J/ApJS/153/523ivo://CDS.VizieR/J/ApJS/153/523doi:10.26093/cds/vizier.21530523CDSLee C.W.Myers P.C.Plume R.2017-10-11T05:13:26Z2010-10-07T14:07:02ZCDS support team

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

cds-question@unistra.frinterstellar-mediumsurveysspectroscopyWe present CS(3-2) and DCO^+^(2-1) observations of 94 starless cores and compare the results with previous CS(2-1) and N_2_H^+^(1-0) observations to study inward motions in starless cores. Eighty-four cores were detected in both CS and DCO^+^ lines. We identify 18 infall candidates based on observations of CS(3-2), CS(2-1), DCO^+^(2-1) and N_2_H^+^(1-0). The eight best candidates, L1355, L1498, L1521F, L1544, L158, L492, L694-2, and L1155C-1, each show at least four indications of infall asymmetry and no counterindications. Fits of the spectra to a two-layer radiative transfer model in ten infall candidates suggest that the median effective line of sight speed of the inward-moving gas is ~0.07km/s for CS(3-2) and ~0.04km/s for CS(2-1).2004ApJS..153..523Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/153/523CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/526/788 : Survey of infall motions toward starless cores (Lee+, 1999)J/ApJS/123/233 : Catalog of Optically selected cores (Lee+, 1999)J/ApJS/152/81 : CO survey toward starless cores (Park+, 2004)J/ApJ/664/928 : Starless cores in HCN(J=1-0) (Sohn+ 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/153/523https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/153/523http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/153/523https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/153/523https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/153/523http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/153/523GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/153/523/table1 (Starless cores observed in CS(3-2) and/or DCO^+^(2-1) lines)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/153/523/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/153/523/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/153/523/table1?GETtext/xml+votable180.050000true36.55735675.4509260.0055555555555555566/1039 1048 1050 1052 1067 1074 1075 1080 1114 1126 1129 1136 1290 1542 1825 1959 1968 3755 3849 3898 14002 14199 14270 14319 14710 15411 15541 15543 15556 15590 15964 15965 16197 16198 22829 23549 23560 23739 23970 24300 24305 29350 29354 29362 29560 29561 29657 29661 30344 30346 30575 30621 30743 30792 30793 30798 31257 31263 32011 39396 42727 42736 42737 42738 42777 42970 42981 42992 42993https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/153/523?format=asciiOpticaldefaultJ/ApJS/153/523/table1Starless cores observed in CS(3-2) and/or DCO^+^(2-1) linessrc[1/2] Source selection (4)meta.ref;pos.frameintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[LM99]Observed region namemeta.id;obs.fieldcharf_[LM99][v] Flag for L1271-1 (5)meta.codecharRAB1950Central hour of right ascension (B1950)pos.eq.ra;meta.mainDEB1950Central degree of declination (B1950)pos.eq.dec;meta.mainl_TCS[<= ] Limit flag on TCS (1)meta.code.errorcharTCS? Antenna temperature of CS(3-2) line (146.97GHz)Kphot.antennaTempfloatnullablel_TDCO[<= ] Limit flag on TDCO (1)meta.code.errorcharTDCO? Antenna temperature of DCO^+^(2-1) (144.08GHz)Kphot.antennaTempfloatnullableVCS? Velocity of CS(3-2) line (146.97GHz) (2)km/sspect.dopplerVelocfloatnullablee_VCS? VCS uncertaintykm/sstat.errorfloatnullableVDCO? Velocity of DCO^+^(2-1) line (144.08GHz) (2)km/sspect.dopplerVelocfloatnullablee_VDCO? VDCO uncertaintykm/sstat.errorfloatnullabledVCS? Normalized velocity difference of CS(3-2) (3)phys.veloc;arith.difffloatnullablee_dVCS? dVCS uncertaintystat.errorfloatnullabledVDCO? Normalized velocity difference of DCO^+^(2-1) (3)phys.veloc;arith.difffloatnullablee_dVDCO? dVDCO uncertaintystat.errorfloatnullableLM99Data from optically selected cores catalog, Lee and Myers, 1999, Cat. J/ApJS/123/233meta.ref.urlcharLee+99Data from starless cores survey, Lee et al., 1999, Cat. J/ApJS/526/788meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refchar_RA.icrsRight ascension (ICRS) (computed by VizieR, not part of the original data)pos.eq.ranullableindexed_DE.icrsDeclination (ICRS) (computed by VizieR, not part of the original data)pos.eq.decnullableindexed