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Near-infrared Imaging and Spectroscopy of Centaurus A

Published online by Cambridge University Press:  25 April 2016

Vikki Meadows  and
David Allen
Vikki Meadows
Affiliation:
university of Sydneyand Anglo-Australian Observatory, Anglo-Australian Observatory PO Box 296 Epping, NSW 2121
David Allen
Affiliation:
university of Sydneyand Anglo-Australian Observatory, Anglo-Australian Observatory PO Box 296 Epping, NSW 2121
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Abstract

We present near-infrared images and spectra of the peculiar radio galaxy Centaurus A. The images reveal extended emission regions at the longer wavelengths and show colours characteristic of reddened starlight. We believe we are seeing stars within the warped disc of Cen A, which are obscured in the optical by dust. Both images and spectra indicate the presence of a compact core, whose colours are much redder than those of the surrounding stars. In the spectrum of the core, detections have been made of [Fe II] 1.644 μm, H2 2.122 μm and Br γ. These lines appear to peak on the nucleus and their presence and width suggest starburst activity.

Type
Extragalactic
Information
Publications of the Astronomical Society of Australia , Volume 10 , Issue 2 , 1992 , pp. 104 - 106
Copyright
Copyright © Astronomical Society of Australia 1992

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