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dc.contributor.authorLucas, P.W.
dc.contributor.authorF. Roche, P.
dc.date.accessioned2011-12-15T13:01:06Z
dc.date.available2011-12-15T13:01:06Z
dc.date.issued2000-03-06
dc.identifier.citationLucas , P W & F. Roche , P 2000 , ' A Population of very young Brown Dwarfs and free-floating Planets in Orion ' , Monthly Notices of the Royal Astronomical Society , vol. 314 , pp. 858-864 . https://doi.org/10.1046/j.1365-8711.2000.03515.x
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 495740
dc.identifier.otherPURE UUID: c67678e9-50a8-4693-9375-3b72584eab41
dc.identifier.otherArXiv: http://arxiv.org/abs/astro-ph/0003061v2
dc.identifier.otherScopus: 0042851797
dc.identifier.urihttp://hdl.handle.net/2299/7295
dc.description13 pages, 5 figures, accepted by Monthly Notices of the Royal Astronomical Society
dc.description.abstractWe describe the results of a very deep imaging survey of the Trapezium Cluster in the IJH bands, using the UKIRT high resolution camera UFTI. Approximately 32% of the 515 point sources detected are brown dwarf candidates, including several free floating objects with masses below the Deuterium burning (planetary) threshold at 0.013 solar masses, which are detectable because of their extreme youth. We have confidence that almost all the sources detected are cluster members, since foreground contamination is minimal in the 33 arcmin^2 area surveyed and the dense backdrop of OMC-1 obscures all background stars at these wavelengths. Extinction is calculated from the (J-H)colours, permitting accurate luminosity estimates and temperatures are derived from the dereddened (I-J) colours. There is some evidence for a cut-off in the luminosity function below the level corresponding to several Jupiter masses, which may represent the bottom end of the IMF. Since star formation is complete in the Trapezium this limit could have wide significance, if confirmed. However, it could well be an effect of the dispersal of the molecular cloud by the central O-type stars, a process whose timescale will vary between star formation regions.en
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.subjectastro-ph
dc.titleA Population of very young Brown Dwarfs and free-floating Planets in Orionen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2000-03-06
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1046/j.1365-8711.2000.03515.x
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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