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Using a Complete Spectroscopic Survey to Find Red Quasars and Test the KX Method

Jurek, Russell; Drinkwater, Michael John; Francis, Paul; Pimbblet, Kevin

Description

We present an investigation of quasar colour-redshift parameter space in order to search for radio-quiet red quasars and to test the ability of a variant of the KX quasar selection method to detect quasars over a full range of colour without bias. This is achieved by combining InfraRed Imager and Spectrograph 2 imaging with the complete Fornax Cluster Spectroscopic Survey to probe parameter space unavailable to other surveys. We construct a new sample of 69 quasars with measured bJ - K colours....[Show more]

dc.contributor.authorJurek, Russell
dc.contributor.authorDrinkwater, Michael John
dc.contributor.authorFrancis, Paul
dc.contributor.authorPimbblet, Kevin
dc.date.accessioned2015-12-07T22:14:40Z
dc.identifier.issn0035-8711
dc.identifier.urihttp://hdl.handle.net/1885/17536
dc.description.abstractWe present an investigation of quasar colour-redshift parameter space in order to search for radio-quiet red quasars and to test the ability of a variant of the KX quasar selection method to detect quasars over a full range of colour without bias. This is achieved by combining InfraRed Imager and Spectrograph 2 imaging with the complete Fornax Cluster Spectroscopic Survey to probe parameter space unavailable to other surveys. We construct a new sample of 69 quasars with measured bJ - K colours. We show that the colour distribution of these quasars is significantly different from that of the Large Bright Quasar Survey's quasars at a 99.9 per cent confidence level. We find 11 of our sample of 69 quasars have significantly red colours (bJ - K ≥ 3.5) and from this, we estimate the red quasar fraction of the K ≤ 18.4 quasar population to be 31 per cent, and robustly constrain it to be at least 22 per cent. We show that the KX method variant used here is more effective than the UVX selection method, and has less colour bias than optical colour-colour selection methods.
dc.publisherBlackwell Publishing Ltd
dc.sourceMonthly Notices of the Royal Astronomical Society
dc.subjectKeywords: Galaxies: active; Infrared: galaxies; Quasars: general; Techniques: photometric; X-rays: diffuse background
dc.titleUsing a Complete Spectroscopic Survey to Find Red Quasars and Test the KX Method
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume383
dc.date.issued2008
local.identifier.absfor020103 - Cosmology and Extragalactic Astronomy
local.identifier.ariespublicationu9710753xPUB1
local.type.statusPublished Version
local.contributor.affiliationJurek, Russell, University of Queensland
local.contributor.affiliationDrinkwater, Michael John, University of Queensland
local.contributor.affiliationFrancis, Paul, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationPimbblet, Kevin, University of Queensland
local.description.embargo2037-12-31
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage673
local.bibliographicCitation.lastpage682
local.identifier.doi10.1111/j.1365-2966.2007.12567.x
dc.date.updated2015-12-07T07:33:01Z
local.identifier.scopusID2-s2.0-37848998539
local.identifier.thomsonID000252122000022
CollectionsANU Research Publications

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