J/MNRAS/420/1656ivo://CDS.VizieR/J/MNRAS/420/1656doi:10.26093/cds/vizier.74201656CDSUrquhart J.S.Hoare M.G.Lumsden S.L.Oudmaijer R.D.Moore T.J.T.,Mottram J.C.Cooper H.D.B.Mottram M.Rogers H.C.2024-07-16T20:12:32Z2014-02-23T17:17:38ZCDS support team

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

cds-question@unistra.frh-ii-regionsradio-astronomyWe present high-resolution HI data obtained using the Australia Telescope Compact Array to resolve the near/far distance ambiguities towards a sample of compact HII regions from the Red MSX Source (RMS) survey. The high-resolution data are complemented with lower resolution archival HI data extracted from the Southern and Very Large Array (VLA) Galactic Plane surveys. We resolve the distance ambiguity for nearly all of the 105 sources where the continuum was strong enough to allow analysis of the HI absorption line structure. This represents another step in the determination of distances to the total RMS sample, which with over 1000 massive young stellar objects and compact HII regions is the largest and most complete sample of its kind. The full sample will allow the distribution of massive star formation in the Galaxy to be examined.2012MNRAS.420.1656Uhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/420/1656CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)J/A+AS/115/81 : A CS(2-1) survey of UC HII regions (Bronfman+, 1996)J/A+AS/120/283 : Water maser features in UC HII regions (Hofner+ 1996)J/A+A/336/339 : VLA observations of ultracompact HII regions (Molinari+ 1998)J/MNRAS/301/640 : Ultracompact H II regions studies. II. (Walsh+, 1998)J/ApJS/138/63 : H2CO and Halpha observations of UC HII (Araya+, 2002)J/ApJ/587/714 : H2CO and Halpha observations of UC HII (Watson+, 2003)J/ApJS/155/123 : JHKs photometry of ultracompact HII regions (Alvarez+, 2004)J/A+A/417/615 : Maser and outflows in UC HII region (Codella+, 2004)J/A+A/453/1003 : SCUBA ultracompact HII regions (Thompson+, 2006)J/ApJS/91/659 : Ultracompact HII regions radio images (Kurtz+ 1994)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/420/1656https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/420/1656http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/420/1656https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/420/1656https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/420/1656http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/420/1656GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/420/1656/table3 (*Summary of measured source, tangent and absorption velocities, kinematic distances and results of our Kinematic Distance Ambiguity (KDA) analysis)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/420/1656/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/420/1656/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/420/1656/table3?GETtext/xml+votable180.050000true272.362-20.32450.005555555555555556Cone search capability for table J/MNRAS/420/1656/table1 (Summary of fields observed, synthesized beam parameters and rms of the restored images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/420/1656/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/420/1656/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/420/1656/table1?GETtext/xml+votable180.050000true149.8187917-56.9120.005555555555555556Cone search capability for table J/MNRAS/420/1656/table2 (Radio source parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/420/1656/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/420/1656/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/420/1656/table2?GETtext/xml+votable180.050000true149.81969583-56.91110.0055555555555555565/10624 6/12974 14358 14409 29091 29101 29116 29505 29510 30256 30312 30318 30594 30718 37364 37368-37369 41655 41675 41678 41682-41686 41702 41759 41763 41767 41770 41772 41776-41777 41780 41782 41805 41811-41813 41815-41816 41820 41824 42158-42159 42169-42174 42207 42210-42211 42214-42215 42224-42226 42228-42230 42382 42387 42390 42392-42393 42396-42397 42436 42438 42441-42442 42444-42445 42500 42512https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/420/1656?format=asciiRadiodefaultJ/MNRAS/420/1656/table3*Summary of measured source, tangent and absorption velocities, kinematic distances and results of our Kinematic Distance Ambiguity (KDA) analysisrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSXMSX name, GLLL.llll-BB.bbbb (Cat. V/114)meta.id;meta.maincharu_MSX[+] results obtained from low-resolution datameta.code.errorcharNsRadio observations (tables 1 and 2)meta.ref.urlintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVsSource velocity (measured Vlsr)km/sphys.velocfloatVtTangent velocity (measured Vlsr)km/sphys.veloc.transversefloatVaAbsorption velocity (measured Vlsr)km/sphys.velocfloatDnearInner Galaxy circular orbit near distance (1)kpcpos.distance;pos.heliocentricfloatDfarInner Galaxy circular orbit far distance (1)kpcpos.distance;pos.heliocentricfloatRGCDistance from the Galactic center (1)kpcpos.distancefloatKDA[fn? tp] KDA solution (2)meta.codecharDist? Distancekpcpos.distance;pos.heliocentricfloatnullablen_Dist[*] Distance from the literature (3)meta.notecharr_Dist? Reference for adopted distance value (4)meta.ref;pos.frameintnullablez? Galactic scale heightpcinstr.scale;pos.galacticfloatnullablel_logLLimit flag on logLmeta.code.errorcharlogL? Bolometric luminosity of the HII regionlog(solLum)phys.luminosityfloatnullableRefReferences (4)meta.refcharJ/MNRAS/420/1656/table1Summary of fields observed, synthesized beam parameters and rms of the restored imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSXField name, GLLL.llll-BB.bbbbmeta.id;meta.maincharn_MSX[*] no radio emission detectedmeta.notecharNsNumber of radio-sources in the field (table2) and measured parameters (table3)meta.numberintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSize1Size (Beam parameters)arcsecphys.angSizefloatSize2Size (Beam parameters)arcsecphys.angSizefloatPA[-90/90] Position angle (Beam parameters)degpos.posAngintrmsImage rmsmJystat.stdev;instr.det.noise;obs.imagefloatJ/MNRAS/420/1656/table2Radio source parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSXField name, GLLL.llll-BB.bbbbmeta.id;meta.maincharNsObservations of this source (field) in table1 (within 50'')meta.ref.urlintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainSpeakPeak HI flux densitymJyphot.fluxfloatSintIntegrated HI flux densitymJyphot.fluxfloatSize1Size (Beam parameters)arcsecphys.angSizefloatSize2Size (Beam parameters)arcsecphys.angSizefloatPA[-90/90] Position angle (Beam parameters)degpos.posAngint