J/AJ/132/242ivo://CDS.VizieR/J/AJ/132/242doi:10.26093/cds/vizier.51320242CDSNord M.E.Henning P.A.Rand R.J.Lazio T.J.W.Kassim N.E.2019-03-05T10:48:01Z2007-10-27T16:21:04ZCDS support team

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

cds-question@unistra.frh-ii-regionseffective-temperatureIn this work we present 74MHz observations in the region 26{deg}>l>-15{deg}, -5{deg}<b<5{deg} report the detection of 92 absorption features associated with known HII regions; and derive the brightness temperature of the Galactic cosmic-ray electron synchrotron emission emanating from the column behind these regions. For the 42 HII regions with known distances, the average emissivity of the column behind the HII region is derived. The 74MHz emissivity values range between 0.3 and 1.0K/pc for a model assuming uniform distribution of emissivity. Methods for using this type of data to model the three-dimensional distribution of cosmic-ray emissivity and the possibility of using this method to break the HII region kinematic distance degeneracy are discussed.2006AJ....132..242Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/132/242CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/20 : Catalogue of HII Regions (Sharpless 1959)J/A+AS/131/319 : HII regions catalogue (Petit+ 1998)J/A+A/397/213 : Galactic HII regions (Paladini+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/132/242https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/132/242http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/132/242https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/132/242https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/132/242http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/132/242GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/132/242/detect (Detections in HII Regions in several fields (tables 2, 3, 4 and 5 of paper))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/132/242/detect?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/132/242/detect?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/132/242/detect?GETtext/xml+votable180.050000true275.15625-16.14750.005555555555555556Cone search capability for table J/AJ/132/242/table6 (HII region non-detections)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/132/242/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/132/242/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/132/242/table6?GETtext/xml+votable180.050000true269.14208333-25.035833330.0055555555555555565/7275 7278 7377 7383 6/28808 28810 28818 28824 28828 28829 28830 28890 28891 28897 28898 28901 28912 28913 28915 28918 28919 29090 29091 29093 29094 29095 29097 29116 29118 29119 29463 29505 29506 29512 29513 29515 29522 29523 29528 29529 30216 30218 30219 30241 42390 42391 42396 42397 42398 42435 42436 42438 42439 42440 42441 42444 42445 42447 42449 42450 42451 42455 42456 42457 42460 42461 424624.903291545219051e-26 4.903291545219051e-26https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/132/242?format=asciidefaultJ/AJ/132/242/detectDetections in HII Regions in several fields (tables 2, 3, 4 and 5 of paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[PBD2003]Paladini et al. (2003, cat. <J/A+A/397/213>) catalog numbermeta.id;meta.mainintGnameName, based on Galactic position.meta.idcharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainIntObserved intensity at 74MHz, in Jy/beam.Jyphot.flux.density;em.radio.20-100MHzfloate_Intrms uncertainty on IntJystat.errorfloatTobsSky brightness temperature derived from the measured intensity1000Kinstr.skyTempfloate_Tobsrms uncertainty on Tobs1000Kstat.errorfloatTgbIntegrated cosmic-ray electron brightness temperature of the column behind the HII region1000Kinstr.skyTempfloatn_Tgb[a] Note on Tgb (1)meta.notechare_Tgbrms uncertainty on Tgb1000Kstat.errorfloatTeElectron temperature of the HII region1000Kphys.temperature.electron;obs.field;phys.electronfloate_Terms uncertainty on Te1000Kstat.errorfloatDist? Distance from the Sun to the HII regionkpcpos.distance;pos.heliocentricfloatnullableEmi? Emissivity of the column behind the HII region using the assumptions of Sect. 5.K/pcphys.emissivityfloatnullablee_Emi? rms uncertainty on EmiK/pcstat.errorfloatnullableJ/AJ/132/242/table6HII region non-detectionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[PBD2003]Paladini et al. (2003, cat. <J/A+A/397/213>) catalog numbermeta.id;meta.mainintGnameName, based on Galactic position.meta.idcharDistGeocentric distancekpcpos.distance;pos.heliocentricfloatTe? Electron temperature (1)1000Kphys.temperature.electron;phys.electronfloatnullableTgbNondetection 3{sigma} upper limit of the integrated cosmic ray electron brightness temperature of the column behind the HII region1000Kinstr.skyTempfloat_RAPosition (from Paladini et al. 2003, Cat. J/A+A/397/213) (right ascension part)degpos.eq.ra;meta.main_DEPosition (from Paladini et al. 2003, Cat. J/A+A/397/213) (declination part)degpos.eq.dec;meta.main