J/MNRAS/496/3358ivo://CDS.VizieR/J/MNRAS/496/3358doi:10.26093/cds/vizier.74963358CDSTapia M.Persi P.Roth M.Elia D.2024-08-21T20:15:24Z2020-07-16T13:15:34ZCDS support team

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

cds-question@unistra.frh-ii-regionsinfrared-photometryopen-star-clustersIRAS 12272-6240 is a complex star-forming region with a compact massive dense clump (DC) and several associated masers, located at a well-determined distance of d=9.3kpc from the Sun. For this study, we obtained sub-arcsec broad- and narrow-band near-infrared (near-IR) imaging and low-resolution spectroscopy with the Baade/Magellan telescope and its camera PANIC. Mosaics of size 2x2arcmin^2^ in the JHKs bands and with narrow-band filters centred in the 2.12um H_2_ and 2.17um Br{gamma} lines were analysed in combination with Hi-GAL/Herschel and archive IRAC/Spitzer and WISE observations. We found that the compact DC houses two Class I young stellar objects (YSOs) that probably form a 21000-au-wide binary system. Its combined 1-1200um spectral energy distribution is consistent with an O9V central star with a 10^-2^M_{sun}_ disc and a 1.3x10^4^M_{sun}_ dust envelope. Its total luminosity is 8.5x10^4^L_{sun}_. A series of shocked H_2_ emission knots are found in its close vicinity, confirming the presence of outflows. IRAS 12272-6240 is at the centre of an embedded cluster with a mean age of 1Myr and 2.6pc in size that contains more than 150 stars. At its nucleus, we found a more compact and considerably younger subcluster containing the YSOs. We also identified and classified the O-type central stars of two dusty radio/IR HII regions flanking the protostars. Our results confirm that these elements form a single giant young complex where massive star formation processes started some 1Myr ago and are still active.2020MNRAS.496.3358Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/496/3358CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/496/3358https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/496/3358http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/496/3358https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/496/3358https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/496/3358http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/496/3358GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/496/3358/jhkphot (Individual JHKs photometry)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/496/3358/jhkphot?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/3358/jhkphot?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/3358/jhkphot?GETtext/xml+votable180.050000true187.5207083-62.96416670.0055555555555555566/430157.952274030004205e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/496/3358?format=asciiInfrareddefaultJ/MNRAS/496/3358/jhkphotIndividual JHKs photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIdIdentification numbermeta.noteintRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.mainJmag? J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Uncertainty of J magnitudemagphot.mag;em.IR.JfloatnullableHmagH magnitudemagphot.mag;em.IR.Hfloate_HmagUncertainty of H magnitudemagphot.mag;em.IR.HfloatKsmagKs magnitudemagphot.mag;em.IR.Kfloate_KsmagUncertainty of Ks magnitudemagphot.mag;em.IR.Kfloat