J/MNRAS/539/3105ivo://CDS.VizieR/J/MNRAS/539/3105doi:10.26093/cds/vizier/bg-gv-311CDSUrquhart J.S.Konig C.Colombo D.Karska A.Giannetti A.Moore T.J.T.,Yang A.Y.Wyrowski F.Sun Y.Jiang Z.Neralwar K.R.Eden D.,Grozdanova I.Neupane S.Figueira M.Dann E.Veena V.S.Kim W.-J.,Leurini S.Brand J.Lee M.-Y.2026-08-03T07:33:21Z2025-12-08T16:26:19ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyinfrared-sourcesco-line-emissionThe Outer Galaxy High-Resolution Survey (OGHReS) covers 100 square degrees (180{deg}<l<280{deg}) in the (2-1) transitions of three CO-isotopologues. We use the spectra to refine the velocities and physical properties to 6706 Hi-GAL clumps located in the OGHReS region. In a previous paper, we analysed 3584 clumps between l=250{deg} and 280{deg}. Here, we cover a further 3122 clumps (180{deg}<l<250{deg}) and determine reliable velocities for 2781 of these, finding good agreement with the previously assigned velocities (~80 per cent within 5km/s). We update velocities for 288 clumps and provide new values for an additional 411. Combining these with the previous results, we have velocities and physical properties for 6193 clumps (92.3 per cent). The 422 non-detections are low surface density clumps or likely contamination by evolved stars and galaxies. Key findings: (i) improved correlation between clumps and spiral arm loci and the discovery of clumps beyond the outer arm supports the existence of a new spiral structure; (ii) decreasing trend in the $L/M$-ratio consistent with less high-mass star formation in the outer Galaxy; (iii) increase in the star formation fraction in the outer Galaxy, suggesting that more clumps are forming stars despite their lower mass; (iv) discrepancies in velocity assignments across different surveys that could affect ~10000 clumps, especially in the fourth quadrant.2025MNRAS.539.3105Uhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/539/3105CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/591/A149 : Hi-GAL. inner Milky Way: +68>=l>=70 (Molinari+, 2016)J/MNRAS/471/100 : Hi-GAL compact source catalog. -71.0<l<67.0 (Elia+, 2017)J/A+A/646/A74 : Distance of HiGAL sources (Mege+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/539/3105https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/539/3105http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/539/3105https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/539/3105https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/539/3105http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/539/3105GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/539/3105/table1 (Summary of velocity allocation analysis)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/539/3105/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/539/3105/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/539/3105/table1?GETtext/xml+votable180.050000true138.156023-50.8976610.0055555555555555565/5411 5508 5552 5561 5910 5919 5992 6081 6083 9428 9430 9436 9809 9811 9817 9819 9841 9843 9849 9851 9937 9950 9972 9983 6/20820-20821 20823 20829 20831 21506 21512 21514 21536 21538-21539 21544-21545 21547 21550 21633 21635-21636 21638-21639 21668-21669 21671 21677 21679 21682 21688 21690 22038 22041 22043-22044 22046 22068 22070-22071 22077 22079 22122 22165 22216-22217 22219 22241 22252-22253 22255 22266 23621 23632 23634 23665 23667-23668 23670 23673 23764-23765 23767 23773 23775 23936 23938 23944 23946-23947 23977 23979-23980 23982 24321 24357 24359 24365 24367 24370 24376 24378 24453 24464 24466-24467 37371 37716 37741 37743 37752-37754 37829 37831 37837 37839-37840 37842 37848 37850 37861 37863 37869-37872 37874 37880 39757 39759 39762 39768 39770 39783 39789 39792 39794 39896-39897 39899 39902 39921 39923-39924 39926 39929https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/539/3105?format=asciiInfraredRadiodefaultJ/MNRAS/539/3105/table1Summary of velocity allocation analysisrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint_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.raindexed_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.decindexedupdateindicates updated clump parameters in table 2meta.ref.urlcharplotspectrameta.ref.urlcharHiGALHiGAL clump name (HIGALBMLLL.llll+B.bbbb)meta.id;meta.maincharprimaryGLONGalactic longitude of clumpdegpos.galactic.lonGLATGalactic latitude of clumpdegpos.galactic.latRelHiGAL reliability flagmeta.codechar12cmrmsSpectral noise of ^12^CO transitionKinstr.det.noise;phys.atmol.transitionfloatupVLSROGHReS assigned velocity (-9999 = non-detection, -999 = detection but vlsr ambiguous)km/sphys.veloc;pos.lsrfloatprevVLSR? HiGAL assigned velocitykm/sphys.veloc;pos.lsrfloatnullableDVLSR? Difference between HiGAL and OGHReS assigned velocitieskm/sphys.veloc;arith.difffloatnullableMethodMethod used to allocate the velocity to each clumpmeta.notecharJ/MNRAS/539/3105/table2Updated HiGAL clump parametersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHiGALHiGAL clump name (HIGALBMLLL.llll+B.bbbb)meta.id;meta.maincharRelHiGAL reliability flagmeta.codecharEvolFlag[0/2]? Updated HiGAL evolution flag (unbound = 0, bound = 1, protostellar = 2)meta.codeintnullableVLSROGHReS assigned velocitydegphys.velocfloatDist? Heliocentric distancekpcpos.distancefloatnullableRGC? Galactocentric distancekpcpos.distance;pos.galactocentricfloatnullableg2dratioGas to dust ratiophys.mass;arith.ratiocharDiam? Diameter of clumppcpos.distancefloatnullablelogMass? Log of the clump mass in solar unitslog(solMass)phys.massfloatnullableSurfDens? Surface density in units of g/cm^2g.cm**-2phot.flux.density.sb;arith.ratiodoublenullablelogLum? Log of the bolometric luminosity of the clump in solar unitslog(solLum)phys.luminosityfloatnullablelog(L/M)? Log of the L/M ratiophys.composition.massLightRatiofloatnullableDistRelDistance reliability flag (high = uncertainty within factor of 2)meta.codechar