J/ApJ/653/1226ivo://CDS.VizieR/J/ApJ/653/1226doi:10.26093/cds/vizier.16531226CDSQuireza C.Rood R.T.Bania T.M.Balser D.S.Maciel W.J.2017-09-29T09:02:26Z2011-05-31T14:42:34ZCDS support team

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

cds-question@unistra.frh-ii-regionschemical-abundancesWe derive the electron temperature gradient in the Galactic disk, using a sample of HII regions that spans Galactocentric distances of 0-17kpc. The electron temperature was calculated using high-precision radio recombination line and continuum observations for more than 100 HII regions. Nebular Galactocentric distances were calculated in a consistent manner, using the radial velocities measured by our radio recombination line survey. The large number of nebulae widely distributed over the Galactic disk, together with the uniformity of our data, provide a secure estimate of the present electron temperature gradient in the Milky Way.2006ApJ...653.1226Qhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/653/1226CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/165/338 : Radio recombination lines in HII regions (Quireza+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/653/1226https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/653/1226http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/653/1226https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/653/1226https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/653/1226http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/653/1226GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/653/1226/table1 (Physical properties of Galactic HII regions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/653/1226/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/653/1226/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/653/1226/table1?GETtext/xml+votable180.050000true266.45-28.250.0055555555555555566/1330 1781 1848 1930 3649 3755 14255 14263 14307 14311 14317 14359 14409 14621 14624 14644 14691 14704 15458 20849 21439 21458 21550 21646 21679 22249 23645 23982 24554 28830 28831 28875 28890 28912 28918 29091 29101 29114 29115 29116 29118 29463 29505 29508 29510 29515 29522 29533 29535 30218 30241 30259 30262 30312 30318 30328 30341 30618 30624 30644 30645 30694 30695 39804 42391 42395 42396 42398 42435 42436 42445 42449 42451 42455 42456 42460 424625.6984200832293834e-24 5.6984200832293834e-24https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/653/1226?format=asciiOpticaldefaultJ/ApJ/653/1226/table1Physical properties of Galactic HII regionsNameOther namemeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSourceSource designation (GLLL.ll+BBB.bb)meta.id;meta.maincharn_Source[d,e ] Observational notes (1)meta.notecharRGalGalactocentric distancekpcpos.distance;pos.galactocentricfloatdSun? Heliocentric distancekpcpos.distance;pos.heliocentricfloatnullabletheta? Angular diameterarcminphys.angSizefloatnullableDiam? Linear diameterpcphys.angSizefloatnullableHe+/H+Ionic abundance ratio N(He^+^)/N(H^+^)phys.abundfloate_He+/H+rms uncertainty on He+/H+stat.error;phys.abund.YfloatSnu? Flux density at 8.6GHzJyphot.flux.density;em.radio.6-12GHzfloatnullableTBC? Continuum brightness TemperatureKphys.temperature;spect.continuumfloatnullablene? Electron densitycm**-3phys.density;phys.electronfloatnullableTe? Electron temperature (2)Kphys.temperature.electron;phys.electronintnullablee_Te? rms uncertainty on TeKstat.errorintnullableModeContinuum observing mode (3)meta.codecharQc[A-E] Continuum quality factors (4)meta.code.qualcharQl[A-E] Line quality factors (4)meta.code.qualcharSurveySurvey (CII or ^3^He)meta.idSimbadNameSimbad column added by the CDSmeta.idchar_RAPosition, either from Simbad, or derived from the galactic position of the source (right ascension part)degpos.eq.ra;meta.main_DEPosition, either from Simbad, or derived from the galactic position of the source (declination part)degpos.eq.dec;meta.main