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Evidence for a large undetected population of dust-reddened quasars

Webster, Rachel L.; Francis, Paul; Petersont, Bruce A.; Drinkwater, Michael J.; Masci, Frank J.

Description

QUASARS have been detected at many wavelengths, but often ones that are bright at one wavelength are very faint or undetectable at other wavelengths. It has therefore been impossible to design a single search technique that would identify all quasars, raising the question of how many may have gone unidentified. Here we show that quasars selected from a radio catalogue have a wide range of optical colours, which we interpret as arising from varying amounts of dust along the line of sight. Most...[Show more]

CollectionsANU Research Publications
Date published: 1995
Type: Journal article
URI: http://hdl.handle.net/1885/147259
Source: Nature
DOI: 10.1038/375469a0

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