J/ApJS/240/14ivo://CDS.VizieR/J/ApJS/240/14doi:10.26093/cds/vizier.22400014CDSLiu B.Anderson L.D.McIntyre T.Roshi D. A.Churchwell E.,Minchin R.Terzian Y.2019-06-24T13:14:44Z2019-05-27T14:55:29ZCDS support team

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

cds-question@unistra.frh-ii-regionsradio-astronomysurveysThe Survey of Ionized Gas of the Galaxy, Made with the Arecibo telescope (SIGGMA) provides a fully sampled view of the radio recombination line (RRL) emission from the portion of the Galactic plane visible with Arecibo. Observations use the Arecibo L-band Feed Array, which has a FWHM beam size of 3.4'. Twelve hydrogen RRLs from H163{alpha} to H174{alpha} are located within the instantaneous bandpass from 1225MHz to 1525MHz. We provide here cubes of average ("stacked") RRL emission for the inner Galaxy region 32{deg}<=l<=70{deg}, |b|<=1.5{deg}, with an angular resolution of 6'. The stacked RRL rms at 5.1km/s velocity resolution is ~0.65mJy/beam, making this the most sensitive large-scale fully sampled RRL survey extant. We use SIGGMA data to catalog 319 RRL detections in the direction of 244 known HII regions, and 108 new detections in the direction of 79 HII region candidates. We identify 11 carbon RRL emission regions, all of which are spatially coincident with known HII regions. We detect RRL emission in the direction of 14 of the 32 supernova remnants (SNRs) found in the survey area. This RRL emission frequently has the same morphology as the SNRs. The RRL velocities give kinematic distances in agreement with those found in the literature, indicating that RRLs may provide an additional tool to constrain distances to SNRs. Finally, we analyze the two bright star-forming complexes: W49 and W51. We discuss the possible origins of the RRL emission in directions of SNRs W49B and W51C.2019ApJS..240...14Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/240/14CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/64 : Westerhout's Catalogue of 82 Discrete Sources (Westerhout 1958)VIII/58 : A Survey of Radio H II Regions in the Northern Sky (Lockman+ 1989)J/A+A/171/261 : RRLs of Southern HII Regions (Caswell+ 1987)J/ApJS/165/338 : Radio recombination lines in HII regions (Quireza+, 2006)J/ApJ/694/546 : IR dust bubbles. II. YSOs model parameters (Watson+, 2009)J/ApJ/720/1055 : VBLA observations of W51 Main/South (Sato+, 2010)J/ApJS/194/32 : The HII Region Discovery Survey (HRDS). II. (Anderson+, 2011)J/ApJS/212/1 : The WISE catalog of Galactic HII regions (Anderson+, 2014)J/ApJ/783/130 : Parallaxes of high mass star forming regions (Reid+, 2014)J/MNRAS/450/2025 : HIPASS-ZoA HII regions (Alves+, 2015)J/ApJS/221/26 : Radio obs. of Galactic WISE HII regions (Anderson+, 2015)J/ApJS/234/33 : A GBT survey of large Galactic HII regions (Anderson+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/240/14https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/240/14http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/240/14https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/240/14https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/240/14http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/240/14GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/240/14/table2 (Catalog of 319 radio recombination line (RRL) detections towards 244 "known" HII regions from the WISE catalog (Anderson+, 2014, J/ApJS/212/1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/240/14/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/240/14/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/240/14/table2?GETtext/xml+votable180.050000true282.63023-0.030770.005555555555555556Cone search capability for table J/ApJS/240/14/table3 (Catalog of 108 RRL detections towards 79 "candidate" HII regions from the WISE catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/240/14/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/240/14/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/240/14/table3?GETtext/xml+votable180.050000true283.22766-0.084050.0055555555555555565/7579 7605 7651 7654 7673 7678 7679 6/12968 12970 12971 12974 12975 14337 14341 14353 14355 14357 14358 14359 14402 14403 14406 14409 14427 30312 30313 30315 30330 30331 30405 30416 30417 30425 30592 30594 30595 30600 30601 30622 30623 30628 30640 30641 30644 30645 30647 30688 30691 30701 30706 30707 30710https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/240/14?format=asciiRadiodefaultJ/ApJS/240/14/table2Catalog of 319 radio recombination line (RRL) detections towards 244 "known" HII regions from the WISE catalog (Anderson+, 2014, J/ApJS/212/1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIdentifier (GLLL.lll+BB.bbb) (G1)meta.id;meta.maincharf_Name[ab] Flag on Name (1)meta.codecharGLON[32.8/64.2] Galactic longitudedegpos.galactic.lonGLAT[-1.4/1.5] Galactic latitudedegpos.galactic.latPeak[1.9/471] Arecibo/ALFA peak fluxmJy/beamphot.flux.density;em.radio.750-1500MHzfloate_Peak[0.1/108] Uncertainty in PeakmJy/beamstat.error;stat.maxfloatVLSR[-46.1/119] Local Standard of Rest velocitykm/sphys.veloc;pos.lsrfloate_VLSR[0.1/114] Uncertainty in VLSRkm/sstat.error;phys.veloc;pos.lsrfloatFWHM[12/98] Full-Width at Half-Maximumkm/sspect.line.widthfloate_FWHM[0.3/91] Uncertainty in FWHMkm/sstat.error;phys.angSizefloatRMS[0.3/30.5] RMSmJy/beamstat.stdevfloatS/N[5/102] Signal-to-Noisestat.snrfloat_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/ApJS/240/14/table3Catalog of 108 RRL detections towards 79 "candidate" HII regions from the WISE catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameIdentifier (GLLL.lll+BB.bbb) (G1)meta.id;meta.maincharf_Name[abc] Flag on Name (1)meta.codecharGLON[33/68] Galactic longitudedegpos.galactic.lonGLAT[-1.1/1.6] Galactic latitudedegpos.galactic.latPeak[1.4/54] Arecibo/ALFA peak fluxmJy/beamphot.flux.density;em.radio.750-1500MHzfloate_Peak[0.1/10] Uncertainty in PeakmJy/beamstat.error;stat.maxfloatVLSR[-29.2/115] Local Standard of Rest velocitykm/sphys.veloc;pos.lsrfloate_VLSR[0.3/25] Uncertainty in VLSRkm/sstat.error;phys.veloc;pos.lsrfloatFWHM[12/88] Full-Width at Half-Maximumkm/sspect.line.widthfloate_FWHM[0.7/25] Uncertainty in FWHMkm/sstat.error;phys.angSizefloatRMS[0.1/4.6] RMSmJy/beamstat.stdevfloatS/N[5/51] Signal-to-Noisestat.snrfloat_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.decnullableindexed