J/ApJ/642/972ivo://CDS.VizieR/J/ApJ/642/972doi:10.26093/cds/vizier.16420972CDSYoung E.T.Teixeira P.S.Lada C.J.Muzerolle J.Persson S.E.,Murphy D.C.Siegler N.Marengo M.Krause O.Mainzer A.K.2008-12-27T09:30:22Z2008-12-27T10:26:18ZCDS support team

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

cds-question@unistra.fropen-star-clusterspre-main-sequence-starsinfrared-photometryWe analyze Spitzer and Magellan observations of a star-forming core near IRS 2 in the young cluster NGC 2264. The submillimeter source IRAS 12 S1, previously believed to be an intermediate-mass Class 0 object is shown to be a dense collection of embedded, low-mass stars. We argue that this group of stars represents the fragmenting collapse of a dense, turbulent core, using a number of indicators of extreme youth. With reasonable estimates for the velocity dispersion in the group, we estimate a dynamical lifetime of only a few times 10^4^yr. Spectral energy distributions of stars in the core are consistent with Class I or Class 0 assignments. We present observations of an extensive system of molecular hydrogen emission knots. The luminosity of the objects in the core region are consistent with roughly solar mass protostars.2006ApJ...642..972Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/642/972CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/345/521 : BVRI photometry of NGC 2264 (Flaccomio+, 1999)J/A+A/355/651 : HRI observations of PMS stars in NGC 2264 (Flaccomio+, 2000)J/A+A/455/903 : ACIS-I observations of NGC 2264 (Flaccomio+, 2006)J/AJ/114/2644 : UBVRIHa photometry of NGC2264 (Sung+, 1997)J/AJ/123/1528 : UBV(RI)_C_ and JHK photometry in NGC 2264 (Rebull+, 2002)J/AJ/127/2228 : VRI photometry of PMS stars in NGC 2264 OB (Makidon+, 2004)J/AJ/128/1684 : NGC 2264: VRIH{alpha} photometry (Sung+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/642/972https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/642/972http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/642/972https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/642/972https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/642/972http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/642/972GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/642/972/table1 (Sources in the IRAS 12 S1 core)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/642/972/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/642/972/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/642/972/table1?GETtext/xml+votable180.050000true100.25559.58130560.0055555555555555566/23637https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/642/972?format=asciiInfrareddefaultJ/ApJ/642/972/table1Sources in the IRAS 12 S1 corerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[YTL2006]Star ID (1)meta.id;meta.mainintn_[YTL2006][d] "d" for V608 Mon (2)meta.notecharRAJ2000Hour of Right Ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000.0)pos.eq.dec;meta.mainJmag? PANIC J band magnitude (3)magphot.mag;em.IR.JfloatnullableHmag? PANIC H band magnitude (3)magphot.mag;em.IR.HfloatnullableKmag? PANIC K band magnitude (3)magphot.mag;em.IR.Kfloatnullable3.6mag? Magnitude at 3.6{mu}mmagphot.mag;em.IR.3-4umfloatnullable4.5mag? Magnitude at 4.5{mu}mmagphot.mag;em.IR.4-8umfloatnullable5.8mag? Magnitude at 5.8{mu}mmagphot.flux.density;em.IR.4-8umfloatnullable8.0mag? Magnitude at 8.0{mu}mmagphot.flux.density;em.IR.8-15umfloatnullable24mag? Magnitude at 24{mu}mmagphot.flux.density;em.IR.15-30umfloatnullablef_24mag[abce] Confusion flag on 24mag (4)meta.codechar2MASSJ2MASS name (HHMMSSss+DDMMSSs)meta.idchar