J/MNRAS/468/2684ivo://CDS.VizieR/J/MNRAS/468/2684doi:10.26093/cds/vizier.74682684CDSPanwar N.Samal M.R.Pandey A.K.Jose J.Chen W.P.Ojha D.K.,Ogura K.Singh H.P.Yadav R.K.2024-08-17T20:18:38Z2020-04-06T12:46:49ZCDS support team

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

cds-question@unistra.frh-ii-regionsyoung-stellar-objectsinfrared-photometrystellar-massesstellar-agesW4 is a giant HII region ionized by the OB stars of the cluster IC 1805. The HII region/cluster complex has been a subject of numerous investigations as it is an excellent laboratory for studying the feedback effect of massive stars on the surrounding region. However, the low-mass stellar content of the cluster IC 1805 remains poorly studied till now. With the aim to unravel the low-mass stellar population of the cluster, we present the results of a multiwavelength study based on deep optical data obtained with the Canada-France-Hawaii Telescope, infrared data from Two Micron All Sky Survey and SpitzerSpace Telescope and X-ray data from ChandraSpace Telescope. The present optical data set is complete enough to detect stars down to 0.2M_{sun}_, which is the deepest optical observation so far for the cluster. We identified 384 candidate young stellar objects (YSOs; 101 Class I/II and 283 Class III) within the cluster using various colour-colour and colour-magnitude diagrams. We inferred the mean age of the identified YSOs to be ~2.5Myr and mass in the range 0.3-2.5M_{sun}_. The mass function of our YSO sample has a power-law index of -1.23+/-0.23, close to the Salpeter value (-1.35), and consistent with those of other star-forming complexes. We explored the disc evolution of the cluster members and found that the disc-less sources are relatively older compared to the disc bearing YSO candidates. We examined the effect of high-mass stars on the circumstellar discs and within uncertainties, the influence of massive stars on the disc fraction seems to be insignificant. We also studied the spatial correlation of the YSOs with the distribution of gas and dust of the complex to conclude that IC 1805 would have formed in a large filamentary cloud.2017MNRAS.468.2684Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/468/2684CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/554/A3 : Vilnius photometry of IC1805 stars (Straizys+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/468/2684https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/468/2684http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/468/2684https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/468/2684https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/468/2684http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/468/2684GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/468/2684/table3 (YSOs from 2MASS, and IRAC/MIPS data for the cluster area)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/468/2684/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/468/2684/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/468/2684/table3?GETtext/xml+votable180.050000true38.2409288961.374401110.005555555555555556Cone search capability for table J/MNRAS/468/2684/table4 (Magnitudes, age and mass of the YSOs in the cluster region)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/468/2684/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/468/2684/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/468/2684/table4?GETtext/xml+votable180.050000true37.8882288961.429278890.0055555555555555566/33078.27688880188539e-21 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/468/2684?format=asciiInfrareddefaultJ/MNRAS/468/2684/table3YSOs from 2MASS, and IRAC/MIPS data for the cluster arearecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAllDisplay data of this star in the two tablesmeta.ref.urlcharId[1/384] Sequential number within the tablemeta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainJmag? 2MASS J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? 2MASS J magnitude errormagstat.error;phot.magfloatnullableHmag? 2MASS H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? 2MASS H magnitude errormagstat.error;phot.magfloatnullableKsmag? 2MASS Ks magnitudemagphot.mag;em.IR.Kfloatnullablee_Ksmag? 2MASS Ks magnitude errormagstat.error;phot.magfloatnullable[3.6]? IRAC 3.6um magnitudemagphot.mag;em.IR.3-4umfloatnullablee_[3.6]? IRAC 3.6um magnitude errormagstat.errorfloatnullable[4.5]? IRAC 4.5um magnitudemagphot.mag;em.IR.4-8umfloatnullablee_[4.5]? IRAC 4.5um magnitude errormagstat.errorfloatnullable[5.8]? IRAC 5.8um magnitudemagphot.flux.density;em.IR.4-8umfloatnullablee_[5.8]? IRAC 5.8um magnitude errormagstat.errorfloatnullable[8.0]? IRAC 8.0um magnitudemagphot.flux.density;em.IR.8-15umfloatnullablee_[8.0]? IRAC 8.0um magnitude errormagstat.errorfloatnullable[24]? MIPS 24um magnitudemagphot.flux.density;em.IR.15-30umfloatnullablee_[24]? MIPS 24um magnitude errormagstat.errorfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/468/2684/table4Magnitudes, age and mass of the YSOs in the cluster regionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAllDisplay data of this star in the two tablesmeta.ref.urlcharId[1/370] Sequential number within the tablemeta.recordintRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainVmagV magnitudemagphot.mag;em.opt.Vfloate_VmagV magnitude errormagstat.error;phot.magfloatRmagR magnitudemagphot.mag;em.opt.Rfloate_RmagR magnitude errormagstat.error;phot.magfloatl_AgeLimit flag on Agemeta.code.error;time.agecharAgeAgeMyrtime.agefloate_Age? Age errorMyrstat.error;time.agefloatnullableMassMasssolMassphys.massfloate_MassMass errorsolMassstat.error;phys.massfloat