J/ApJ/834/57ivo://CDS.VizieR/J/ApJ/834/57doi:10.26093/cds/vizier.18340057CDSMiville-Deschenes M.-A.Murray N.Lee E.J.2025-08-29T20:10:29Z2017-06-12T09:39:22ZCDS support team

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

cds-question@unistra.frmolecular-cloudsco-line-emissiongalaxy-planesmilky-way-galaxyinterstellar-mediumThis study presents a catalog of 8107 molecular clouds that covers the entire Galactic plane and includes 98% of the ^12^CO emission observed within b+/-5^{deg}^. The catalog was produced using a hierarchical cluster identification method applied to the result of a Gaussian decomposition of the Dame+ (2001ApJ...547..792D) data. The total H_2_ mass in the catalog is 1.2x10^9^M_{sun}_, in agreement with previous estimates. We find that 30% of the sight lines intersect only a single cloud, with another 25% intersecting only two clouds. The most probable cloud size is R~30pc. We find that M{propto}R^2.2+/-0.2^, with no correlation between the cloud surface density, {Sigma}, and R. In contrast with the general idea, we find a rather large range of values of {Sigma}, from 2 to 300M_{sun}_/pc^2^, and a systematic decrease with increasing Galactic radius, R_gal_. The cloud velocity dispersion and the normalization {sigma}_0_={sigma}_v_/R^1/2^ both decrease systematically with R_gal_. When studied over the whole Galactic disk, there is a large dispersion in the line width-size relation and a significantly better correlation between {sigma}_v_ and {Sigma}R. The normalization of this correlation is constant to better than a factor of two for R_gal_<20kpc. This relation is used to disentangle the ambiguity between near and far kinematic distances. We report a strong variation of the turbulent energy injection rate. In the outer Galaxy it may be maintained by accretion through the disk and/or onto the clouds, but neither source can drive the 100 times higher cloud-averaged injection rate in the inner Galaxy.2017ApJ...834...57Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/834/57CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVIII/39 : Composite CO Survey of the Milky Way (Dame+ 1987)J/ApJ/833/229 : Star forming cloud-GMC complexes (Lee+, 2016)J/A+A/590/A131 : Giant molecular filaments in the MW (Abreu-Vicente+, 2016)J/ApJ/738/27 : Galactic HII regions RRL and continuum data (Balser+, 2011)J/ApJ/734/65 : CI radial velocities with HST/STIS (Jenkins+, 2011)J/ApJ/723/492 : Properties of GRS molecular clouds (Roman-Duval+, 2010)J/ApJS/184/1 : Molecular clouds in the LMC by NANTEN. II. (Kawamura+, 2009)J/ApJ/699/1153 : Kinematic dist. to GRS molecular clouds (Roman-Duval+, 2009)J/ApJ/699/1092 : Giant molecular clouds (SRBY) (Heyer+, 2009)J/ApJS/182/131 : Molecular clouds and clumps in the GRS (Rathborne+, 2009)J/ApJ/686/948 : CO in extragalactic giant molecular clouds (Bolatto+, 2008)J/ApJS/144/47 : Outer galaxy molecular cloud catalog (Brunt+, 2003)J/ApJ/582/756 : Velocities of HII regions (Kolpak+, 2003)J/ApJ/551/852 : FCRAO CO survey of the outer Galaxy (Heyer+, 2001)J/A+A/275/67 : Velocity Field of the outer Galaxy (Brand+ 1993)http://www.cfa.harvard.edu/rtdc/CO/ : CO data online archivehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/834/57https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/834/57http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/834/57https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/834/57https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/834/57http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/834/57GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/834/57/table1 (The molecular clouds catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/834/57/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/834/57/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/834/57/table1?GETtext/xml+votable180.050000true266.00720784-29.380925120.0055555555555555564/901 964 1377 1818-1819 1841 1845 1890-1891 1912 2460 2652-2653 5/437 445 447 449 459 482 490 759 764-766 789-791 795 798-799 821-823 825 903 907 911-912 922 930-932 936-938 3242-3243 3258 3262-3263 3519 3562-3563 3567 3571-3572 3574 3576 3578-3579 3582 3584-3585 3587-3589 3591 3600 3602-3603 3613 3650-3652 3654-3657 3660-3661 3663 3665-3667 3669-3673 3675-3677 3842-3843 3845-3849 3852-3854 3860 3862 3864 3904-3905 3907 3909 3920-3921 3924 5376 5378 5384 5386 5408 5418 5422 5528 5543 5552 5554 5910-5911 5916 5951 5986 7200 7202-7203 7206-7209 7212 7216 7218-7219 7222 7224-7225 7228-7229 7288 7290-7291 7294 7376-7377 7379 7384-7385 7389 7391 7554-7555 7558-7559 7576 7578-7580 7582-7583 7585 7588-7589 7591 7600-7601 7604-7605 7607 7613 7652 7654-7655 7657 7660-7661 7666-7667 7672-7673 7676 7678-7679 8020-8021 9303 9311 9333 9335 9341-9343 9429-9430 9435-9436 9438 9457 9459-9462 9465 9467-9468 9470-9471 9473 9482 9504 9506 9809 9811 9819 9849-9850 9940 9942 9948 9975 9981 9983 10398-10399 10413-10415 10417-10422 10424 10439 10441-10445 10449-10454 10456 10539 10542-10543 10552-10554 10556-10557 10594-10595 10597-10600 10624-10625 10628 10753-10756 6/1285 1287 1295-1296 1298-1299 1301 1303 1306-1307 1309-1310 1317 1320 1325 1328 1330 1334 1336 1338-1339 1341 1343 1354 1382 1413 1415 1428-1429 1431-1432 1434 1436 1438 1442 1445 1447 1454 1457 1460 1462 1464 1506 1630 1653 1655 1661 1663 1755 1757 1759 1765 1779 1785-1787 1794-1795 1801-1805 1807 1809-1812 1814 1816 1818-1819 1824-1825 1827-1829 1831-1832 1834-1835 1840 1842 1846 1848 1850 1920 1922-1923 1925-1927 1933-1934 1939 1952-1954 1956 1958-1959 1968 2943 3006-3007 3019 3023 3025 3027-3029 3031-3032 3035 3043 3045-3047 3049-3050 3052 3054-3055 3068-3069 3071 3141-3142 3145 3149 3151-3152 3154-3155 3169 3171-3173 3175 3177 3184-3186 3188-3190 3255 3258 3261 3263 3265-3266 3268-3269 3271-3273 3275-3276 3281-3283 3298-3299 3304-3306 3309-3312 3314-3315 3318 3321-3323 3334 3336 3338 3342 3362 3368 3370 3456 3458 3464 3594 3603-3606 3609-3611 3619 3621 3623 3625-3627 3633-3635 3637-3641 3643 3652 3655 3657-3658 3661 3663 3667 3681 3683-3686 3714-3717 3719 3732-3733 3735-3737 3739-3740 3756 3760-3762 3776 12960 12962 12965 12985-12987 12990-12991 13025 13027 13029-13030 13036 13038-13039 13047 13224 13226-13228 13240 13242-13244 13294-13295 13306 13311 14002 14014-14015 14031 14049 14052 14057-14059 14061-14063 14073-14075 14202 14204 14206-14207 14219 14239 14246 14258-14259 14262-14263 14265-14267 14275 14277-14280 14282 14292-14294 14300-14301 14303 14308-14309 14311 14321-14323 14326-14327 14332-14334 14347 14360-14362 14368-14369 14372 14387-14389 14393 14404-14406 14432-14433 14436-14438 14441 14444 14448-14449 14456-14457 14460 14463 14549 