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dc.contributor.authorLodieu, N.
dc.contributor.authorBurningham, B.
dc.contributor.authorHambly, N.C.
dc.contributor.authorPinfield, D.J.
dc.date.accessioned2009-12-22T11:33:41Z
dc.date.available2009-12-22T11:33:41Z
dc.date.issued2009
dc.identifier.citationLodieu , N , Burningham , B , Hambly , N C & Pinfield , D J 2009 , ' Identifying nearby field T dwarfs in the UKIDSS Galactic Clusters Survey ' , Monthly Notices of the Royal Astronomical Society , vol. 397 , no. 1 , pp. 258-264 . https://doi.org/10.1111/j.1365-2966.2008.14384.x
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 156107
dc.identifier.otherPURE UUID: 3c7661ef-1133-4c3a-ad9a-38d730991c65
dc.identifier.otherdspace: 2299/4119
dc.identifier.otherScopus: 67650441784
dc.identifier.otherORCID: /0000-0003-4600-5627/work/64327359
dc.identifier.urihttp://hdl.handle.net/2299/4119
dc.description‘The definitive version is available at www3.interscience.wiley.com '. Copyright Royal Astronomical Society. DOI: 10.1111/j.1365-2966.2008.14384.x
dc.description.abstractWe present the discovery of two new late-T dwarfs identified in the UKIRT Infrared Deep Sky Survey (UKIDSS) Galactic Clusters Survey (GCS) Data Release 2 (DR2). These T dwarfs are nearby old T dwarfs along the line of sight to star-forming regions and open clusters targeted by the UKIDSS GCS. They are found towards the α Per cluster and Orion complex, respectively, from a search in 54 deg2 surveyed in five filters. Photometric candidates were picked up in two-colour diagrams, in a very similar manner to candidates extracted from the UKIDSS Large Area Survey (LAS) but taking advantage of the Z filter employed by the GCS. Both candidates exhibit near-infrared J-band spectra with strong methane and water absorption bands characteristic of late-T dwarfs. We derive spectral types of T6.5 ± 0.5 and T7 ± 1 and estimate photometric distances less than 50 pc for UGCS J030013.86+490142.5 and UGCS J053022.52−052447.4, respectively. The space density of T dwarfs found in the GCS seems consistent with discoveries in the larger areal coverage of the UKIDSS LAS, indicating one T dwarf in 6–11 deg2. The final area surveyed by the GCS, 1000 deg2 in five passbands, will allow expansion of the LAS search area by 25 per cent, increase the probability of finding ultracool brown dwarfs, and provide optimal estimates of contamination by old field brown dwarfs in deep surveys to identify such objects in open clusters and star-forming regions.en
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.titleIdentifying nearby field T dwarfs in the UKIDSS Galactic Clusters Surveyen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
rioxxterms.versionofrecordhttps://doi.org/10.1111/j.1365-2966.2008.14384.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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