J/MNRAS/492/2446ivo://CDS.VizieR/J/MNRAS/492/2446doi:10.26093/cds/vizier.74922446CDSPandey A.K.Sharma S.Kobayashi N.Sarugaku Y.Ogura K.2024-08-20T20:15:33Z2023-05-31T15:19:36ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectspre-main-sequence-starsinfrared-photometryvisible-astronomystellar-massesstellar-agesastronomical-modelsNew observations in the VI bands along with archival data from the 2MASS and WISE surveys have been used to generate a catalogue of young stellar objects (YSOs) covering an area of about 6{deg}x6{deg} in the Auriga region centred at l~173{deg} and b~1.5{deg}. The nature of the identified YSOs and their spatial distribution are used to study the star formation in the region. The distribution of YSOs along with that of the ionized and molecular gas reveals two ring-like structures stretching over an area of a few degrees each in extent. We name these structures as Auriga Bubbles 1 and 2. The centre of the Bubbles appears to be above the Galactic mid-plane. The majority of Class I YSOs are associated with the Bubbles, whereas the relatively older population, i.e. Class II objects are rather randomly distributed. Using the minimum spanning tree analysis, we found 26 probable subclusters having five or more members. The subclusters are between ~0.5 and ~3pc in size and are somewhat elongated. The star formation efficiency in most of the subcluster region varies between 5 per cent and 20 per cent indicating that the subclusters could be bound regions. The radii of these subclusters also support it.2020MNRAS.492.2446Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/492/2446CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)II/311 : WISE All-Sky Data Release (Cutri+ 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/492/2446https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/492/2446http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/492/2446https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/492/2446https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/492/2446http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/492/2446GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/492/2446/table5 (710 identified YSOs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/2446/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/2446/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/2446/table5?GETtext/xml+votable180.050000true79.5305838938.373308890.005555555555555556Cone search capability for table J/MNRAS/492/2446/table8 (Data for identified subclusters and active regions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/492/2446/table8?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/492/2446/table8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/492/2446/table8?GETtext/xml+votable180.050000true81.777238.516858330.0055555555555555565/324-326 333 336 338 6127 6138 6/1285 1287 1293 1308-1309 1311 1329 1350 1356 1376 24502-24503 24507 245468.157980699529898e-21 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/492/2446?format=asciiOpticalInfrareddefaultJ/MNRAS/492/2446/table5710 identified YSOsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/710] YSO identifiermeta.id;meta.mainintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainVmag? KWFC V-band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag? Error on Vmagmagstat.error;phot.magfloatnullableV-I? KWFC V-I colourmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I? Error on V-Imagstat.error;phot.color;em.opt.VfloatnullableJmag? 2MASS J-band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? Error on Jmagmagstat.error;phot.magfloatnullableHmag? 2MASS H-band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? Error on Hmagmagstat.error;phot.magfloatnullableKmag? 2MASS K-band magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? Error on Kmagmagstat.error;phot.magfloatnullableW1mag? WISE W1 (3.4um) band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_W1mag? Error on W1magmagstat.error;phot.magfloatnullableW2mag? WISE W2 (4.6um) band magnitudemagphot.mag;em.IR.4-8umfloatnullablee_W2mag? Error on W2magmagstat.error;phot.magfloatnullableW3mag? WISE W3 (12um) band magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_W3mag? Error on W3magmagstat.error;phot.magfloatnullableW4mag? WISE W4 (22um) band magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_W4mag? Error on W4magmagstat.error;phot.magfloatnullableClass[1/8] Classification of the YSO (1)meta.code.classintJ/MNRAS/492/2446/table7A table containing the stellar parameters of the selected 489 YSOs derived by using the SED fitting analysisrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/710] YSO identifiermeta.id;meta.mainintNNumber of input data pointsmeta.numberintModelNumber of SED models fitted to the datameta.numberintchi2Reduced chi-squared for the best-fitting modelstat.fit.chi2floatAvExtinctionmagphys.absorptionfloate_AvError on Avmagstat.errorfloatMassMass from SED fittingsolMassphys.massfloate_MassError on MasssolMassstat.error;phys.massfloatAgeAge from SED fittingMyrtime.agefloate_AgeError on AgeMyrstat.error;time.agefloatJ/MNRAS/492/2446/table8Data for identified subclusters and active regionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the subcluster or active region (gNN)meta.id;meta.maincharTypeObject type (Subcluster or Active region)src.classcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainNNumber of YSOs enclosed in the groupmeta.numberintVVertex of the convex hullstat.fit.paramintRhullHull radiuspcphys.size.radiusfloatRcirCircle radiuspcphys.size.radiusfloatAspectAspect ratiophys.size.axisRatiofloatsigmeanMean stellar density obtained by using the isodensity contourspc**-2src.densityfloatsigpeakPeak stellar density obtained by using the isodensity contourspc**-2src.densityfloatMSTMean minimum spanning tree (MST) branch lengthpcsrc.morph.scLengthfloatNN2Nearest neighbour distancepcpos.distancefloatClass1Number of Class I YSOsmeta.numberintClass2Number of Class II YSOsmeta.numberintFracPercentage of Class I YSOs (Class1/N*100)%meta.numberintJ/MNRAS/492/2446/table9Properties of the identified subclusters and active regionsNameName of the subcluster or active region (gNN)meta.id;meta.maincharTypeObject type (Subcluster or Active region)src.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAvmean? Mean extinctionmagphys.absorptionfloatnullableAvpeak? Peak extinctionmagphys.absorptionfloatnullableMass? Cloud mass in the convex hull derived by using the extinction mapsolMassphys.mass;obs.fielddoublenullableMass0.8? Mass of the dense cloud having A_K_ greater than 0.8magsolMassphys.massfloatnullableJ1? Jeans length for Class I and Class II sources onlypcpos.distance;phys.sizefloatnullableJ2? Jeans length with inclusion of assumed missing contribution of Class III sourcespcpos.distance;phys.sizefloatnullableQ? Structural Q parameterpos.distance;arith.ratiofloatnullableSFE1? Star formation efficiency for Class I and Class II sources only (1)%phys.mass;arith.ratiofloatnullableSFE2? Star formation efficiency with inclusion of assumed missing contribution of Class III sources (1)%phys.mass;arith.ratiofloatnullableJ/SYSO1? Ratio of the Jeans length to the mean separation of YSOs for Class I and Class II sources onlyphys.size;arith.ratiofloatnullableJ/SYSO2? Ratio of the Jeans length to the mean separation of YSOs with inclusion of assumed missing contribution of Class III sourcesphys.size;arith.ratiofloatnullable