J/A+A/636/A26ivo://CDS.VizieR/J/A+A/636/A26doi:10.26093/cds/vizier.36360026CDSHarsono D.Persson M.V.Ramos A.Murillo N.M.Maud L.T.,Hogerheijde M.R.Bosman A.D.Kristensen L.E.Jorgensen J.K.,Bergin E.A.Visser R.Mottram J.C.van Dishoeck E.F.2024-08-19T20:00:51Z2020-04-09T08:26:36ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsradio-spectroscopyWater is a key volatile that provides insights into the initial stages of planet formation. However, little is known about the water vapor abundance in newly formed planet-forming disks. We present H_2_^18^O line observations with ALMA and NOEMA millimeter interferometers toward five young stellar objects. NOEMA observed the 203GHz line while ALMA targeted the 390GHz line. No emission is detected toward any of our five Class I disks. We report upper limits to the integrated line intensities. The inferred water column densities in Class I disks are <10^15^cm^-2^ on 100au scales which include both disk and envelope. Water vapor is not abundant in warm protostellar envelopes around Class I protostars. Upper limits to the water vapor column densities in Class I disks are at least two orders magnitude lower than values found in Class 0 disk-like structures.2020A&A...636A..26Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/636/A26CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/636/A26https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/636/A26http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/636/A26https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/636/A26https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/636/A26http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/636/A26GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/636/A26/list (List of fits images and spectral cubes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/636/A26/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/636/A26/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/636/A26/list?GETtext/xml+votable180.050000true246.78922-24.622010.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/636/A266/1054 42981https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/636/A26?format=asciiMillimeterdefaultJ/A+A/636/A26/listList of fits images and spectral cubesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right Ascension of center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of center (J2000)degpos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintNyNumber of pixels along Y-axismeta.numberintNz? Number of slices for the datcubesmeta.numberintnullableObs.dateObservation datestime.epoch;obsnullablebFreq? Observed frequency or lower value of frequency interval for the datacubesGHzem.freqfloatnullableBFreq? Upper value of frequency interval for the datacubesGHzem.freq;stat.maxfloatnullabledFreq? Frequency resolutionHzspect.resolutiondoublenullablebVRAD? Radial velocity or lower value of radial velocity interval for the datacubesm/sphys.veloc;pos.heliocentricdoublenullableBVRAD? Upper value of radial velocity interval for the datacubesm/sphys.veloc;pos.heliocentricfloatnullabledVRAD? Radial velocity resolution for the datacubesm/sspect.resolutiondoublenullablesizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fits