J/A+A/591/A5ivo://CDS.VizieR/J/A+A/591/A5doi:10.26093/cds/vizier.35910005CDSLi G.-X.Urquhart J.S.Leurini S.Csengeri T.Wyrowski F.,Menten K.M.Schuller F.2017-07-03T14:25:38Z2016-06-03T07:28:22ZCDS support team

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

cds-question@unistra.frsurveysinterstellar-mediumgalaxy-classification-systemsWe study the properties of filamentary structures from the ATLASGAL survey. We use the DisPerSE algorithm to identify spatially coherent structures located across the inner-Galaxy (300<l<60 and |b|<1.5). We have determined distances, masses and physical sizes for 241 of the filamentary structures. We find a median distance of 3.8kpc, a mean mass of a few 10^3^M_{sun}_, a mean length of ~6pc and a mass-to-length ratio of (M/L)~200-2000M_sun/pc. We also find that these filamentary structures are tightly correlated with the spiral arms in longitude and velocity, and that their semi-major axis is preferentially aligned parallel to the Galactic mid-plane and therefore with the direction of large-scale Galactic magnetic field. We find many examples where the dense filaments identified in ATLASGAL are associated with larger scale filamentary structures (~100pc), and argue that this is likely to be common, and as such these may indicate a connection between large-scale Galactic dynamics and star formation. We have produced a large and Galaxy-wide catalogue of dense filamentary structures that are representative of a particular size and mass range not previously well studied in the literature. Analyses of the properties and distribution of these filaments reveals that they are correlated with the spiral arms and make a significant contribution to star formation in the Galaxy. Massive star formation is ongoing within ~20% of the filaments and is strongly correlated with the filaments with the largest mass-to- length ratios. The luminosity of the embedded sources has a similar distribution to the Galactic-wide samples of young massive stars and can therefore be considered to be representative.2016A&A...591A...5Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/591/A5CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/540/A113 : Starless clumps in ATLASGAL (Tackenberg+, 2012)J/A+A/544/A146 : ATLASGAL cold high-mass clumps with NH_3_ (Wienen+, 2012)J/A+A/549/A45 : ATLASGAL Compact Source Catalog: 330<l<21 (Contreras+, 2013)J/MNRAS/431/1752 : ATLASGAL 6.7GHz methanol masers (Urquhart+, 2013)J/MNRAS/435/400 : ATLASGAL Properties of compact HII regions (Urquhart+, 2013)J/MNRAS/443/1555 : ATLASGAL massive star forming clumps sample (Urquhart+ 2014)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/570/A65 : ATLASGAL massive clumps CO depletion (Giannetti+, 2014)J/A+A/579/A91 : ATLASGAL inner Galaxy massive cold dust clumpsJ/A+A/581/A74 : Molecular clouds as viewed by ATLASGAL (Abreu-Vicente+ 2015)J/A+A/586/A149 : SiO in ATLASGAL-selected massive clumps (Csengeri+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/591/A5https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/591/A5http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/591/A5https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/591/A5https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/591/A5http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/591/A5GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/591/A5/table1 (Catalogue of ATLASGAL structures extracted by DisPerSE and identified as filaments by visual inspection of the emission maps)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/591/A5/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/591/A5/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/591/A5/table1?GETtext/xml+votable180.050000true267.5596-29.096080.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/591/A55/7202 7206-7207 7225 7228-7229 7275 7278 7376-7377 7383 7564 10453 10556 6/28803 28812-28813 28815 28818 28853 28872 28874-28875 28879 28890 28896-28897 29090-29091 29095 29097 29118-29119 29456-29457 29461 29463 29522 29528-29529 30216 30218-30219 30241 30244-30245 30260 30262-30263 30269 30312-30313 30315 30318-30319 30330 30404-30405 30417 30420-30421 30595 30601 30604 30622 30644 30688 30691-30692 30694 30710 30719 41599 41655 41663 41671 41676-41678 41757 41759 41766-41767 41770 41779-41780 41782 41798 41803-41804 41811 41820 42158-42159 42169-42174 42203 42206-42207 42210-42211 42213-42217 42228-42229 42378-42379 42381-42383 42391-42393 42396-42398 42400 42434-42435 42437-42441 42444-42445 42447 42450-42451 42454-42457 42459-42461 42463 42496 42498-42499 42501 42512 43021 43024 430322.283270615984385e-22 2.283270615984385e-22https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/591/A5?format=asciiOpticaldefaultJ/A+A/591/A5/table1Catalogue of ATLASGAL structures extracted by DisPerSE and identified as filaments by visual inspection of the emission mapsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPropindicates physical properties in table3meta.ref.urlcharimgDisplay the 3 colour imagemeta.ref.urlcharNameName (GLLL.lll+B.bbb) derived from Galactic coordinates of the maximum intensity in the structuremeta.id;meta.maincharprimaryAg[1/6] Level of agreement (1)meta.codeintGLONGalactic longitudedegpos.galactic.londGLONAngular extend in GLONdegphys.angSize;srcfloatGLATGalactic latitudedegpos.galactic.latdGLATAngular extend in GLATdegphys.angSize;srcfloatsmajSemi-major sizearcminphys.angSize;srcfloatsminSemi-minor sizearcminphys.angSizefloatAspectAspect ratiophys.size.axisRatiofloatthetaPosition angle measured anti-clockwise from Galactic mid-planedegpos.posAngfloatWidthWidth estimated from the normalized intensity distributionarcsecspect.line.widthfloatSintIntegrated 870um flux densities determined from the flux of all pixels found within the skeleton boxJyphot.flux.density;em.mm.200-400GHzfloatnPixNumber of connecting pixels that form the spine of the skeletonmeta.numberintnCSC? Number of associated clumps identified in the ATLASGAL CSCmeta.numberintnullabletarDownload all images as a tar filemeta.ref.urlchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)degpos.eq.decnullableindexedJ/A+A/591/A5/table3Physical properties of the 279 ATLASGAL filaments for which a velocity has been determinedNameStructure namemeta.id;meta.maincharWidth? Widthpcphys.size.diameterfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVlsrLSR velocitykm/sphys.veloc;pos.lsrfloatr_VlsrReference(s) for Vlsr, in refs.dat filemeta.ref;phys.veloc;pos.framecharn_VlsrNote on Vlsrmeta.notecharDist? Distancekpcpos.distancefloatnullabler_DistReference(s) for Dist, in refs.dat filemeta.ref;pos.framecharn_DistNote on Distmeta.notecharLength? Lengthpcsrc.morph.scLengthfloatnullablelogMtot? Total masslog(solMass)phys.massfloatnullablelogNH2mMean H_2_ column densitylog(cm**-2)phys.columnDensity;stat.meanfloatlogNH2pPeak H_2_ column densitylog(cm**-2)phys.columnDensity;stat.maxfloatIRDC? IRDC associatedmeta.id.associntnullableBubbleBubble associatedmeta.id.assoccharJ/A+A/591/A5/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notecharJ/A+A/591/A5/listList of images of all the 1812 structures identifiedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource namemeta.id;meta.mainchar24umName of the fits fimage at 24um in subdirectory fits_24ummeta.idchar3.6umName of the fits image at 3.6um in subdirectory fits_i1meta.id;meta.filechar8.0umName of the fits image at 8.0um in subdirectory fits_i4meta.id;meta.filecharatlasgalName of the fits image at 670um in subdirectory fits_atlasgalmeta.notecharskeletonName of the fits image skeleton in subdirectory fits_skeletonmeta.notecharimageName of the 3 color composite image in subdirectory imagesmeta.id;meta.filechar