J/ApJ/867/94ivo://CDS.VizieR/J/ApJ/867/94doi:10.26093/cds/vizier.18670094CDSKong S.Tan J.C.Caselli P.Fontani F.Wang K.Butler M.J.2019-11-08T12:37:45Z2019-11-08T13:28:08ZCDS support team

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

cds-question@unistra.frinterstellar-mediummillimeter-astronomysubmillimeter-astronomyWe present high-resolution (0.2", 1000au) 1.3mm ALMA observations of the massive infrared dark cloud clump, G028.37+00.07-C1, thought to harbor the early stages of massive star formation. Using N_2_D^+^(3-2), we resolve the previously identified C1-S core, separating the bulk of its emission from two nearby protostellar sources. C1-S is thus identified as a massive (~50M_{sun}_), compact (~0.1pc diameter) starless core, e.g., with no signs of outflow activity. Being highly deuterated, this is a promising candidate for a pre-stellar core on the verge of collapse. An analysis of its dynamical state indicates a sub-virial velocity dispersion compared to a trans-Alfvenic turbulent core model. However, virial equilibrium could be achieved with sub- Alfvenic conditions involving magnetic field strengths of ~2mG.2018ApJ...867...94Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/867/94CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/291/943 : Protostellar cores (Ossenkopf+, 1994)J/ApJ/641/389 : Millimetric observations of IRDC cores (Rathborne+, 2006)J/ApJS/175/509 : Ammonia spectral atlas in Perseus (Rosolowsky+, 2008)J/A+A/570/A51 : Molecular lines in 4 IRCS clumps (Shipman+, 2014)J/A+A/592/A21 : Are infrared dark clouds really quiescent? (Feng+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/867/94https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/867/94http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/867/94https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/867/94https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/867/94http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/867/94GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap1.528037907652962e-22 1.528037907652962e-22MillimeterdefaultJ/ApJ/867/94/table2Continuum flux measurement data for Figures 4 and 5recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRC1-sa[588/4193]? Projected radius for C1-Sa annuliAUpos.distanceintnullableFC1-sa[231/2266]? C1-Sa annulus 1.3mm continuum flux densityMJy/srphot.flux.density;em.mm.200-400GHz;spect.continuumintnullablee_FC1-sa[10/25]? Uncertainty in FC1-SaMJy/srstat.errorintnullableRC1-So[554/8954] Projected radius for C1-S outer annuliAUpos.distancefloatFC1-So[79/152] C1-S outer annulus 1.3mm continuum flux densityMJy/srphot.flux.density;em.mm.200-400GHz;spect.continuumfloate_FC1-So[7/27] Uncertainty in FC1-SoMJy/srstat.errorfloatFC1-Sos[46/118] C1-S outer with envelope subtraction annulus 1.3 mm continuum flux densityMJy/srphot.flux.density;em.mm.200-400GHz;spect.continuumfloate_FC1-Sos[25/37] Uncertainty in FC1-SosMJy/srstat.errorfloat