J/ApJ/875/L9ivo://CDS.VizieR/J/ApJ/875/L9doi:10.26093/cds/vizier.18759009CDSWilliams J.P.Cieza L.Hales A.Ansdell M.Ruiz-Rodriguez D.,Casassus S.Perez S.Zurlo A.2021-01-19T11:47:50Z2020-10-21T14:01:51ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsmillimeter-astronomysubmillimeter-astronomystellar-distanceradio-continuum-emissionAs protostars evolve from optically faint/infrared-bright (Class I) sources to optically bright/infrared-faint (Class II) the solid material in their surrounding disks accumulates into planetesimals and protoplanets. The nearby, young Ophiuchus star-forming region contains hundreds of protostars in a range of evolutionary states. Using the Atacama Large Millimeter Array to observe their millimeter continuum emission, we have measured masses of, or placed strong upper limits on, the dust content of 279 disks. The masses follow a log-normal distribution with a clear trend of decreasing mass from less to more evolved protostellar infrared class. The (logarithmic) mean Class I disk mass, M=3.8M_{Earth}_, is about 5 times greater than the mean Class II disk mass, but the dispersion in each class is so high, {sigma}_logM_~0.8-1, that there is a large overlap between the two distributions. The disk mass distribution of flat-spectrum protostars lies in between Classes I and II. In addition, three Class III sources with little to no infrared excess are detected with low disk masses, M~0.3M_{Earth}_. Despite the clear trend of decreasing disk mass with protostellar evolutionary state in this region, a comparison with surveys of Class II disks in other regions shows that masses do not decrease monotonically with age. This suggests that the cloud-scale environment may determine the initial disk mass scale or that there is substantial dust regeneration after 1Myr.2019ApJ...875L...9Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/875/L9CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/332 : c2d Spitzer final data release (DR4) (Evans+, 2003)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/ApJS/181/321 : Properties of Spitzer c2d dark clouds (Evans+, 2009)J/ApJ/771/129 : Submillimetric Class II sources of Taurus (Andrews+, 2013)J/ApJ/827/142 : ALMA obs. of GKM stars in Upper Sco (Barenfeld+, 2016)J/AJ/153/240 : Protoplanetary disks in sigma Ori with ALMA (Ansdell+, 2017)J/ApJ/869/L41 : DSHARP I. Sample, ALMA obs. log and overview (Andrews+, 2018)J/ApJ/859/21 : Lupus protoplanetary disks with ALMA. II. (Ansdell+, 2018)J/ApJS/238/19 : VANDAM IV. Free-free emissions (Tychoniec+, 2018)J/MNRAS/482/698 : Ophiuchus DIsc Survey Employing ALMA. I. (Cieza+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/875/L9https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/875/L9http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/875/L9https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/875/L9https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/875/L9http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/875/L9GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/875/L9/table1 (Disk distances and flux densities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/875/L9/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/875/L9/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/875/L9/table1?GETtext/xml+votable180.050000true245.1425-24.4369440.0055555555555555565/10745 6/42957 42959 42967 42969 42970 42971 42972 42989 42992 42994 430001.4908656533193022e-22 1.4908656533193022e-22https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/875/L9?format=asciiMillimeterRadiodefaultJ/ApJ/875/L9/table1Disk distances and flux densitiesSimbadNameSimbad column added by the CDSmeta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSSTc2dSpitzer source name (JHHMMSS.s+DDMMSS)meta.id;meta.maincharClassProtostellar classification (1)src.classcharDist[81.99/216.43] Distance to source (d) (2)pcpos.distance;pos.heliocentricfloatF225GHz[-0.31/361.2] Flux density at 225GHzmJyphot.flux.density;em.mm.200-400GHzfloate_F225GHz[0.1/1.22] RMS of F225GHzmJystat.errorfloatRAdeg[245/250]? Right Ascension of ALMA source (J2000)degpos.eq.ranullableDEdeg[-25.5/-22.9]? Declination of ALMA source (J2000)degpos.eq.decnullablePapIDisplay data from Paper I (Cieza+, 2019, J/MNRAS/482/698)meta.ref.urlintnullableGaiaDisplay the Gaia DR2 data (I/345) and Bailer-Jones+, 2018, I/347 within 1"meta.ref.urlchar_RAPositions from SSTc2d names (right ascension part)degpos.eq.ra;meta.main_DEPositions from SSTc2d names (declination part)degpos.eq.dec;meta.main