Show simple item record

dc.contributor.authorBurningham, B.
dc.contributor.authorPinfield, D.J.
dc.contributor.authorLucas, P.W.
dc.contributor.authorLeggett, S.K.
dc.contributor.authorDeacon, Niall
dc.contributor.authorTamura, M.
dc.contributor.authorTinney, C.G.
dc.contributor.authorLodieu, N.
dc.contributor.authorZhang, Z.
dc.contributor.authorHuelamo, N.
dc.contributor.authorJones, H.R.A.
dc.contributor.authorMurray, D.N.
dc.contributor.authorMortlock, D.J.
dc.contributor.authorPatel, M.
dc.contributor.authorBarrado y Navascues, D.
dc.contributor.authorZapatero Osorio, M.R.
dc.contributor.authorIshii, M.
dc.contributor.authorKuzuhara, M.
dc.contributor.authorSmart, R.L.
dc.date.accessioned2011-02-01T15:44:32Z
dc.date.available2011-02-01T15:44:32Z
dc.date.issued2010
dc.identifier.citationBurningham , B , Pinfield , D J , Lucas , P W , Leggett , S K , Deacon , N , Tamura , M , Tinney , C G , Lodieu , N , Zhang , Z , Huelamo , N , Jones , H R A , Murray , D N , Mortlock , D J , Patel , M , Barrado y Navascues , D , Zapatero Osorio , M R , Ishii , M , Kuzuhara , M & Smart , R L 2010 , ' 47 new T dwarfs from the UKIDDS large area survey ' , Monthly Notices of the Royal Astronomical Society , vol. 406 , no. 3 , pp. 1885-1906 . https://doi.org/10.1111/j.1365-2966.2010.16800.x
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 165536
dc.identifier.otherPURE UUID: 66b1f640-3c2c-4514-be26-92dd83290bdd
dc.identifier.otherdspace: 2299/5269
dc.identifier.otherScopus: 77955262073
dc.identifier.urihttp://hdl.handle.net/2299/5269
dc.descriptionThe definitive version can be found at: http://onlinelibrary.wiley.com Copyright Royal Astronomical Society
dc.description.abstractWe report the discovery of 47 new T dwarfs in the Fourth Data Release (DR4) from the Large Area Survey (LAS) of the United Kingdom Infrared Telescope (UKIRT) Infrared Deep Sky Survey with spectral types ranging from T0 to T8.5. These bring the total sample of LAS T dwarfs to 80 as of DR4. In assigning spectral types to our objects we have identified eight new spectrally peculiar objects, and divide seven of them into two classes. H2O-H-early have a H2O-H index that differs with the H2O-J index by at least two subtypes. CH4-J-early have a CH4-J index that disagrees with the H20-J index by at least two subtypes. We have ruled out binarity as a sole explanation for both types of peculiarity, and suggest that they may represent hitherto unrecognized tracers of composition and/or gravity. Clear trends in z′(AB) −J and Y−J are apparent for our sample, consistent with weakening absorption in the red wing of the K i line at 0.77 μm with decreasing effective temperature. We have used our sample to estimate space densities for T6–T9 dwarfs. By comparing our sample to Monte Carlo simulations of field T dwarfs for various mass functions of the form ψ(M) ∝ M− pc−3 M−1⊙, we have placed weak constraints on the form of the field mass function. Our analysis suggests that the substellar mass function is declining at lower masses, with negative values of preferred. This is at odds with results for young clusters that have been generally found to have > 0. [see original online abstract for correct notation]en
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.title47 new T dwarfs from the UKIDDS large area surveyen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dcterms.dateAccepted2010
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1111/j.1365-2966.2010.16800.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record