J/MNRAS/461/1734ivo://CDS.VizieR/J/MNRAS/461/1734doi:10.26093/cds/vizier.74611734CDSDrass H.Haas M.Chini R.Bayo A.Hackstein M.Hoffmeister V.,Godoy N.Vogt N.2024-08-16T20:17:43Z2017-12-19T16:06:58ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-sourcesinfrared-photometryDue to its youth, proximity and richness, the Orion nebula cloud (ONC) is an ideal testbed to obtain a comprehensive view on the initial mass function (IMF) down to the planetary mass regime. Using the HAWK-I camera at the VLT, we have obtained an unprecedented deep and wide near-infrared JHK mosaic of the ONC (90 per cent completeness at K ~19.0mag, 22x28 arcmin^2^). Applying the most recent isochrones and accounting for the contamination of background stars and galaxies, we find that ONC's IMF is bimodal with distinct peaks at about 0.25 and 0.025M_{sun}_ separated by a pronounced dip at the hydrogen burning limit (0.08M_{sun}_), with a depth of about a factor of 2-3 below the log-normal distribution. Apart from ~920 low-mass stars (M<1.4M_{sun}_) the IMF contains ~760 brown dwarf candidates and ~160 isolated planetary mass object candidates with M>0.005M_{sun}_, hence about 10 times more substellar candidates than known before. The substellar IMF peak at 0.025M_{sun}_ could be caused by brown dwarfs and isolated planetary mass objects which have been ejected from multiple systems during the early star formation process or from circumstellar discs.2016MNRAS.461.1734Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/461/1734CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/502/883 : Very low mass ONC stars I photometry (Rodriguez-Ledesma+ 2009)J/AJ/139/950 : JHKs photometry in ONC (Robberto+, 2010)J/ApJ/722/1092 : Optical photometry of the ONC. II. (Da Rio+, 2010)J/ApJ/733/50 : ONC mid-IR photometric monitoring (Morales-Calderon+, 2011)J/A+A/593/A7 : NH and AV Towards YSOs in the ONC (Hasenberger+, 2016)J/AJ/150/132 : JHK photometry of 1203 variables in ONC (Rice+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/461/1734https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/461/1734http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/461/1734https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/461/1734https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/461/1734http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/461/1734GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/461/1734/tablea1 (Catalogue of the HAWK-I sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/461/1734/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/461/1734/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/461/1734/tablea1?GETtext/xml+votable180.050000true83.63214111-5.200766670.0055555555555555566/21438-21439 22804-228058.627874748287006e-20 1.6829020715966446e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/461/1734?format=asciiInfrareddefaultJ/MNRAS/461/1734/tablea1Catalogue of the HAWK-I sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainJmagHAWK-I J magnitude (1.25um)magphot.mag;em.IR.Jdoublee_Jmagrms uncertainty on Jmagmagstat.error;phot.mag;em.IR.JdoubleHmagHAWK-I H magnitude (1.65um)magphot.mag;em.IR.Hdoublee_Hmagrms uncertainty on Hmagmagstat.error;phot.mag;em.IR.HdoubleKsmagHAWK-I Ks magnitude (2.15um)magphot.mag;em.IR.Kdoublee_Ksmagrms uncertainty on Ksmagmagstat.error;phot.mag;em.IR.Kdouble