J/ApJ/854/170ivo://CDS.VizieR/J/ApJ/854/170doi:10.26093/cds/vizier.18540170CDSHunter T.R.Brogan C.L.MacLeod G.C.Cyganowski C.J.Chibueze J.O.,Friesen R.Hirota T.Smits D.P.Chandler C.J.Indebetouw R.2019-01-22T13:40:17Z2019-01-03T09:26:49ZCDS support team

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

cds-question@unistra.frastrophysical-masersradio-astronomyinterstellar-mediumradio-continuum-emissionWe report the first sub-arcsecond VLA imaging of 6GHz continuum, methanol maser, and excited-state hydroxyl maser emission toward the massive protostellar cluster NGC 6334I following the recent 2015 outburst in (sub)millimeter continuum toward MM1, the strongest (sub)millimeter source in the protocluster. In addition to detections toward the previously known 6.7GHz Class II methanol maser sites in the hot core MM2 and the UCHII region MM3 (NGC 6334F), we find new maser features toward several components of MM1, along with weaker features ~1" north, west, and southwest of MM1, and toward the nonthermal radio continuum source CM2. None of these areas have heretofore exhibited Class II methanol maser emission in three decades of observations. The strongest MM1 masers trace a dust cavity, while no masers are seen toward the strongest dust sources MM1A, 1B, and 1D. The locations of the masers are consistent with a combination of increased radiative pumping due to elevated dust grain temperature following the outburst, the presence of infrared photon propagation cavities, and the presence of high methanol column densities as indicated by ALMA images of thermal transitions. The nonthermal radio emission source CM2 (2" north of MM1) also exhibits new maser emission from the excited 6.035 and 6.030GHz OH lines. Using the Zeeman effect, we measure a line-of-sight magnetic field of +0.5 to +3.7mG toward CM2. In agreement with previous studies, we also detect numerous methanol and excited OH maser spots toward the UCHII region MM3, with predominantly negative line-of-sight magnetic field strengths of -2 to -5mG and an intriguing south-north field reversal.2018ApJ...854..170Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/854/170CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/316 : UKIDSS-DR6 Galactic Plane Survey (Lucas+ 2012)J/A+A/316/102 : JHK Photometry in NGC 6334 (Tapia+, 1996)J/MNRAS/301/640 : Ultracompact H II regions studies. II. (Walsh+, 1998)J/A+A/466/989 : Hot ammonia from NGC 6334I and NGC 6334I(N) (Beuther+, 2007)J/ApJ/668/331 : OH masers in W3(OH) (Fish+, 2007)J/A+A/481/169 : ATCA 3mm obs. of NGC 6334I and NGC 6334I(N) (Beuther+, 2008)J/ApJ/702/1615 : CH_3_OH maser survey of EGOs (Cyganowski+, 2009)J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)J/ApJ/767/36 : APEX observations of HOPS protostars (Stutz+, 2013)J/MNRAS/431/1752 : ATLASGAL 6.7GHz methanol masers (Urquhart+, 2013)J/ApJ/778/96 : Spitzer and NEWFIRM observations of NGC 6334 (Willis+, 2013)J/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014)J/ApJ/832/187 : ALMA & VLA radio continuum obs. of NGC 6334I (Brogan+, 2016)J/MNRAS/465/3011 : VVV high amplitude NIR var. stars (Contreras Pena+, 2017)J/ApJ/851/L46 : CH_3_OCH_2_OH ALMA detection in NGC 6334I (McGuire+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/854/170https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/854/170http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/854/170https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/854/170https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/854/170http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/854/170GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/854/170/table2 (Fitted properties of the 6.7GHz methanol masers)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/854/170/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/854/170/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/854/170/table2?GETtext/xml+votable180.050000true260.222387222-35.7837427780.005555555555555556Cone search capability for table J/ApJ/854/170/table3 (Summary of 6.7GHz methanol maser associations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/854/170/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/854/170/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/854/170/table3?GETtext/xml+votable180.050000true260.22242083-35.782133330.005555555555555556Cone search capability for table J/ApJ/854/170/ohmasers (Fitted properties of the OH 6.030GHz and 6.035GHz masers (left and right circular polarization; tables 4-7))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/854/170/ohmasers?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/854/170/ohmasers?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/854/170/ohmasers?GETtext/xml+votable180.050000true260.2223825-35.7837702780.0055555555555555566/424564.439466485724119e-24 4.439466485724119e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/854/170?format=asciiRadiodefaultJ/ApJ/854/170/table2Fitted properties of the 6.7GHz methanol masersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/647] Internal index number (1)meta.id;meta.mainintAssocAssociationmeta.id.assoccharVChan[-19/-1.5] Velocity channelkm/sphys.velocfloatRAJ2000[17] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[35] Degree of Declination (J2000)pos.eq.dec;meta.mainFlux[0.006/1820] Flux densityJyphot.flux.density;em.radio.6-12GHzdoublee_Flux[0.001/1] Uncertainty in Flux (2)Jystat.error;phot.fluxdoubleJ/ApJ/854/170/table3Summary of 6.7GHz methanol maser associationsSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintAssocAssociation identification (and total)meta.id.assoc;meta.maincharprimaryRAJ2000[17]? Hour of right ascension (J2000)pos.eq.ra;meta.mainnullableDEJ2000[35]? Degree of declination (J2000)pos.eq.dec;meta.mainnullableFlux[0.09/3420] 6.7GHz integrated fluxJy.km/sphot.flux.density;em.radio.6-12GHzdoubleVelmin[-18.8/-4.5] Minimum velocitykm/sphys.veloc;stat.minfloatVelpk[-11.2/-3.5] Peak velocitykm/sphys.veloc;stat.maxfloatVelmax[-9.1/-1.5] Maximum velocitykm/sphys.veloc;stat.maxfloatFluxPk[0.1/1820]? 6.7GHz peak flux densityJyphot.flux.density;em.radio.6-12GHzdoublenullableTB[0.01/307]? Lower limit to the brightness temperature T_B_ (1)1e+06Kphys.temperature;stat.mindoublenullableNmNumber of fitted methanol maser for this association (link to table 2)meta.numberintnullableJ/ApJ/854/170/ohmasersFitted properties of the OH 6.030GHz and 6.035GHz masers (left and right circular polarization; tables 4-7)AssocAssociationmeta.id.assoccharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFreqmaser lineGHzem.freqcharSeq[1/647] Internal index number (1)meta.id;meta.mainintPoll=left circular polarization or r=right circular polarizationmeta.codecharVChan[-19/-1.5] Velocity channelkm/sphys.velocfloatRAJ2000[17] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[35] Degree of Declination (J2000)pos.eq.dec;meta.mainFlux[0.006/1820] Flux densityJyphot.flux.density;em.radio.6-12GHzdoublee_Flux[0.001/1] Uncertainty in Flux (2)Jystat.error;phot.fluxdouble