The reddened quasar 3C 22 and its implications

Rawlings, Steve, Lacy, Mark, Sivia, D. S. and Eales, Stephen Anthony ORCID: https://orcid.org/0000-0002-7394-426X 1995. The reddened quasar 3C 22 and its implications. Monthly Notices of the Royal Astronomical Society 274 (2) , pp. 428-434.

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Abstract

We prove the presence of a broad (apx-}5000 km s^-1) Hα emission line in the spectrum of the z=0.935 `radio galaxy' 3C 22. This confirms suspicions that some of the faint red objects classified as high-redshift radio galaxies are actually slightly reddened quasars. Using our WHT and UKIRT spectra, we estimate a rest-frame extinction towards the quasar of A_V~2. We review the difficulties involved in detecting broad emission lines in high-redshift radio galaxies, concluding that, if one wishes to discover the origin of the observed near-infrared light, then near-infrared spectroscopy is a very limited technique. We argue that a programme of thermal imaging is likely to prove far more fruitful.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Publisher:	Wiley-Blackwell
ISSN:	0035-8711
Related URLs:	http://adsabs.harvard.edu/full/1995MNRAS...
Last Modified:	24 Oct 2022 11:38
URI:	https://orca.cardiff.ac.uk/id/eprint/48835

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