J/other/PASA/33.ivo://CDS.VizieR/J/other/PASA/33.20doi:10.26093/cds/vizier/ds/ddkcaCDSHindson L.Johnston-Hollitt M.Hurley-Walker N.Callingham J.R.Su H.,Morgan J.Bell M.Bernardi G.Bowman J.D.Briggs F.Cappallo R.J.,Deshpande A.A.Dwarakanath K.S.For B.-QGaensler B.M.Greenhill L.J.,Hancock P.Hazelton B.J.Kapin A.D.Kaplan D.L.Lenc E.Lonsdale C.J.,Mckinley B.McWhirter S.R.Mitchell D.A.Morales M.F.Morgan E.,Oberoi D.Offringa A.Ord S.M.Procopio P.Prabu T.Udaya Shankar N.,Srivani K.S.Staveley-Smith L.Subrahmanyan R.Tingay S.J.Wayth R.B.,Webster R.L.Williams A.Williams C.L.Wu C.Zheng Q.2026-03-17T20:08:27Z2016-06-06T09:07:52ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyh-ii-regionsradio-continuum-emissionWe have compiled a catalogue of HII regions detected with the Murchison Widefield Array between 72 and 231MHz. The multiple frequency bands provided by the Murchison Widefield Array allow us identify the characteristic spectrum generated by the thermal Bremsstrahlung process in HII regions. We detect 306 HII regions between 260{deg}<l<340{deg} and report on the positions, sizes, peak, integrated flux density, and spectral indices of these HII regions. By identifying the point at which HII regions transition from the optically thin to thick regime, we derive the physical properties including the electron density, ionised gas mass, and ionising photon flux, towards 61 HII regions. This catalogue of HII regions represents the most extensive and uniform low frequency survey of HII regions in the Galaxy to date.2016PASA...33...20Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/PASA/33.20CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/PASA/33.20https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/PASA/33.20http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/PASA/33.20https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/PASA/33.20https://vizier.iucaa.in/viz-bin/votable?-source=J/other/PASA/33.20http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/PASA/33.20GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap5.830941190275486e-26 9.276497240453405e-25RadiodefaultJ/other/PASA/33.20/mwahiiMWA HII regions (table 2)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource Name, GLLL.II+BB.bb, peak locationmeta.id;stat.maxcharGLONRight ascension (Galactic), ellipse centredegpos.galactic.lonGLATDeclination (Galactic), ellipse centredegpos.galactic.latfloatPAPosition angledegpos.posAngfloatLxEllipse major axisdegphys.angSize;pos.errorEllipsefloatLyEllipse minor axisdegphys.angSize;pos.errorEllipsefloatSp88Peak flux at 88MHz in Jy/BeamJyphot.flux.density;em.radio.20-100MHzfloate_Sp88Error on peak flux at 88MHz in Jy/BeamJystat.errorfloatSp118Peak flux at 118MHz in Jy/BeamJyphot.flux.density;em.radio.100-200MHzfloate_Sp118Error on peak flux at 118MHz in Jy/BeamJystat.errorfloatSp154Peak flux at 154MHz in Jy/BeamJyphot.flux.density;em.radio.100-200MHzfloate_Sp154Error on peak flux at 154MHz in Jy/BeamJystat.errorfloatSp185Peak flux at 185MHz in Jy/BeamJyphot.flux.density;em.radio.100-200MHzfloate_Sp185Error on peak flux at 185MHz in Jy/BeamJystat.errorfloatSp216Peak flux at 216MHz in Jy/BeamJyphot.flux.density;em.radio.200-400MHzfloate_Sp216Error on peak flux at 216MHz in Jy/BeamJystat.errorfloatSi88Integrated flux at 88MHzJyphot.flux.density;em.radio.20-100MHzfloate_Si88Error on Integrated flux at 88MHzJystat.errorfloatSi118Integrated flux at 118MHzJyphot.flux.density;em.radio.100-200MHzfloate_Si118Error on Integrated flux at 118MHzJystat.errorfloatSi154Integrated flux at 154MHzJyphot.flux.density;em.radio.100-200MHzfloate_Si154Error on Integrated flux at 154MHzJystat.errorfloatSi185Integrated flux at 185MHzJyphot.flux.density;em.radio.100-200MHzfloate_Si185Error on Integrated flux at 185MHzJystat.errorfloatSi216Integrated flux at 216MHzJyphot.flux.density;em.radio.200-400MHzfloate_Si216Error on Integrated flux at 216MHzJystat.errorfloatSi843? Integrated flux at 843MHzJyphot.flux.density;em.radio.750-1500MHzfloatnullablee_Si843? Error on Integrated flux at 843MHzJystat.errorfloatnullableSi1400? Integrated flux at 1400MHzJyphot.flux.density;em.radio.750-1500MHzfloatnullablee_Si1400? Error on Integrated flux at 1400MHzJystat.errorfloatnullableSp+Index? Spectral index alpha, S_{nu}_=a*{nu}^{alpha}^spect.indexfloatnullablee_Sp+Index? Error on spectral indexstat.errorfloatnullable