J/ApJ/774/117ivo://CDS.VizieR/J/ApJ/774/117doi:10.26093/cds/vizier.17740117CDSJones C.Dickey J.M.Dawson J.R.McClure-Griffiths N.M.Anderson L.D.,Bania T.M.2018-05-29T17:24:29Z2015-03-27T12:46:23ZCDS support team

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

cds-question@unistra.frh-ii-regionsradio-continuum-emissionstellar-distanceWe make a comprehensive study of H I absorption toward H II regions located within |l|<10{deg}. Structures in the extreme inner Galaxy are traced using the longitude-velocity space distribution of this absorption. We find significant H I absorption associated with the Near and Far 3kpc Arms, the Connecting Arm, Bania's Clump 1, and the HI Tilted Disk. We also constrain the line-of-sight distances to H II regions, by using H I absorption spectra together with the H II region velocities measured by radio recombination lines.2013ApJ...774..117Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/774/117CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/96 : 6-GHz methanol multibeam maser catalogue (Caswell+, 2010-12)VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)VIII/58 : A Survey of Radio H II Regions in the Northern Sky (Lockman+ 1989)J/ApJ/764/34 : HRDS IV. H, He & C radio recombination lines (Wenger+, 2013)J/MNRAS/420/1656 : RMS compact HII regions distances (Urquhart+, 2012)J/ApJ/754/62 : HRDS III. HII region kinematic distances (Anderson+, 2012)J/ApJ/753/62 : Kinematic distance ambiguity in HII regions (Jones+, 2012)J/MNRAS/420/1656 : RMS compact HII regions distances (Urquhart+, 2012)J/ApJS/194/32 : The HII Region Discovery Survey (HRDS) II. (Anderson+, 2011)J/MNRAS/411/705 : Spectrophotometric distances of HII regions (Moises+, 2011)J/ApJ/690/706 : Distances of Galactic HII regions (Anderson+, 2009)J/ApJ/653/1226 : Physical properties of galactic HII regions (Quireza+, 2006)J/ApJS/165/338 : Radio recombination lines in HII regions (Quireza+, 2006)J/ApJS/154/553 : Inner galaxy massive star formation regions (Sewilo+, 2004)J/ApJ/582/756 : Velocities of HII regions (Kolpak+, 2003)J/A+A/397/213 : Galactic HII regions (Paladini+, 2003)J/A+A/275/67 : Velocity Field of the outer Galaxy (Brand+ 1993)J/A+A/171/261 : RRLs of Southern HII Regions (Caswell+ 1987)J/A+AS/52/63 : H I Survey of the Galactic Center Region (Burton+ 1983)http://www.cv.nrao.edu/hrds/ : GBT HRDS home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/774/117https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/774/117http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/774/117https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/774/117https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/774/117http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/774/117GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/774/117/table2 (Presence of significant HI absorption in Extreme Inner Galaxy (EIG) features for each HII region)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/774/117/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/774/117/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/774/117/table2?GETtext/xml+votable180.050000true259.42601-37.059750.0055555555555555565/7206 7207 7229 6/28803 28808 28809 28811 28812 28813 28814 28852 28874 28875 28878 28896 28897 28900 28901 28912 28913 28915 29090 29096 42445 42447 42450 42451 42454 42455 42456 42457 42458 42460 42461 42462https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/774/117?format=asciiRadiodefaultJ/ApJ/774/117/table2Presence of significant HI absorption in Extreme Inner Galaxy (EIG) features for each HII regionN3[NY] Near 3kpc arm?meta.codecharCA[NY] Connecting arm?meta.codecharTD[NY] HI Tilted Disk?meta.codecharF3[NY] Far 3kpc arm?meta.codecharE135[NY] +135km/s expanding arm?meta.codecharBC1[NY] Bania's clump 1?meta.codechar_GlonPositions from names (longitude part)degpos.galactic.lonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDmeta.ref.urlcharVrrlNumber of RRL velocities associatedmeta.numberintnullableNameRegion identifier (GLLL.lll+BB.bbb)meta.id;meta.maincharprimaryGCatSources within 2.5" from Green Bank Telescope catalogs: Quireza+, 2006, J/ApJS/165/338; Anderson+, 2011, J/ApJS/194/32 and Wenger+, 2013, J/ApJ/764/34meta.ref.urlintnullable_GlatPositions from names (latitude part)degpos.galactic.lat_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedJ/ApJ/774/117/table3HII regions with Radio-Recombinatio Lines (RRL) velocity associated (in longitude-velocity space) with known EIG structure(s)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintComp"S"ingle or "M"ultiple RRL velocity component HII regionsmeta.codecharNameRegion identifier (GLLL.lll+BB.bbb) (1) \linkRole{EIG features (table 2)}meta.id;obs.fieldcharm_Name[a-d] Component IDmeta.code.multipcharVrrl[-215.6/152] Velocity from radio recombination lines (V_RRL_)km/sspect.dopplerVelocfloatr_Vrrl[1/5] Reference (G1)meta.ref;pos.frameintAssocAssociationmeta.notecharJ/ApJ/774/117/table4HII regions with calculated kinematic distancesu_Dlos[*] Large error (3)meta.code.errorchare_Dlos[1.4/9]? Dlos uncertaintykpcstat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKDAR[FN] Kinematic Distance Ambiguity Resolution: Far (within rotation model boundaries) or Nearmeta.codecharNameRegion identifier (GLLL.lll+BB.bbb) (1) \linkRole{EIG features (table 2)}meta.id;obs.fieldcharVrrl[-24/50] Velocity from radio recombination lines (V_RRL_)km/sspect.dopplerVelocfloatr_Vrrl[1/6] Reference (G1)meta.ref;pos.frameintQ[A-C] Kinematic distance quality (2)meta.code.qual;pos.distancecharRgal[3/17] Galactocentric radiuskpcpos.distance;pos.galactocentricfloatDlos[0.3/25] Kinematic distancekpcpos.distance;pos.heliocentricfloat