J/A+A/630/A69ivo://CDS.VizieR/J/A+A/630/A69doi:10.26093/cds/vizier.36300069CDSSaajasto M.Harju J.Juvela M.Tie L.Zhang Q.Liu S.-Y.Hirano N.,Wu Y.Kim K.-T.Tatematsu K.Wang K.Thompson M.2019-09-30T13:41:43Z2019-09-23T09:06:24ZCDS support team

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

cds-question@unistra.frinterstellar-mediumradio-sourcesmolecular-cloudsWe present molecular line and dust continuum observations of a Planck-detected cold cloud, G074.11+00.11. The cloud consists of a system of curved filaments and a central star-forming clump. The clump is associated with several infrared sources and H_2_O maser emission. We aim to determine the mass distribution and gas dynamics within the clump, to investigate if the filamentary structure seen around the clump repeats itself on a smaller scale, and to estimate the fractions of mass contained in dense cores and filaments. The velocity distribution of pristine dense gas can be used to investigate the global dynamical state of the clump, the role of filamentary inflows, filament fragmentation and core accretion. We use molecular line and continuum observations from single dish observatories and interferometry facilities to study the kinematics of the region. The molecular line observations show that the central clump may have formed as a result of a large-scale filament collision. The central clump contains three compact cores. Assuming a distance of 2.3kpc, based on Gaia observations and a three-dimensional extinction method of background stars, the mass of the central clump exceeds 700 solar masses, which is roughly 25% of the total mass of the cloud. Our virial analysis suggests that the central clump and all identified substructures are collapsing. We find no evidence for small-scale filaments associated with the cores. Our observations indicate that the clump is fragmented into three cores with masses in the range of [10,50] solar masses and that all three are collapsing. The presence of an H_2_O maser emission suggests active star formation. However the CO lines show only weak signs of outflows. We suggest that the region is young and any processes leading to star formation have just recently begun.2019A&A...630A..69Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/630/A69CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/630/A69https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/630/A69http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/630/A69https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/630/A69https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/630/A69http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/630/A69GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/630/A69/list (List of fits datacubes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/630/A69/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/630/A69/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/630/A69/list?GETtext/xml+votable180.050000true304.4977135.933390.0055555555555555566/14618https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/630/A69?format=asciiRadiodefaultJ/A+A/630/A69/ch3oh_1KVN CH_3_OH line from position 1VelVelocitykm/sphys.velocdoublerecnoRecord number assigned by the VizieR team. 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Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleTmbMean beam temperatureKphys.temperature;stat.meandoubleJ/A+A/630/A69/h2co_7KVN H_2_CO line from position 7recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleTmbMean beam temperatureKphys.temperature;stat.meandoubleJ/A+A/630/A69/h2co_9KVN H_2_CO line from position 9recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleTmbMean beam temperatureKphys.temperature;stat.meandoubleJ/A+A/630/A69/h2o_1KVN H_2_O line from position 1recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleTmbMean beam temperatureKphys.temperature;stat.meandoubleJ/A+A/630/A69/h2o_2KVN H_2_O line from position 2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleTmbMean beam temperatureKphys.temperature;stat.meandoubleJ/A+A/630/A69/n2h_1KVN N_2_H^+^ line from position 1recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleTmbMean beam temperatureKphys.temperature;stat.meandoubleJ/A+A/630/A69/n2h_2KVN N_2_H^+^ line from position 2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleTmbMean beam temperatureKphys.temperature;stat.meandoubleJ/A+A/630/A69/n2h_8KVN N_2_H^+^ line from position 8recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleTmbMean beam temperatureKphys.temperature;stat.meandoubleJ/A+A/630/A69/n2h_9KVN N_2_H^+^ line from position 9recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleTmbMean beam temperatureKphys.temperature;stat.meandoubleJ/A+A/630/A69/listList of fits datacubesrecnoRecord number assigned by the VizieR team. 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Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleJ/A+A/630/A69/n2h_4KVN N_2_H^+^ line from position 4recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleTmbMean beam temperatureKphys.temperature;stat.meandoubleJ/A+A/630/A69/n2h_5KVN N_2_H^+^ line from position 5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleTmbMean beam temperatureKphys.temperature;stat.meandoubleJ/A+A/630/A69/n2h_6KVN N_2_H^+^ line from position 6recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVelVelocitykm/sphys.velocdoubleTmbMean beam temperatureKphys.temperature;stat.meandoubleJ/A+A/630/A69/n2h_7KVN N_2_H^+^ line from position 7recnoRecord number assigned by the VizieR team. 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