J/MNRAS/361/211ivo://CDS.VizieR/J/MNRAS/361/211doi:10.26093/cds/vizier.73610211CDSLucas P.W.Roche P.F.Tamura M.2024-07-01T20:15:04Z2006-07-08T18:41:44ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frsurveysopen-star-clusterspre-main-sequence-starsdwarf-starsinfrared-photometryWe report the results of a deep near-infrared (JHK) survey of the outer parts of the Trapezium Cluster with Gemini South/Flamingos. 396 sources were detected in a 26-arcmin^2^ area, including 138 brown dwarf candidates, defined as M<0.075M_{sun}_ for an assumed age of 1Myr. Only 33 of the brown dwarf candidates are planetary mass candidates with estimated masses in the range 0.003<M<0.012M_{sun}_. In an extinction-limited sample (AV<5) complete to approximately 0.005M_{sun}_ (5M_Jup_) the mass function appears to drop by a factor of 2 at the deuterium burning threshold, i.e. at planetary masses. After allowing for background contamination it is likely that planetary mass objects at 3-13M_Jup_ number <10% of the cluster population, with an upper limit of 13%. Analysis of the spatial distribution of stars and brown dwarf candidates suggests that brown dwarfs and very low-mass stars (M<0.1M_{sun}_) are less likely than more massive stars to have wide (>150AU) binary companions.2005MNRAS.361..211Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/361/211CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/429/1007 : RIJHK phot. of VLM objects near eps Ori (Scholz+, 2005)J/AJ/127/2856 : Brown dwarfs in the 2MASS Survey (Burgasser+, 2004)J/MNRAS/356/89 : sigma Ori low-mass stars (Kenyon+, 2005)J/AN/325/705 : RIJHKs of low-mass stars in sigma Ori (Bejar+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/361/211https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/361/211http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/361/211https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/361/211https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/361/211http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/361/211GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/361/211/table2 (Source catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/361/211/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/361/211/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/361/211/table2?GETtext/xml+votable180.050000true83.814125-5.463086110.0055555555555555566/21438-21439https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/361/211?format=asciiInfrareddefaultJ/MNRAS/361/211/table2Source cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[LRT2005]Sequential numbermeta.recordintNameCoordinate based ID (SSs-MSS or MSSs-MSS))meta.idcharn_Name[e] Note on Name (1)meta.notecharRAJ2000Right ascension (J2000.0) (2)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainKmagK (2.2um) magnitude (3)magphot.mag;em.IR.Kfloatr_KmagReference for K flux (5)meta.bibintHmagH (1.65um) magnitude (3)magphot.mag;em.IR.Hfloatr_HmagReference for H flux (5)meta.bibintJmagJ (1.25um) magnitude (3)magphot.mag;em.IR.Jfloatr_JmagReference for J flux (5)meta.bibintFlagFlag about flux incertainty (4)meta.code.errorchar