J/A+A/663/A56ivo://CDS.VizieR/J/A+A/663/A56doi:10.26093/cds/vizier.36630056CDSNeralwar K.R.Colombo D.Duarte-Cabral A.Urquhart J.S.Mattern M.,Wyrowski F.Menten K.M.Barnes P.Sanchez-Monge A.Beuther H.,Rigby A.J.Mazumdar P.Eden D.Csengeri T.Dobbs C.L.Veena V.S.,Neupane S.Henning T.Schuller F.Leurini S.Wienen M.Yang A.Y.,Ragan S.E.Medina S.Nguyen-Luong Q.2022-08-26T08:00:58Z2022-07-13T14:01:43ZCDS support team

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

cds-question@unistra.frmilky-way-galaxymolecular-cloudsWe present one of the very first extensive classifications of a large sample of molecular clouds based on their morphology. This is achieved using a recently published catalogue of 10663 clouds obtained from the first data release of the Structure, Excitation and Dynamics of the Inner Galactic InterStellar Medium (SEDIGISM) survey. The clouds are classified into four different morphologies by visual inspection and using an automated algorithm - J plots. The visual inspection also serves as a test for the J plots algorithm, as this is the first time it has been used on molecular gas. Generally, it has been found that the structure of molecular clouds is highly filamentary and our observations indeed verify that most of our molecular clouds are elongated structures. Based on our visual classification of the 10663 SEDIGISM clouds, 15% are ring-like, 57% are elongated, 15% are concentrated and 10% are clumpy clouds. The remaining clouds do not belong to any of these morphology classes and are termed unclassified. We compare the SEDIGISM molecular clouds with structures identified through other surveys, i.e. the elongated structures from APEX Telescope Large Area Survey of the Galaxy (ATLASGAL) and the bubbles from Milky Way Project (MWP). We find that many of the ATLASGAL and MWP structures are velocity coherent. ATLASGAL elongated structures overlap with ~21% of the SEDIGISM elongated structures (elongated and clumpy clouds) and MWP bubbles overlap with ~ 25% of the SEDIGISM ring-like clouds. We also analyse the star-formation associated with different cloud morphologies using two different techniques. The first technique examines star formation efficiency (SFE) and the dense gas fraction (DGF), based on SEDIGISM clouds and ATLASGAL clumps data. The second technique uses the high-mass star formation (HMSF) threshold for molecular clouds. The results indicate that clouds with ring-like and clumpy morphologies show a higher degree of star formation.2022A&A...663A..56Nhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/663/A56CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/591/A5 : ATLASGAL dense filamentary structures (Li+, 2016)J/MNRAS/488/1141 : Milky Way Project DR2 bubbles + bow shockshttps://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/A+A/663/A56https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/663/A56http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/663/A56https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/663/A56https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/663/A56http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/663/A56GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/663/A56/tablea1 (Morphologies of the clouds from the SEDIGISM cloud catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/663/A56/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/663/A56/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/663/A56/tablea1?GETtext/xml+votable180.050000true187.755451-63.01068720.0055555555555555565/7202-7203 7206-7207 7228-7229 7275 7278 7376 10419-10420 10444 10451 10453 10542-10543 10556 10595 10624 6/28802-28803 28818 28848-28849 28852-28853 28874-28875 28878-28879 28896-28897 28900-28901 28903 28925 29090-29091 29094 29096-29097 29118-29119 29162 29457 29460-29461 41598-41599 41653-41655 41657-41662 41671 41673-41675 41684-41686 41688 41696-41698 41758-41759 41763 41766-41770 41772-41773 41780-41781 41784 41799 41801-41803 41810-41811 41816-41817 41820 41824 41856 42155 42158-42159 42206-42207 42210-42211 42213-42217 42220 42228-42229 42377-42379 42387 42390-42394 42396-42397 42400 42434-42435 42438-42441 42444-42445 42450-42451 42454-42457 42460-42461 42500-42501 42512 43013-43015 43020-43021 43024-43026https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/663/A56?format=asciidefaultJ/A+A/663/A56/tablea1Morphologies of the clouds from the SEDIGISM cloud cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMoreindicates overlapping with ATLASGAL filaments, ATLASGAL elongated structures and/or MWP bubblesmeta.ref.urlchar_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.decnullableindexedCloudID[1/10663] Unique cloud ID number described by DC21 (1)meta.idintprimaryNameCloud name, SDG followed by Galactic coordinates as described by DC21 (1)meta.id;meta.maincharJ1[-0.44/0.89] J moment of the cloud corresponding to principal inertial axis I_1_phys.angMomentumdoubleJ2[-0.88/0.34] J moment of the cloud corresponding to principal inertial axis I_2_phys.angMomentumdoubleJStructureStructure of the cloud determined by J plot analysissrc.classcharSubclassOriginal sub-class of cloud estimated using by-eye analysis (App: ks test)src.classcharStructureStructure of cloud determined using by-eye analysissrc.classcharscience[0/1] tag identifying if the cloud belongs to science sample (described in DC20) (yes = 1, no = 0)meta.codeintVCSamp[0/1] tag identifying if the cloud belongs to visually classified (VC) sample (yes = 1, no = 0)meta.codeintMR[0/1] tag identifying if the cloud belongs to morphologically reliable (MR) sample (yes = 1, no = 0)meta.codeintNAG-ElNumber of AG-El overlapping with the cloudmeta.numberintNAG-FilNumber of AG-Fil overlapping with the cloudmeta.numberintNMWPNumber of MWP bubbles overlapping with the cloudmeta.numberint_GlonPosition from name (longitude part)degpos.galactic.lonindexed_GlatPosition from name (latitude part)degpos.galactic.latindexedJ/A+A/663/A56/tablea2ATLASGAL filaments overlapping with the SEDIGISM cloudsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCloudID[16/10657] ID number of SEDIGISM cloudmeta.idintATLASGALName of the ATLASGAL structure overlapping with the SEDIGISM cloud (2)meta.idcharJ/A+A/663/A56/tablea3ATLASGAL elongated structures overlapping with the SEDIGISM cloudsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCloudID[16/10657] ID number of SEDIGISM cloudmeta.idintATLASGALName of the ATLASGAL structure overlapping with the SEDIGISM cloud (2)meta.idcharJ/A+A/663/A56/tablea4MWP bubbles overlapping with the SEDIGISM cloudsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCloudID[6/10657] ID number of SEDIGISM cloudmeta.idintMWPName of the MWP bubble overlapping with the SEDIGISM cloud (3)meta.idchar