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dc.contributor.authorPinfield, D.J.
dc.contributor.authorGomes, J.
dc.contributor.authorDay-Jones, A. C.
dc.contributor.authorLeggett, S.K.
dc.contributor.authorGromadzki, M.
dc.contributor.authorBurningham, B.
dc.contributor.authorRuiz, M. T.
dc.contributor.authorKurtev, R.
dc.contributor.authorCattermole, T.
dc.contributor.authorCardoso, C.
dc.contributor.authorLodieu, N.
dc.contributor.authorFaherty, J.
dc.contributor.authorLittlefair, S.
dc.contributor.authorSmart, R.
dc.contributor.authorIrwin, M.
dc.contributor.authorClarke, J. R. A.
dc.contributor.authorSmith, Leigh
dc.contributor.authorLucas, P.W.
dc.contributor.authorGalvez-Ortiz, M. C.
dc.contributor.authorJenkins, J. S.
dc.contributor.authorJones, H.R.A.
dc.contributor.authorRebolo, R.
dc.contributor.authorBejar, V. J. S.
dc.contributor.authorGauza, B.
dc.date.accessioned2014-07-01T09:01:37Z
dc.date.available2014-07-01T09:01:37Z
dc.date.issued2014-01-11
dc.identifier.citationPinfield , D J , Gomes , J , Day-Jones , A C , Leggett , S K , Gromadzki , M , Burningham , B , Ruiz , M T , Kurtev , R , Cattermole , T , Cardoso , C , Lodieu , N , Faherty , J , Littlefair , S , Smart , R , Irwin , M , Clarke , J R A , Smith , L , Lucas , P W , Galvez-Ortiz , M C , Jenkins , J S , Jones , H R A , Rebolo , R , Bejar , V J S & Gauza , B 2014 , ' A deep WISE search for very late type objects and the discovery of two halo/thick-disc T dwarfs : WISE 0013+0634 and WISE 0833+0052 ' , Monthly Notices of the Royal Astronomical Society , vol. 437 , no. 2 , pp. 1009-1026 . https://doi.org/10.1093/mnras/stt1437
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 7180662
dc.identifier.otherPURE UUID: 8cd19162-f0d4-4579-a59c-c0513e6d2626
dc.identifier.otherWOS: 000331617000001
dc.identifier.otherScopus: 84890899285
dc.identifier.urihttp://hdl.handle.net/2299/13878
dc.descriptionThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved
dc.description.abstractA method is defined for identifying late-T and Y dwarfs in WISE down to low values of signal-to-noise. This requires a WISE detection only in the W2-band and uses the statistical properties of the WISE multiframe measurements and profile fit photometry to reject contamination resulting from non-point-like objects, variables and moving sources. To trace our desired parameter space, we use a control sample of isolated non-moving non-variable point sources from the Sloan Digital Sky Survey (SDSS), and identify a sample of 158 WISE W2-only candidates down to a signal-to-noise limit of eight. For signal-to-noise ranges >10 and 8-10, respectively, similar to 45 and similar to 90 per cent of our sample fall outside the selection criteria published by the WISE team, mainly due to the type of constraints placed on the number of individual W2 detections. We present follow-up of eight candidates and identify WISE 0013+0634 and WISE 0833+0052, T8 and T9 dwarfs with high proper motion (similar to 1.3 and similar to 1.8 arcsec yr(-1)). Both objects show a mid-infrared/near-infrared excess of similar to 1-1.5 mag and are K band suppressed. Distance estimates lead to space motion constraints that suggest halo (or at least thick disc) kinematics. We then assess the reduced proper motion diagram of WISE ultracool dwarfs, which suggests that late-T and Y dwarfs may have a higher thick-disc/halo population fraction than earlier objects.en
dc.format.extent18
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rights/dk/atira/pure/core/openaccesspermission/open
dc.subjectsurveys
dc.subjectbrown dwarfs
dc.subjectstars: low-mass
dc.subjectCOOL BROWN DWARF
dc.subjectINFRARED-SURVEY-EXPLORER
dc.subjectDIGITAL SKY SURVEY
dc.subjectEXTRASOLAR GIANT PLANETS
dc.subjectINITIAL MASS FUNCTION
dc.subjectLARGE-AREA SURVEY
dc.subjectBINARY-SYSTEM
dc.subjectSPACE DENSITY
dc.subjectSPECTRAL CLASSIFICATION
dc.subjectLUMINOSITY-FUNCTION
dc.titleA deep WISE search for very late type objects and the discovery of two halo/thick-disc T dwarfs : WISE 0013+0634 and WISE 0833+0052en
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionScience & Technology Research Institute
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2013-08-01
rioxxterms.versionSMUR
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/stt1437
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeopenAccess


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