J/ApJ/872/121ivo://CDS.VizieR/J/ApJ/872/121doi:10.26093/cds/vizier.18720121CDSUehara K.Tsuboi M.Kitamura Y.Miyawaki R.Miyazaki A.2020-11-26T11:33:31Z2020-08-27T08:16:43ZCDS support team

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

cds-question@unistra.frmolecular-cloudsgalactic-centerinterstellar-mediuminterferometryradio-astronomyThe Galactic center 50km/s molecular cloud (50MC) is the most remarkable molecular cloud in the Sagittarius A region. This cloud is a candidate for the massive star formation induced by cloud-cloud collision (CCC) with a collision velocity of ~30km/s that is estimated from the velocity dispersion. We observed the whole of the 50MC with a high angular resolution (~2.0"x1.4") in Atacama Large Millimeter/submillimeter Array cycle 1 in the H^13^CO^+^ J=1-0 and C^34^S J=2-1 emission lines. We identified 241 and 129 bound cores with a virial parameter of less than 2, which are thought to be gravitationally bound, in the H^13^CO^+^ and C^34^S maps using the clumpfind algorithm, respectively. In the CCC region, the bound H^13^CO^+^ and C^34^S cores are 119 and 82, whose masses are 68% and 76% of those in the whole 50MC, respectively. The distribution of the core number and column densities in the CCC are biased to larger densities than those in the non-CCC region. The distributions indicate that the CCC compresses the molecular gas and increases the number of the dense bound cores. Additionally, the massive bound cores with masses of >3000M_{sun}_ exist only in the CCC region, although the slope of the core mass function (CMF) in the CCC region is not different from that in the non-CCC region. We conclude that the compression by the CCC efficiently formed massive bound cores even if the slope of the CMF is not changed so much by the CCC.2019ApJ...872..121Uhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/872/121CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/428/693 : Rosette Nebula and Maddalena Cloud structures (Williams+ 1994)J/ApJ/665/1194 : Dense cores in the Orion A cloud survey (Ikeda+, 2007)J/ApJ/691/1560 : Dense core survey in the Orion B cloud (Ikeda+, 2009)J/ApJ/702/178 : YSOs in the central 400pc of the Galaxy (Yusef-Zadeh+, 2009)J/PASJ/67/90 : Central Molecular Zone in H^13^CO^+^ (Tsuboi+, 2015)J/A+A/588/A131 : Warm ISM in the Sagittarius A Complex (Garcia+, 2016)J/A+A/603/A68 : Images of molecular & ionized gas around Sgr A* (Moser+, 2017)J/ApJS/244/35 : VLA observations of the Central Molecular Zone (Lu+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/872/121https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/872/121http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/872/121https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/872/121https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/872/121http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/872/121GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/872/121/table4 (The property of identified molecular cloud cores in the C^34^S J=2-1 emission line)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/872/121/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/872/121/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/872/121/table4?GETtext/xml+votable180.050000true266.507809-28.9705380.005555555555555556Cone search capability for table J/ApJ/872/121/table3 (The property of identified molecular cloud cores in the H^13^CO^+^ J=1-0 emission line)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/872/121/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/872/121/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/872/121/table3?GETtext/xml+votable180.050000true266.517083-28.975480.0055555555555555566/28830https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/872/121?format=asciiRadiodefaultJ/ApJ/872/121/table4The property of identified molecular cloud cores in the C^34^S J=2-1 emission linerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/3293] Sequential running numbermeta.id;meta.mainintSubsetSubset flag(s) (1)meta.codecharGLON[-0.05/0.018] Galactic longitude of the core position (2)degpos.galactic.lonGLAT[-0.12/-0.04] Galactic latitude of the core position (2)degpos.galactic.latVlsr[2/94] LSR velocity of the core (2)km/sphys.veloc;pos.lsrintRad[0.04/0.4] Core radiuspcphys.size.radiusfloatdV[2/22] Core FWHM velocity widthkm/sspect.line.widthfloatTpeak[0.5/4] Peak temperature of the coreKphys.temperature;stat.maxfloatMvir[0.76/230] Virial mass100solMassphys.massfloatMlte[0.02/55] LTE mass100solMassphys.massfloatalpha[0.4/800] virial parameter, {alpha}phys.mass;arith.ratiofloatnd[0.05/25] Mean number density100000cm**-3meta.idfloatpek/kB[-11/120] Required external pressure1e+08K.cm**-3phys.pressurefloatCCCIs located in the cloud-cloud collision (CCC) region or not (non-CCC)meta.codechar_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.ranullableindexed_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.decnullableindexedJ/ApJ/872/121/table3The property of identified molecular cloud cores in the H^13^CO^+^ J=1-0 emission linerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/3293] Sequential running numbermeta.id;meta.mainintSubsetSubset flag(s) (1)meta.codecharGLON[-0.05/0.018] Galactic longitude of the core position (2)degpos.galactic.lonGLAT[-0.12/-0.04] Galactic latitude of the core position (2)degpos.galactic.latVlsr[2/94] LSR velocity of the core (2)km/sphys.veloc;pos.lsrintRad[0.04/0.4] Core radiuspcphys.size.radiusfloatdV[2/22] Core FWHM velocity widthkm/sspect.line.widthfloatTpeak[0.5/4] Peak temperature of the coreKphys.temperature;stat.maxfloatMvir[0.76/230] Virial mass100solMassphys.massfloatMlte[0.02/55] LTE mass100solMassphys.massfloatalpha[0.4/800] virial parameter, {alpha}phys.mass;arith.ratiofloatnd[0.05/25] Mean number density100000cm**-3meta.idfloatpek/kB[-11/120] Required external pressure1e+08K.cm**-3phys.pressurefloatCCCIs located in the cloud-cloud collision (CCC) region or not (non-CCC)meta.codechar_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.ranullableindexed_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.decnullableindexed