J/other/RAA/22.Iivo://CDS.VizieR/J/other/RAA/22.I5014doi:10.26093/cds/vizier/dx/ccktfabeCDSYu S.Jiang Z.Yang Y.Chen Z.Feng H.2026-02-10T20:08:05Z2023-08-30T14:14:46ZCDS support team

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

cds-question@unistra.frmolecular-cloudsradio-astronomyThe research of infall motion is a common means to study molecular cloud dynamics and the early process of star formation. Many works had been done in-depth research on infall. We searched the literature related to infall study of molecular cloud since 1994, summarized the infall sources identified by the authors. A total of 456 infall sources are cataloged. We classify them into high-mass and low-mass sources, in which the high-mass sources are divided into three evolutionary stages: prestellar, protostellar and HII region. We divide the sources into clumps and cores according to their sizes. The H_2_ column density values range from 1.21x10^21^ to 9.75x10^24^cm^-2^, with a median value of 4.17x10^22^cm^-2^. The H_2_ column densities of high-mass and low-mass sources are significantly separated. The median value of infall velocity for high-mass clumps is 1.12km/s, and the infall velocities of lowmass cores are virtually all less than 0.5km/s. There is no obvious difference between different stages of evolution. The mass infall rates of low-mass cores are between 10^-7^ and 10^-4^M_{sun}_/yr, and those of high-mass clumps are between 10^-4^ and 10^-1^M_{sun}_/yr with only one exception. We do not find that the mass infall rates vary with evolutionary stages.2022RAA....22i5014Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/RAA/22.I5014CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/426/503 : Catalogue of high velocity molecular outflows (Update)J/MNRAS/453/645 : Massive molecular outflows distance-limited sampleJ/ApJS/242/19 : CO outflow candidates toward W3/4/5 complex (Li+, 2019)J/ApJS/248/15 : CO obs. of molecular outflows in the Cygnus complexhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/RAA/22.I5014https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/RAA/22.I5014http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/RAA/22.I5014https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/RAA/22.I5014https://vizier.iucaa.in/viz-bin/votable?-source=J/other/RAA/22.I5014http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/RAA/22.I5014GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/other/RAA/22.I5014/tablea1 (The catalog of all collected infall sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/RAA/22.I5014/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/other/RAA/22.I5014/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/RAA/22.I5014/tablea1?GETtext/xml+votable180.050000true8.91708366.2397220.0055555555555555565/7278 10615 6/857-859 862 1050 1052 1054 1067 1075 1082 1168 1264 1344 1937 3011 3046 3061 3196 3649 3748 3849 9231 9242 13049 14052 14270 14287 14315 14317 14353 14358 14621 14670 14675 14683 14689 14693 14696 14704 15362 15411 15629 15668 15681-15683 15857 15965 16129 16196-16197 21456 22045 23560 23795 23969 23982 24282 24300 24378 24554 28802-28803 28808-28809 28812-28813 28824-28825 28827-28830 28875 28879 28896 28900-28901 28912 28915 28917 28919 29090-29091 29094 29097 29100-29101 29103 29116 29248 29461 29504-29506 29509-29511 29529 29532 30218-30219 30244 30255-30257 30260 30262 30268-30269 30312 30315 30317-30319 30328 30341 30343 30352 30354-30355 30366 30405 30417 30419-30420 30423 30519 30575 30592 30594 30618 30691-30692 30694-30695 30716 30719 31429 31602 31700 31761 37850 39895 41133 41653 41660-41661 41671 41676-41678 41682-41683 41763 41770 41778 41780 41782 41804 41813-41816 41820 42159 42169-42173 42207 42211 42213-42217 42224-42226 42228-42230 42376 42378-42379 42381-42382 42387 42390 42392-42393 42397 42434 42436 42438 42441 42445 42450-42451 42456-42458 42497-42499 42512 42738 42981 43014 43024-43025https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/RAA/22.I5014?format=asciiRadiodefaultJ/other/RAA/22.I5014/table1Tracers used in the literature, optically thick linesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSerial Numbermeta.id;meta.mainintLineSpectral linemeta.id;spect.linecharTransTransitionmeta.id;phys.atmol.transitioncharRFreqRest Frequency (1)GHzem.freqdoubleEuUpper level of energyKphys.energy;stat.maxfloatncritcritical density (2)cm**-3phys.densitydoubleJ/other/RAA/22.I5014/tablea1The catalog of all collected infall sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_No[+] +: source is considered as a core, and the rest are clumpsmeta.codecharNoInternal serial numbermeta.idintn_No[*] *: sources that are observed by interferometric arraymeta.notecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainONameOther namemeta.id;meta.maincharDistDistancekpcpos.distancefloatVLSR? Velocity corresponding to the peak position of the optically thin linekm/sphys.veloc;pos.lsrfloatnullableN(H2)? H_2_ column densitycm**-2phys.columnDensitydoublenullablen(H2)? H_2_ density numbercm**-3meta.number;phys.densitydoublenullableMass? MasssolMassphys.massdoublenullablen_Mass[*] Note on Mass (1)meta.notecharLinesOptically thick lines that show blue asymmetry (defined in table 1)meta.codechardeltav? Asymmetry of the spectral profilemeta.notefloatnullableVin? Infall velocitykm/sphys.velocfloatnullabledMin/dt? Mass infall ratesolMass/yrarith.rate;phys.massdoublenullableType[high low -] Mass type of the source high = high-mass, low = low-masssrc.classcharStage? Evolutionaty stage (2)meta.codeintnullableMaserMaser associated with these sources in the range of 1' (3)meta.id.assoccharOutflow[Y-] Sources associated with outflow provided in some literature within 2' (4)meta.codecharRefsReference(s) (5)meta.ref;pos.framechar