14594-14596 14598-14599 14612 14614-14615 14632-14633 14636-14637 14639 14649 14651 14657-14659 14672-14673 14675 14696-14697 14699 14712-14714 14716-14717 14719 14724-14725 14739 14784-14785 14788 14800 15361-15365 15367 15377 15379 15403-15406 15420-15422 15444 15446-15447 15452-15453 15455 15464 15468-15469 15473 15477 15479 15624 15632-15634 15640 15643-15645 15649 15653 15668 15689 15691-15694 15700-15702 15704-15705 15708 20807 20820-20821 20823 20825-20827 20830-20831 20853 20855 20861 20863 20949 20957 21518-21519 21542-21543 21548 21550-21551 21560 21638-21639 21641-21644 21646-21647 21651 21658 21664 21666-21667 21669 21671 21676-21677 21679-21680 21682 21684 21693-21694 21734 22017 22019 22021-22022 22028-22029 22031 22053 22055 22065-22066 22069-22072 22074-22077 22079 22088 22090 22120-22122 22126 22161 22165-22167 22193 22197-22198 22205 22207 22212 22214 22220-22221 22223 22232 22240-22241 22243-22245 22247-22248 22250-22251 22253-22256 22262 22264 22266-22268 22270-22271 23573 23575 23616 23621 23624 23627-23628 23631-23632 23634-23635 23637-23639 23648-23649 23652 23654 23668-23669 23671-23673 23676 23749 23761 23763-23764 23767 23769 23771-23772 23774-23775 23796-23798 23810 23816 23841-23843 23851 23936 23939 23968 23970-23972 23974 23977-23980 23982-23983 23995 24151 24156 24182 24191 24320-24321 24323-24324 24326 24329 24331-24332 24335 24341 24353 24355-24356 24358 24361 24364-24366 24369 24378 24424 24453 24472 24474-24475 24487 24493 24497 24505 24507-24508 24511 24514 24555 28712 28717-28718 28776 28778 28795 28806-28807 28818-28819 28821-28822 28853-28855 28859 28862-28863 28868 28870 28881-28883 28892 28894-28895 28905 28908-28909 28920-28921 28924-28925 28927 29065-29067 29070-29071 29080-29081 29083 29158-29159 29170-29171 29180 29182-29183 29248-29249 29252 29265-29266 29269 29276 29440 29444-29445 29447 29453 29455 29477 29488-29489 29492-29493 29512-29514 29545 29548-29549 29553-29555 29560-29561 29653 29866 30209-30211 30215 30225-30226 30228-30229 30274 30280-30282 30284 30308 30310-30311 30326-30327 30336-30337 30339 30360-30361 30408-30409 30412-30413 30424-30425 30427 30436 30449 30451 30461 30498 30504 30506 30508 30510-30511 30522 30612 30614-30615 30624-30626 30632 30637 30649-30650 30654-30655 30658-30659 30680 30686-30687 30697 30700-30702 30709-30711 32020-32021 32065 32068-32069 32076-32077 32079 32088 32091 32093-32094 37203 37205-37207 37209 37229 37231-37232 37235 37238-37239 37243 37316-37317 37319 37326 37329 37331 37337-37339 37355 37359-37362 37697 37700-37701 37703 37709-37712 37714-37715 37724 37727 37732-37733 37735 37739 37748 37750 37756 37758-37759 37827 37832 37852-37854 37859 37865 37878 37888 37890-37891 37896-37897 37899-37902 37904-37905 37907 37911 37913-37914 37919 37921-37926 37932-37934 37936 37939-37940 37942 37944 37947 37950-37951 37963 38020-38021 38023 38028-38030 38032 38034-38035 38044 38048 38050 38054 38056 38058-38059 38061 38067 38400 38403 38410 38443 38528 38531-38533 38536 38538 38542 38561 38570 39197 39199 39221 39223 39233 39241 39243 39248-39250 39252 39255-39256 39258-39259 39261 39265-39267 39269-39271 39273-39275 39280 39282 39288-39290 39295 39319 39327 39350 39357 39376 39384 39386 39388 39393 39406-39408 39410 39416 39418-39419 39701 39744-39745 39747-39750 39752 39756-39757 39759 39774 