J/ApJ/764/61ivo://CDS.VizieR/J/ApJ/764/61doi:10.26093/cds/vizier.17640061CDSCyganowski C.J.Koda J.Rosolowsky E.Towers S.Meyer J.D.Egusa F.,Momose R.Robitaille T.P.2017-06-28T06:58:25Z2014-11-17T12:00:02ZCDS support team

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

cds-question@unistra.frinfrared-sourcesradio-astronomyastrophysical-masersyoung-stellar-objectssurveysinterstellar-mediumWe present the results of a Nobeyama 45m H_2_O maser and NH_3_ survey of all 94 northern GLIMPSE extended green objects (EGOs), a sample of massive young stellar objects (MYSOs) identified based on their extended 4.5{mu}m emission. We observed the NH_3_(1,1), (2,2), and (3,3) inversion lines, and detected emission toward 97%, 63%, and 46% of our sample, respectively (median rms~50mK). The H_2_O maser detection rate is 68% (median rms~0.11Jy). The derived H_2_O maser and clump-scale gas properties are consistent with the identification of EGOs as young MYSOs. To explore the degree of variation among EGOs, we analyze subsamples defined based on mid-infrared (MIR) properties or maser associations. H_2_O masers and warm dense gas, as indicated by emission in the higher-excitation NH_3_ transitions, are most frequently detected toward EGOs also associated with both Class I and II CH_3_OH masers. Ninety-five percent (81%) of such EGOs are detected in H_2_O (NH_3_(3,3)), compared to only 33% (7%) of EGOs without either CH_3_OH maser type. As populations, EGOs associated with Class I and/or II CH_3_OH masers have significantly higher NH_3_ line widths, column densities, and kinetic temperatures than EGOs undetected in CH_3_OH maser surveys. However, we find no evidence for statistically significant differences in H_2_O maser properties (such as maser luminosity) among any EGO subsamples. Combining our data with the 1.1mm continuum Bolocam Galactic Plane Survey, we find no correlation between isotropic H_2_O maser luminosity and clump number density. H_2_O maser luminosity is weakly correlated with clump (gas) temperature and clump mass.2013ApJ...764...61Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/764/61CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/563/A130 : GLIMPSE/BGPS 6.7GHz methanol maser survey (Sun+, 2014)J/ApJS/206/22 : Newly EGOs from GLIMPSE II survey. II. MoC (Chen+, 2013)J/ApJS/206/9 : New EGOs from Spitzer GLIMPSE II survey. I. (Chen+, 2013)J/ApJS/202/1 : 1mm spectral line survey toward GLIMPSE EGOs (He+, 2012)J/ApJ/753/50 : 6.7GHz methanol masers. I. NH_3_ lines (Pandian+, 2012)J/MNRAS/418/1689 : Red MSX water maser and ammonia emissions (Urquhart+, 2011)J/MNRAS/416/1764 : H_2_O Southern Galactic Plane Survey (HOPS) (Walsh+, 2011)J/MNRAS/416/178 : 1.2-mm dust clumps with luminous water masers (Breen+, 2011)J/ApJS/196/9 : 95GHz methanol maser survey of GLIMPSE EGOs (Chen+, 2011)J/ApJ/741/110 : The BGPS. VII. Massive star-forming regions (Dunham+, 2011)J/ApJ/731/90 : Mid-IR content of BGPS sources (Dunham+, 2011)J/ApJS/188/123 : The Bolocam Galactic Plane Survey. II. (Rosolowsky+, 2010)J/ApJ/723/1019 : Galactic SFR and gas surface densities (Heiderman+, 2010)J/ApJ/721/137 : The Bolocam Galactic Plane Survey (BGPS) (Bally+, 2010)J/ApJ/710/150 : Molecular lines in EGOs (Chen+, 2010)J/A+A/507/795 : The RMS survey: water masers of YSOs (Urquhart+, 2009)J/ApJ/707/283 : VLA observation of molecular clumps (Johnston+, 2009)J/ApJ/702/1615 : CH_3_OH maser survey of EGOs (Cyganowski+, 2009)J/ApJS/175/509 : Ammonia spectral atlas in Perseus (Rosolowsky+, 2008)J/AJ/136/2391 : GLIMPSE Extended Green Objects catalog (Cyganowski+, 2008)J/ApJ/651/L125 : Water masers associated with IRDC cores (Wang+, 2006)J/ApJ/641/389 : Millimetric observations of IRDC cores (Rathborne+, 