J/MNRAS/355/1237ivo://CDS.VizieR/J/MNRAS/355/1237doi:10.26093/cds/vizier.73551237CDSHagele G.F.Albacete Colombo J.F.Barba R.H.Bosch G.L.2024-06-30T20:16:42Z2006-02-09T07:17:41ZCDS support team

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

cds-question@unistra.frstellar-associationspre-main-sequence-starsinfrared-photometryWe have studied the properties of an infrared cluster embedded in the gas and dust of the southern part of the Carina nebula (NGC 3372), where the probable existence of current star formation has already been predicted. We used mid-infrared (A and C bands) and near-infrared (JHKs) images from the Midcourse Space Experiment and the Two-Micron All-Sky Survey, respectively, combined with an optical H{alpha} narrow-band filter image obtained at the Cerro Tololo Inter-American Observatory. The infrared star cluster has at least 17 members, and its parameters, radius and stellar density are in very good agreement with high- to intermediate-mass star formation scenarios. The detected infrared sources have roughly the same intrinsic infrared excess determined from their position in colour-colour and colour-magnitude diagrams, suggesting that these objects could be related to pre-main-sequence stars of high to intermediate mass. Furthermore, we present a low-dispersion spectrum of the LS 1883 (O9.5V) star located near the centre of the infrared cluster. The position of this object in the colour-colour and colour-magnitude infrared diagrams lies close to the reddening vector of a zero-age main-sequence O9V spectral-type star, and it seems to be the first star of this cluster to emerge. All these facts are consistent with the current star-forming scenarios associated with highly embedded star clusters.2004MNRAS.355.1237Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/355/1237CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/AJ/126/1423 : MSX 8.3um fluxes of star-forming regions (Kraemer+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/355/1237https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/355/1237http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/355/1237https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/355/1237https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/355/1237http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/355/1237GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/355/1237/table1 (2MASS photometry for the IR star cluster candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/355/1237/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/355/1237/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/355/1237/table1?GETtext/xml+votable180.050000true161.460265-59.951053890.0055555555555555566/380168.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/355/1237?format=asciiInfrareddefaultJ/MNRAS/355/1237/table12MASS photometry for the IR star cluster candidates[HAB2004b]Identification, according to Fig. 1(b).charrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainJmag2MASS J (1.25um) magnitudemagfloate_Jmag? rms uncertainty on JmagmagfloatnullableHmag2MASS H (1.65um) magnitudemagfloate_Hmag? rms uncertainty on HmagmagfloatnullableKsmag2MASS Ks (2.17um) magnitudemagfloate_Ksmag? rms uncertainty on KsmagmagfloatnullableH-Ks2MASS H-Ks colour indexmagfloate_H-Ks? rms uncertainty on H-KsmagfloatnullableJ-H2MASS J-H colour indexmagfloate_J-H? rms uncertainty on J-Hmagfloatnullable