39776-39777 39781-39784 39789 39791 39798 39801-39806 39877 39879 39887 39889-39892 39895 39897 39899 39908-39909 39911 39918 39921-39923 39929 39931 39944 39970 40450 40460 40489 40491 40586 40609-40610 40612 40616 40618-40620 40623-40624 40634 41406 41449-41451 41455 41467 41471 41567 41575 41581 41590-41591 41619 41621 41624 41626 41629-41631 41640 41643 41645-41647 41649 41651 41666-41667 41695 41700 41702 41704 41706 41712 41715 41732-41733 41735 41737 41740 41743-41744 41746 41750-41751 41753-41755 41761-41763 41784-41785 41788 41793 41795 41820-41822 41828-41829 41835 41840 41842-41843 41856-41858 41860-41862 41864 41873 41875 42143 42150 42153-42155 42162-42163 42165-42167 42189-42191 42196-42198 42201-42203 42205-42207 42220-42222 42232-42234 42299 42303 42342 42346-42348 42350-42351 42354-42355 42362-42363 42366 42368 42370-42371 42374-42375 42385-42387 42404-42405 42408 42411 42416-42417 42420-42421 42425 42464-42465 42467-42469 42480-42481 42484-42485 42504-42505 42511 42516-42517 42522 42526 42529 42560-42561 42563 43010 43028 43036 43040-43042 43052 43078 43136 43138-43139 43144https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/834/57?format=asciiRadiodefaultJ/ApJ/834/57/table1The molecular clouds catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCloud[1/8107] Cloud numbermeta.id;meta.mainintNcomp[5/600] Number of Gaussian componentsmeta.numberintNpix[5/444] Number of pixels on the skymeta.numberintArea[0.07/7] Angular areadeg**2phys.angAreadoubleGLON[-179/180] Baricentric Galactic longitudedegpos.galactic.lonSigb[0.1/1.5] Standard deviation in GLON ({sigma}_l_)degphys.angSize;srcdoubleGLAT[-5.2/5] Baricentric Galactic latitudedegpos.galactic.latSigl[0.1/1.2] Standard deviation in GLAT ({sigma}_b_)degphys.angSizedoubleSimbadSimbad column added by the CDSmeta.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.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.decindexedtheta? Angle with respect to b=0degpos.posAngdoublenullableWCO[2/13929] Integrated CO emissionK.km/sphot.fluxdoubleNH2Average column densitycm**-2meta.numberdoubleSigma[1.8/739] Surface densitysolMass.pc**-2phot.flux.density.sbdoubleVcent[-188/185] Centroid velocitykm/sspect.dopplerVelocdoubleSigV[0.09/17] Velocity standard deviation ({sigma}_V_)km/sphys.veloc.dispersiondoubleRmax[0.1/3] Largest eigenvalue of the inertia matrixdegphys.angSizedoubleRmin[0.1/1.5] Smallest eigenvalue of the inertia matrixdegphys.angSize;srcdoubleRang[0.1/1.7] Angular radius (1)degphys.angSizedoubleRgal[0.003/97] Galacto-centric radiuskpcphys.size.radiusdoubleINFNear or far distance flag (0=near; 1=far) (2)meta.codeintDnear[0.001/88.5] Near kinematic distancekpcpos.distance;pos.heliocentricdoubleDfar[0.01/88.5] Far kinematic distancekpcpos.distance;pos.heliocentricdoubleznear[-2.8/1.6] Near distance to Galactic mid-planekpcpos.distance;pos.galactocentricdoublezfar[-2.8/1.6] Far distance to Galactic mid-planekpcpos.distance;pos.galactocentricdoubleSnear[/744960] Near derived physical areapc**2phys.areadoubleSfar[0.003/744960] Far derived physical areapc**2phys.areadoubleRnear[0.008/470] Near derived physical sizepcphys.angSizedoubleRfar[0.03/470] Far derived physical sizepcphys.angSizedoubleMnear[0.0003/] Near derived masssolMassphys.massdoubleMfar[0.01/] Far derived masssolMassphys.massdouble