2006)J/A+A/434/613 : H2O maser survey of methanol maser sources (Szymczak+, 2005)J/MNRAS/363/405 : SIMBA observations of cold cores (Hill+, 2005)J/ApJS/155/149 : CH_3_OH 7_0_-6_1_ A^+^ maser sources (Kurtz+, 2004)J/A+A/403/1095 : 6.7GHz methanol masers survey of YSOs (Minier+, 2003)J/A+AS/137/43 : OH/H2O masers database (Forster+, 1999)J/A+AS/120/283 : Water maser in ultracompact HII regions (Hofner+ 1996)J/ApJ/463/205 : CS and NH3 Survey of H2O Maser Emission (Anglada+ 1996)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/764/61https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/764/61http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/764/61https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/764/61https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/764/61http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/764/61GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/764/61/ego (EGO sample: NH_3_ properties and properties from the literature)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/764/61/ego?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/764/61/ego?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/764/61/ego?GETtext/xml+votable180.050000true272.205417-20.0991670.0055555555555555565/7377 6/14337 14341 14354 14355 14402 29091 29094 29097 29100 29101 29103 29113 29461 29505 29507 29528 29529 29532 29535 30218 30219 30245 30256 30259 30260 30318 30319 30330 30405 30420 30422 30423 30594 30595 30616 30618 30622 30644 30692 30694 30695 30701 30719 320851.8058623843283312e-22 1.8058623843283312e-22https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/764/61?format=asciiInfraredRadiodefaultJ/ApJ/764/61/table4NH_3_ properties: two component fitsTex[2/62] Excitation temperatureKphys.atmol.excitationfloate_Tex[0/0.8] Uncertainty in Tex (1)Kstat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEGOSource Namemeta.id;meta.maincharTkin[4.2/68] Kinetic temperatureKphys.temperaturefloate_Tkin[0.2/13] Uncertainty in TkinKstat.errorfloatVLSR[12/114] Local Standard of Rest Velocitykm/sphys.veloc;pos.lsrfloate_VLSR[0.01/0.2] Uncertainty in VLSRkm/sstat.error;phys.veloc;pos.lsrfloatsigma[0.4/4] Gaussian line widthkm/sspect.line.widthfloate_sigma[0.01/0.3] Uncertainty in sigmakm/sstat.errorfloatN(NH3)[1.4/79] Column density of NH_3_1e+14cm**-2phys.columnDensityfloate_N(NH3)[0.1/10] Uncertainty in N(NH3)1e+14cm**-2stat.errorfloatJ/ApJ/764/61/table8Properties of associated BGPS dust clumpsBGPSIAU name of the BGPS ((Rosolowsky et al. 2010, J/ApJS/188/123)meta.id.assoccharl_RLimit flag on PRadmeta.code.errorcharRPhysical radiuspcphys.size.radiusfloatl_M(1)Limit flag on M(1) (3)meta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEGOSource namemeta.id;meta.maincharBseq[1474/6472] BGPS catalog identifier (1)meta.id.associntS1.1[0.3/79] BGPS 1.1mm source flux density (2)Jyphot.flux.density;em.mm.200-400GHzfloate_S1.1[0.1/5] Uncertainty in S1.1Jystat.errorfloatDist[0.5/13] Distance (G2)kpcpos.distance;pos.heliocentricfloatE_DistUpper uncertainty in Distkpcstat.error;stat.maxfloate_DistLower uncertainty in Distkpcstat.errorfloatn_DistNote on distance (G1)meta.notecharl_RadLimit flag on Radmeta.code.errorcharRadAngular radiusarcsecphys.angSizefloatM(1)[6/11740]? Clump mass if single component (3)solMassphys.massintnullableE_M(1)? Upper uncertainty in M(1) (3)solMassstat.error;stat.maxintnullablee_M(1)? Lower uncertainty in M(1) (3)solMassstat.errorintnullablel_nH2(1)Limit flag on nH2(1) (3)meta.code.errorcharnH2(1)? Log H2 density, one component NH3 Tkin (3)log(cm**-3)phys.densityfloatnullablef_nH2(1)Flag on 1ClognH2 (4)meta.codecharE_nH2(1)? Upper uncertainty in 1ClognH2 (3)log(cm**-3)stat.error;stat.maxfloatnullablee_nH2(1)? Lower uncertainty