spectral Diagnostics for GPS and CSS Sources

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Date

2003

Authors

Dopita, Michael

Journal Title

Journal ISSN

Volume Title

Publisher

CSIRO Publishing

Abstract

In this paper I examine the use of optical and UV spectral diagnostic ratios to distinguish between gas which is locally shock-excited by the interaction with a jet and that which is photoionised by the central engine. In many cases key UV lines remain unobserved except in the case of high redshift radio galaxies. However, in one case, the nearby GPS galaxy NGC1052, UV data was obtained with the FOS. This object shows LINER characteristics at optical wavelengths, but has a rich coronal-line spectrum in the UV. We conclude that jet-driven shocks tend to evolve from shock-excited to photoionised later in their evolution.

Description

Keywords

Keywords: Galaxies: radio sources; ISM: shocks,photoionisation

Citation

URI

http://hdl.handle.net/1885/87153

Collections

ANU Research Publications

Source

The Third Workshop on Compact Steep Spectrum and GHz-Peaked Spectrum Radio Sources

Type

Conference paper

Book Title

Entity type

Access Statement

License Rights

DOI

10.1071/AS02026

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