J/ApJ/833/85ivo://CDS.VizieR/J/ApJ/833/85doi:10.26093/cds/vizier.18330085CDSBaug T.Dewangan L.K.Ojha D.K.Ninan J.P.2018-12-03T12:58:13Z2017-04-19T09:14:53ZCDS support team

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

cds-question@unistra.frinfrared-photometrystellar-spectral-typesextinctionyoung-stellar-objectsob-starsstellar-agesstellar-massesinterstellar-mediumWe have performed a multi-wavelength analysis of a mid-infrared (MIR) bubble N37 and its surrounding environment. The selected 15'x15' area around the bubble contains two molecular clouds (N37 cloud; V_lsr_~37-43km/s, and C25.29+0.31; V_lsr_~43-48km/s) along the line of sight. A total of seven OB stars are identified toward the bubble N37 using photometric criteria, and two of them are spectroscopically confirmed as O9V and B0V stars. The spectro-photometric distances of these two sources confirm their physical association with the bubble. The O9V star appears to be the primary ionizing source of the region, which is also in agreement with the desired Lyman continuum flux analysis estimated from the 20cm data. The presence of the expanding HII region is revealed in the N37 cloud, which could be responsible for the MIR bubble. Using the ^13^CO line data and photometric data, several cold molecular condensations as well as clusters of young stellar objects (YSOs) are identified in the N37 cloud, revealing ongoing star formation (SF) activities. However, the analysis of ages of YSOs and the dynamical age of the HII region do not support the origin of SF due to the influence of OB stars. The position-velocity analysis of ^13^CO data reveals that two molecular clouds are interconnected by a bridge-like structure, favoring the onset of a cloud-cloud collision process. The SF activities (i.e., the formation of YSO clusters and OB stars) in the N37 cloud are possibly influenced by the cloud-cloud collision.2016ApJ...833...85Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/833/85CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)II/316 : UKIDSS-DR6 Galactic Plane Survey (Lucas+ 2012)II/293 : GLIMPSE Source Catalog (I + II + 3D) (IPAC 2008)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)III/195 : Atlas of Optical Spectral Classification OB Stars (Walborn+ 1990)VII/50 : CO Radial Velocities Toward Galactic H II Regions (Blitz+ 1982)J/MNRAS/447/2307 : Galactic HII region IRAS 16148-5011 content (Mallick+, 2015)J/AJ/149/64 : MIPSGAL 24{mu}m point source catalog (Gutermuth+, 2015)J/A+A/569/A125 : Spiral structure of the Milky Way (Hou+, 2014)J/ApJS/209/2 : The BGPS. X. Dense molecular gas (Shirley+, 2013)J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)J/MNRAS/424/2442 : Catalog of bubbles from Milky Way Project (Simpson+, 2012)J/A+A/544/A146 : ATLASGAL cold high-mass clumps with NH_3_ (Wienen+, 2012)J/A+A/534/A114 : UBV photometry in RCW173 (Marco+, 2011)J/A+A/505/405 : A catalogue of Spitzer dark clouds (Peretto+, 2009)J/ApJS/184/18 : Spitzer survey of young stellar clusters (Gutermuth+, 2009)J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)J/ApJS/181/255 : CO in Galactic HII regions (Anderson+, 2009)J/ApJ/670/428 : Bubbles in the galactic disk. II. (Churchwell+, 2007)J/ApJ/654/316 : X-ray sources in IC 1396N (Getman+, 2007)J/ApJ/649/759 : Bubbles in the galactic disk (Churchwell+, 2006)J/A+A/457/637 : UBVJHK synthetic photom. of Galactic O stars (Martins+, 2006)J/AJ/131/2525 : MAGPIS 20cm survey (Helfand+, 2006)J/AJ/131/1574 : Infrared photometry of IC348 members (Lada+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/833/85https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/833/85http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/833/85https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/833/85https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/833/85http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/833/85GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/833/85/table1 (Details of the photometrically identified OB stars toward the N37 region)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/833/85/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/833/85/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/833/85/table1?GETtext/xml+votable180.050000true279.0775-6.65250.005555555555555556Cone search capability for table J/ApJ/833/85/table2 (Physical parameters of selected YSOs derived from the SED modeling)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/833/85/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/833/85/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/833/85/table2?GETtext/xml+votable180.050000true278.995-6.7219440.0055555555555555566/30218 30219 302402.0616683193919197e-20 1.692669228152603e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/833/85?format=asciiInfrareddefaultJ/ApJ/833/85/table1Details of the photometrically identified OB stars toward the N37 regionSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqOB star sequence numbermeta.id;meta.mainintRAJ2000[18] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[6] Degree of Declination (J2000)pos.eq.dec;meta.mainJmag[10.1/15.3] UKIDSS/GPS v6 J magnitudemagphot.mag;em.IR.JfloatHmag[9.6/13.5] UKIDSS/GPS v6 H magnitudemagphot.mag;em.IR.HfloatKmag[9.3/12.6] UKIDSS/GPS v6 K magnitudemagphot.mag;em.IR.Kfloat[3.6][10.1/15.6] GLIMPSE Spitzer/IRAC 3.6 magnitudemagphot.mag;em.IR.3-4umfloat[4.5][9.6/13.6] GLIMPSE Spitzer/IRAC 4.5 magnitudemagphot.mag;em.IR.4-8umfloat[5.8][9.3/12.7] GLIMPSE Spitzer/IRAC 5.8 magnitudemagphot.flux.density;em.IR.4-8umfloat[8.0][8.1/12]? GLIMPSE Spitzer/IRAC 8.0 magnitudemagphot.flux.density;em.IR.8-15umfloatnullableAv[6.1/19.8] Extinction, V band, Indebetouw et al. (2005ApJ...619..931I) lawmagphys.absorption;em.opt.VfloatJMag[-4.1/-1.7] Absolute J magnitude (1)magphys.magAbs;em.IR.JfloatHMag[-3.9/-1.7] Absolute H magnitude (1)magphys.magAbs;em.IR.HfloatKMag[-3.9/-1.6] Absolute K magnitude (1)magphys.magAbs;em.IR.KfloatSpTMK spectral typesrc.spTypecharf_SpT[1/2]? Flag on spectral type (2)meta.codeintnullableUKIDSSDisplay UKIDSS data from UKIDSS-DR6 (Cat. II/316) within 1.5"meta.ref.urlcharGLIMPSEDisplay GLIMPSE data within 1" (Cat. II/293)meta.ref.urlchar2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 1.5"meta.ref.urlcharJ/ApJ/833/85/table2Physical parameters of selected YSOs derived from the SED modelingSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[18] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[6] Degree of Declination (J2000)pos.eq.dec;meta.mainLocFlag on location (1)meta.codecharlogAge[3.5/7] Derived YSO agelog(yr)time.agefloate_logAge[0.01/1.3] Uncertainty in logAgelog(yr)stat.error;time.agefloatMass[0.9/14.6] Derived YSO masssolMassphys.massfloate_Mass[0.08/2.5] Uncertainty in MasssolMassstat.error;phys.massfloatlogLum[1.3/2] Derived log total luminositylog(solLum)phys.luminosityfloate_logLum[0.01/0.4] Uncertainty in logLumlog(solLum)stat.errorfloatAv[0.1/50] Derived Extinction, V bandmagphys.absorption;em.opt.Vfloate_Av[0.01/17] Uncertainty in Avmagstat.errorfloatClassObjection evolutionary class ("Class I": 15 sources, "Class II": 54 sources or "Flat Spec": 12 sources)src.classcharUKIDSSDisplay UKIDSS data from UKIDSS-DR6 (Cat. II/316) within 1.5"meta.ref.urlcharGLIMPSEDisplay GLIMPSE data within 1" (Cat. II/293)meta.ref.urlchar2MDisplay the 2MASS data (Cutri+ 2003, II/246) within 1.5"meta.ref.urlchar