J/A+AS/134/241ivo://CDS.VizieR/J/A+AS/134/241CDSPhillips J.P.1999-03-17T10:51:20Z1999-03-17T11:50:31ZCDS support team

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

cds-question@unistra.frnebulaegalaxy-classification-systemsWe have investigated a broad range of evidence concerning rotation in molecular clouds. As a consequence, we show that trends in specific angular momentum J/M and angular velocity {Omega} are inconsistent with certain models of isothermal, non-magnetic cloud rotation. Similarly, models of rotation which invoke turbulent vorticity may have only limited applicability to clumps and condensations. There is evidence to favour an important role for rotation in maintaining the stability of disks, larger cloud structures, and perhaps a large fraction of intermediate sized clouds, whilst rotation may also be implicated in maintaining observed departures from cloud sphericity.1999A&AS..134..241Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/134/241CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/134/241https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/134/241http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/134/241https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/134/241https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/134/241http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/134/241GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+AS/134/241/table1 (Rotational parameters of molecular clouds)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+AS/134/241/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+AS/134/241/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+AS/134/241/table1?GETtext/xml+votable180.050000true7.21213265.4460540.005555555555555556https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+AS/134/241?format=asciiOpticaldefaultJ/A+AS/134/241/table1Rotational parameters of molecular cloudsNameName of sourcemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoteNotes, see file notes.txtmeta.notecharRA1950? Right ascension (1950.0)pos.eq.ra;meta.mainnullableDE1950? Declination (1950.0)pos.eq.dec;meta.mainnullablel_DistLimit flag on Distmeta.code.errorcharDist? Distance to cloudkpcpos.distancefloatnullableu_Dist[?] Uncertainty flag on Distmeta.code.errorcharRV? LSR velocity of cloudkm/sphys.veloc;pos.lsrfloatnullableDV? Kinematic line width (lower value of interval when "->")km/sspect.line.widthfloatnullableDV2? Upper kinematic line width when intervalkm/sspect.line.widthfloatnullablel_SizeLimit flag on Sizemeta.code.errorcharSizeSize of cloud, over the region of maximum velocity gradient, i.e. perpendicular to the axis of rotation. (lower value when interval)pcphys.size.diameterdoublen_Size[-> ] Indicates an intervalmeta.notecharSize2? Upper size of cloud when intervalpcphys.size.diameterfloatnullableTransMolecular transition(s) employed for the observationsmeta.id;phys.atmol.transitioncharL_OMEGALimit flag on OMEGAmeta.codecharOMEGAAngular rotation rate (lower value when interval)1e-14s**-1phys.veloc.rotatfloatOMEGA2? Upper angular rotation rate when interval1e-14s**-1phys.veloc.rotatfloatnullablel_GAMMA[~>] Limit flag on GAMMAmeta.code.errorcharGAMMA? Cloud aspect ratio determined from molecular emission contours (major axis/minor axis), corresponding to the region of rotationsrc.var.indexfloatnullablel_Mass[>= <] Limit flag on Massmeta.code.errorcharMass? Cloud mass for rotating cloud, or rotating portion of cloud, determined (primarily) from column density estimates. (lower value when interval)solMassphys.massdoublenullableMass2? Upper cloud mass value when intervalsolMassphys.massdoublenullableMassEm? Mass of embedded starssolMassphys.massfloatnullableTHETA? Orientation of rotation axis with respect to the galactic planedegsrc.orbital.inclinationintnullableTHETA2? Upper orientation of rotation axis value if interval, or second possible valuedegstat.paramintnullableOMEGAo[YN] Relative orientations of the cloud minor axis, and axis of rotationphys.size;arith.ratiocharu_OMEGAo[?] Uncertainty flag on OMEGAometa.code.errorcharTypeCloud typesrc.classcharr_NameReference(s), see file "\begin{tex}\vFile{J/A+AS/134/241/refs.dat}{refs.dat}\end{tex}"meta.refcharJ/A+AS/134/241/refsReferences of table1.datrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.refintAutAuthors' namemeta.bib.authorcharBibCodeReference in Bibcode formmeta.bib.bibcodechar