J/MNRAS/500/3050ivo://CDS.VizieR/J/MNRAS/500/3050doi:10.26093/cds/vizier.75003050CDSUrquhart J.S.Figura C.Cross J.R.Wells M.R.A.Moore T.J.T.,Eden D.J.Ragan S.E.Pettitt A.R.Duarte-Cabral A.Colombo D.,Schuller F.Csengeri T.Mattern M.Beuther H.Menten K.M.Wyrowski F.,Anderson L.D.Barnes P.J.Beltran M.T.Billington S.J.Bronfman L.,Giannetti A.Kainulainen J.Kauffmann J.Lee M.-Y.Leurini S.,Medina S.-N.X.Montenegro-Montes F.M.Riener M.Rigby A.J.,Sanchez-Monge A.Schilke P.Schisano E.Traficante A.Wienen M.2024-08-21T20:16:48Z2022-09-30T14:40:34ZCDS support team

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

cds-question@unistra.frmilky-way-galaxymolecular-cloudsco-line-emissionradio-spectroscopyBy combining two surveys covering a large fraction of the molecular material in the Galactic disc, we investigate the role spiral arms play in the star formation process. We have matched clumps identified by APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) with their parental giant molecular clouds (GMCs) as identified by SEDIGISM, and use these GMC masses, the bolometric luminosities, and integrated clump masses obtained in a concurrent paper to estimate the dense gas fractions (DGF_gmc_={Sigma}M_clump_/M_gmc_) and the instantaneous star formation efficiencies (i.e. SFE_gmc_={Sigma}L_clump_/M_gmc_). We find that the molecular material associated with ATLASGAL clumps is concentrated in the spiral arms (~60 per cent found within +/-10km/s of an arm). We have searched for variations in the values of these physical parameters with respect to their proximity to the spiral arms, but find no evidence for any enhancement that might be attributable to the spiral arms. The combined results from a number of similar studies based on different surveys indicate that, while spiral-arm location plays a role in cloud formation and HI to H_2_ conversion, the subsequent star formation processes appear to depend more on local environment effects. This leads us to conclude that the enhanced star formation activity seen towards the spiral arms is the result of source crowding rather than the consequence of any physical process.2021MNRAS.500.3050Uhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/500/3050CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/549/A45 : ATLASGAL Compact Source Catalog: 330<l<21 (Contreras+, 2013)J/A+A/565/A75 : ATLASGAL dust condensations in Galactic planeJ/A+A/568/A41 : ATLASGAL Compact Source Catalog: 280<l<60 (Urquhart+, 2014)J/A+A/601/A124 : Clouds in SEDIGISM science demonstration fieldJ/MNRAS/473/1059 : Complete sample of Galactic clump propertieshttps://atlasgal.mpifr-bonn.mpg.de/cgi-bin/ATLASGAL_DATABASE.cgi :https://sedigism.mpifr-bonn.mpg.de/cgi-bin-seg/SEDIGISM_DATABASE.cgi :https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/500/3050https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/500/3050http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/500/3050https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/500/3050https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/500/3050http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/500/3050GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/500/3050/table1 (Fitted Gaussian parameters to CO spectra extracted towards ATLASGAL clumps)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/500/3050/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/500/3050/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/500/3050/table1?GETtext/xml+votable180.050000true266.3584083-28.90892830.005555555555555556Cone search capability for table J/MNRAS/500/3050/table2 (*Assigned velocities and derived physical parameters for the ATLASGAL clumps)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/500/3050/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/500/3050/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/500/3050/table2?GETtext/xml+votable180.050000true266.9841667-29.99433330.005555555555555556Cone search capability for table J/MNRAS/500/3050/table3 (Properties of matched SEDIGISM GMCs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/500/3050/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/500/3050/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/500/3050/table3?GETtext/xml+votable180.050000true266.829901-29.13745520.0055555555555555565/7202-7203 7206-7207 7228 7278 10420 10444 10451 10453 10542-10543 10556 10595 6/28802-28803 28849 28852-28853 28874-28875 28878-28879 28896-28897 28900-28901 28916 28918-28919 29090-29091 29094 29096-29097 29100-29101 29103 29118-29119 29162 29460-29461 29504-29505 29507 41598-41599 41653-41655 41657-41662 41671 41673 41675-41678 41684-41685 41688 41696-41698 41758-41759 41763 41766-41767 41769-41770 41772-41773 41780-41781 41801-41803 41811 41816-41817 41820 42155 42158-42159 42206-42207 42210-42211 42213-42217 42220 42228-42229 42378-42379 42390-42394 42396-42397 42400 42434-42435 42438-42441 42444-42445 42450-42451 42454-42457 42460-42461 42496-42498 42500-42501 43013-43015 43020 43024https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/500/3050?format=asciiRadiodefaultJ/MNRAS/500/3050/table1Fitted Gaussian parameters to CO spectra extracted towards ATLASGAL clumpsCSCATLASGAL namemeta.id;meta.maincharTransCO Transitionphys.atmol.transProb;phys.atmol.transitioncharSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTA*Antenna temperatureKphot.antennaTempfloate_TA*Antenna temperature errorKstat.errorfloatVLSRLSR velocitykm/sphys.veloc;pos.lsrfloate_VLSRLSR velocity errorkm/sstat.error;phys.veloc;pos.lsrfloatFWHMFull width at half-maximumkm/sspect.line.widthfloate_FWHMFull width at half-maximum errorkm/sstat.error;phys.angSizefloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainindexed_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainindexedJ/MNRAS/500/3050/table2*Assigned velocities and derived physical parameters for the ATLASGAL clumps13COFWHM? ^13^CO full width at half-maximumkm/sspect.line.widthfloatnullableL/M? Lbol/Mclump light-to-mass ratiophys.composition.massLightRatiofloatnullableRgcGalactocentric radiuskpcphys.size.radius;pos.galactocentricfloatGMCSEDIGISM namemeta.idcharsp13coShow the 13CO spectrummeta.ref.urlcharspc18oShow the C18O spectrummeta.ref.urlcharFig3Name of the spectrum image (png) in subdirectory fig3 (1)meta.id;obs.imagecharSP13COName of the ^13^CO spectrum file in subdirectory sp13cometa.id;meta.filecharSPC18OName of the C^18^O spectrum file in subdirectory spc18ometa.id;meta.filechar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCSCATLASGAL Namemeta.id;meta.maincharTransCO Transitionphys.atmol.transProb;phys.atmol.transitioncharVLSR? ATLASGAL LSR velocitykm/sphys.veloc;pos.lsrfloatnullable13COTA*? ^13^CO antenna temperatureKphot.antennaTemp;spect.linefloatnullableC18OTA*? C^18^O antenna temperatureKphot.antennaTempfloatnullableJ/MNRAS/500/3050/table3Properties of matched SEDIGISM GMCsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFWHMFull width at half-maximumkm/sspect.line.widthfloatRGCGalactocentric distancekpcpos.distance;pos.galactocentricfloatDGFcloud? Dense gas fraction, {Sigma}M_clump_/M_gmc_phys.mass;arith.ratiofloatnullableSFEcloud? Instantaneous star formation efficiency, {Sigma}L_clump_/M_gmc_phys.mass;arith.ratiofloatnullable_GlonPosition from SDG name (longitude part)degpos.galactic.lon_GlatPosition from SDG name (latitude part)degpos.galactic.latGMCSEDIGISM Namemeta.id;meta.mainchar_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