dc.contributor.author | Lodieu, N. | |
dc.contributor.author | Pinfield, D.J. | |
dc.contributor.author | Leggett, S.K. | |
dc.contributor.author | Jameson, R.F. | |
dc.contributor.author | Mortlock, D.J. | |
dc.contributor.author | Warren, S.J. | |
dc.contributor.author | Burningham, B. | |
dc.contributor.author | Lucas, P.W. | |
dc.contributor.author | Chiu, K. | |
dc.contributor.author | Liu, M.C. | |
dc.contributor.author | Venemans, B.P. | |
dc.contributor.author | McMahon, R.G. | |
dc.contributor.author | Allard, F. | |
dc.contributor.author | Baraffe, I. | |
dc.contributor.author | Navascue, D.B.Y. | |
dc.contributor.author | Carraro, G. | |
dc.contributor.author | Casewell, S.L. | |
dc.contributor.author | Chabrier, G. | |
dc.contributor.author | Chappelle, R.J. | |
dc.contributor.author | Clarke, F. | |
dc.contributor.author | Day-Jones, A.C. | |
dc.contributor.author | Deacon, N.R. | |
dc.contributor.author | Dobbie, P.D. | |
dc.contributor.author | Folkes, S.L. | |
dc.contributor.author | Hambly, N.C. | |
dc.contributor.author | Hewett, P.C. | |
dc.contributor.author | Hodgkin, S.T. | |
dc.contributor.author | Jones, H.R.A. | |
dc.contributor.author | Kendall, T.R. | |
dc.contributor.author | Magazzu, A. | |
dc.contributor.author | Martin, E.L. | |
dc.contributor.author | McCaughrean, M.J. | |
dc.contributor.author | Nakajima, T. | |
dc.contributor.author | Pavlenko, Y. | |
dc.contributor.author | Tamura, M. | |
dc.contributor.author | Tinney, C.G. | |
dc.contributor.author | Osorio, M.R.Z. | |
dc.date.accessioned | 2015-04-14T12:47:59Z | |
dc.date.issued | 2007-07-26 | |
dc.description.abstract | We present eight new T4.5-T7.5 dwarfs identified in the UKIRT (United Kingdom Infrared Telescope) Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS) Data Release 1 (DR1). In addition we have recovered the T4.5 dwarf SDSS J020742.91+000056.2 and the T8.5 dwarf ULAS J003402.77-005206.7. Photometric candidates were picked up in two-colour diagrams over 190 deg(2) (DR1) and selected in at least two filters. All candidates exhibit near-infrared spectra with strong methane and water absorption bands characteristic of T dwarfs and the derived spectral types follow the unified scheme of Burgasser et al.. We have found six new T4.5-T5.5 dwarfs, one T7 dwarf, one T7.5 dwarf and recovered a T4.5 dwarf and a T8.5 dwarf. We provide distance estimates which lie in the 15-85 pc range; the T7.5 and T8.5 dwarfs are probably within 25 pc of the Sun. We conclude with a discussion of the number of T dwarfs expected after completion of the LAS, comparing these initial results to theoretical simulations. | en_GB |
dc.description.sponsorship | NSF | en_GB |
dc.description.sponsorship | Alfred P. Sloan Research Fellowship | en_GB |
dc.identifier.citation | Vol. 379 (4), pp. 1423 - 1430 | en_GB |
dc.identifier.doi | 10.1111/j.1365-2966.2007.12023.x | |
dc.identifier.grantnumber | AST-0407441 | en_GB |
dc.identifier.grantnumber | AST-0507833 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/16799 | |
dc.language.iso | en | en_GB |
dc.publisher | Oxford University Press for Royal Astronomical Society | en_GB |
dc.subject | techniques : photometric | en_GB |
dc.subject | techniques : spectroscopic | en_GB |
dc.subject | surveys | en_GB |
dc.subject | stars : low-mass | en_GB |
dc.subject | brown dwarfs | en_GB |
dc.subject | infrared : stars | en_GB |
dc.subject | deep sky survey | en_GB |
dc.subject | spectral type-L | en_GB |
dc.subject | T-dwarfs | en_GB |
dc.subject | brown dwarf | en_GB |
dc.subject | ultracool dwarfs | en_GB |
dc.subject | infrared photometry | en_GB |
dc.subject | adaptive optics | en_GB |
dc.subject | L/T transition | en_GB |
dc.subject | mass function | en_GB |
dc.subject | telescope | en_GB |
dc.title | Eight new T4.5-T7.5 dwarfs discovered in the UKIDSS large area survey data release 1 | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2015-04-14T12:47:59Z | |
dc.identifier.issn | 0035-8711 | |
dc.description | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2007 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. | en_GB |
dc.identifier.eissn | 1365-2966 | |
dc.identifier.journal | Monthly Notices of the Royal Astronomical Society | en_GB |