in 1ClognH2 (3)log(cm**-3)stat.errorfloatnullableM(2)[361/14275]? Clump mass, two components (5)solMassphys.massintnullablenH2(2)? Log H2 density, 2 component NH_3_ Tkin (5)log(cm**-3)phys.densityfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/764/61/egoEGO sample: NH_3_ properties and properties from the literatureEGOSource namemeta.id;meta.maincharprimaryf_TkinFlag on Tkin (6)meta.codecharn_DistNote on distance (G1)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_EGO[j] No NH_3_(2,2) (3)meta.codecharVLSR[-4/114]? Local Standard of Rest Velocitykm/sphys.veloc;pos.lsrfloatnullablee_VLSR[0.01/0.2]? Uncertainty in VLSRkm/sstat.error;phys.veloc;pos.lsrfloatnullablesigma[0.2/2.2]? Gaussian line widthkm/sspect.line.widthfloatnullablee_sigma? Uncertainty in sigmakm/sstat.errorfloatnullableDist[0.5/13] Distance (G2)kpcpos.distance;pos.heliocentricfloatE_DistUpper uncertainty in Distkpcstat.error;stat.maxfloate_DistLower uncertainty in Distkpcstat.errorfloatl_Tmb11The 4{sigma} upper limit flag on Tmb11meta.code.errorcharTmb11[0.1/3.1] Peak temperature of NH_3_(1,1) lineKspect.line.intensity;stat.maxfloate_Tmb11? The 1{sigma} rms uncertainty in Tmb11Kstat.errorfloatnullabletau11? Optical depth of NH_3_(1,1) linephys.absorption.opticalDepthfloatnullableN(NH3)[0.1/34]? Column density of NH_3_1e+14cm**-2phys.columnDensityfloatnullablee_N(NH3)? Uncertainty in N(NH3) (4)1e+14cm**-2stat.errorfloatnullableeta[0/1]? Beam filling factor {eta}arith.factor;stat.filling;instr.beamfloatnullablel_etaLimit flag on e_etameta.code.error;phys.electron.degenchare_eta? Uncertainty in eta (4)stat.error;phys.electron.degenfloatnullableTex? Excitation temperatureKphys.atmol.excitationfloatnullablee_Tex? Uncertainty in Tex (4)Kstat.errorfloatnullablel_TkinLimit flag on Tkin (5)meta.code.errorcharTkin? Kinetic temperatureKphys.temperaturefloatnullablee_Tkin? Uncertainty in Tkin (4)Kstat.errorfloatnullablel_Tmb22The 4{sigma} upper limit flag on Tmb22meta.code.errorcharTmb22[0.1/2.3] Peak temperature of NH_3_(2,2) lineKspect.line.intensity;stat.maxfloate_Tmb22? The 1{sigma} rms uncertainty in Tmb22Kstat.errorfloatnullablel_Tmb33The 4{sigma} upper limit flag on Tmb33meta.code.errorcharTmb33[0.1/2.1] Peak temperature of NH_3_(3,3) lineKspect.line.intensity;stat.maxfloate_Tmb33? The 1{sigma} rms uncertainty in Tmb33Kstat.errorfloatnullableC2[NY] Two components? (7)meta.codecharH2O[NY] Water maser?meta.codecharClumpSimbad column added by the CDSmeta.ref.urlintnullableRAJ2000Hour of Right Ascension (J2000) (1)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000) (1)pos.eq.dec;meta.mainC08[1/5] Table number from C08 EGO Catalog (1)meta.idintIRDC?[NY] In the IRDC? (IR dark cloud) (1)meta.codecharClII[NY-] CH_3_OH class II maser? (2)meta.codecharClI[NY] CH_3_OH class I maser? (2)meta.codecharECatLink to data from He et al. 2012 (J/ApJS/202/1) and Chens et al, 2011 (J/ApJS/196/9)meta.numberintnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/ApJ/764/61/table6H_2_O maser properties: detectionssigma[0.05/0.2] RMS in observed spectrumJystat.stdev;phot.flux.densityfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEGOSource namemeta.id;meta.maincharVmin[-183/93] Minimum velocity of maser emissionkm/sphys.velocfloatVmax[-26/132] Maximum velocity of maser emissionkm/sphys.velocfloatVpeak[-29/111] Velocity of peak maser emissionkm/sphys.veloc;phys.emissMeasure;stat.maxfloatDelVRange in maser emission velocitykm/sinstr.bandwidthfloatVNH3[8/114]? NH_3_ velocitykm/sspect.dopplerVelocfloatnullableSpeak[0.2/812] Peak maser flux densityJyphot.fluxfloatSint[0.1/2696] Integrated maser flux densityJy.km/sphot.fluxdoubleLisoIsotropic maser luminositysolLumphys.luminositydoubleNoteSource note (1)meta.notechar