J/MNRAS/447/2307ivo://CDS.VizieR/J/MNRAS/447/2307doi:10.26093/cds/vizier.74472307CDSMallick K.K.Ojha D.K.Tamura M.Linz H.Samal M.R.Ghosh S.K.2024-08-14T20:19:39Z2015-12-04T15:05:03ZCDS support team

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

cds-question@unistra.frh-ii-regionsinfrared-photometrystellar-massesAn investigation of the IRAS 16148-5011 region - a cluster at a distance of 3.6kpc - is presented here, carried out using multiwavelength data in near-infrared (NIR) from the 1.4m Infrared Survey Facility telescope, mid-infrared (MIR) from the archival Spitzer GLIMPSE (Galactic Legacy Infrared Midplane Survey Extraordinaire) survey, far-infrared (FIR) from the Herschel archive, and low-frequency radio continuum observations at 1280 and 843MHz from the Giant Metrewave Radio Telescope and Molonglo Survey archive, respectively. A combination of NIR and MIR data is used to identify 7 Class I and 133 Class II sources in the region. Spectral energy distribution (SED) analysis of selected sources reveals a 9.6M_{sun}_ high-mass source embedded in nebulosity. However, Lyman continuum luminosity calculation using radio emission - which shows a compact HII region - indicates the spectral type of the ionizing source to be earlier than B0-O9.5. Free-free emission SED modelling yields the electron density as 138cm^-3^, and thus the mass of the ionized hydrogen as ~16.4M_{sun}_. Thermal dust emission modelling, using the FIR data from Herschel and performing modified blackbody fits, helped us construct the temperature and column density maps of the region, which show peak values of 30K and 3.3x10^22^cm^-2^, respectively. The column density maps reveal an A_V_>20mag extinction associated with the nebular emission, and weak filamentary structures connecting dense clumps. The clump associated with this IRAS object is found to have dimensions of ~1.1pcx0.8pc, and a mass of 10^23^M_{sun}_.2015MNRAS.447.2307Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/447/2307CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/447/2307https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/447/2307http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/447/2307https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/447/2307https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/447/2307http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/447/2307GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/447/2307/table1 (YSOs identified using NIR and MIR data)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/447/2307/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/447/2307/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/447/2307/table1?GETtext/xml+votable180.050000true244.575165-50.3650250.005555555555555556Cone search capability for table J/MNRAS/447/2307/table2 (Main parameters from SED analysis)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/447/2307/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/447/2307/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/447/2307/table2?GETtext/xml+votable180.050000true244.59108-50.2853550.0055555555555555566/42172 421742.483060040379131e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/447/2307?format=asciiInfrareddefaultJ/MNRAS/447/2307/table1YSOs identified using NIR and MIR datarecnoRecord 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.mainJmag? IRSF J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? rms uncertainty on Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? IRSF H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? rms uncertainty on Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKsmag? IRSF Ks magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? rms uncertainty on Ksmagmagstat.error;phot.mag;em.IR.Kfloatnullable[3.6]? IRAC 3.6um magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? rms uncertainty on [3.6]magstat.errorfloatnullable[4.5]? IRAC 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? rms uncertainty on [4.5]magstat.errorfloatnullable[5.8]? IRAC 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? rms uncertainty on [5.8]magstat.errorfloatnullable[8.0]? IRAC 8.0um magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? rms uncertainty on [8.0]magstat.errorfloatnullableYSOYSO Type (Class1 or Class2)src.classcharSource[1/27]? Source sequential number in table2meta.recordintnullableJ/MNRAS/447/2307/table2Main parameters from SED analysisn_Source[abc, ] Note on Source (2)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintType[I E] Source type (1)src.classcharSource[1/28] Source sequential numbermeta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainlogtau*Age of the central sourcelog(yr)time.agefloate_logtau*rms uncertainty on logtau*log(yr)stat.errorfloatMassMass of the central sourcelog(solMass)phys.massfloate_Massrms uncertainty on Masslog(solMass)stat.error;phys.massfloatlogMd? Disc masslog(solMass)phys.massfloatnullablee_logMd? rms uncertainty on logMdlog(solMass)stat.errorfloatnullablelogdMd/dt? Disc accretion ratelog(solMass.yr**-1)arith.ratefloatnullablee_logdMd/dt? rms uncertainty on logdMd/dtlog(solMass.yr**-1)stat.errorfloatnullablelogMenv? Envelope masslog(solMass)phys.massfloatnullablee_logMenv? rms uncertainty on logMenvlog(solMass)stat.errorfloatnullablelogT*Temperature of the central sourcelog(K)phys.temperaturefloate_logT*? rms uncertainty on logT*log(K)stat.errorfloatnullablelogLtotTotal system luminositylog(solLum)phys.luminosityfloate_logLtot? rms uncertainty on logLtotlog(solLum)stat.errorfloatnullableAVInterstellar visual extinctionmagphys.absorption;em.opt.Vfloate_AV? rms uncertainty on AVmagstat.errorfloatnullablechi2minMinimum chi^2^ per data pointstat.fit.chi2float