J/A+A/563/L1ivo://CDS.VizieR/J/A+A/563/L1doi:10.26093/cds/vizier.35639001CDSMaret S.Belloche A.Maury A.J.Gueth F.Andre P.Cabrit S.,Codella C.Bontemps S.2014-08-23T09:23:25Z2014-02-25T07:54:35ZCDS support team

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

cds-question@unistra.fryoung-stellar-objectsinfrared-sourcesmillimeter-astronomysubmillimeter-astronomyThe structure and kinematics of Class 0 protostars on scales of a few hundred AU is poorly known. Recent observations have revealed the presence of Keplerian disks with a diameter of 150-180AU in L1527-IRS and VLA1623A, but it is not clear if such disks are common in Class 0 protostars. Here we present high-angular-resolution observations of two methanol lines in NGC1333-IRAS2A. We argue that these lines probe the inner envelope, and we use them to study the kinematics of this region. Our observations suggest the presence of a marginal velocity gradient normal to the direction of the outflow. However, the position velocity diagrams along the gradient direction appear inconsistent with a Keplerian disk. Instead, we suggest that the emission originates from the infalling and perhaps slowly rotating envelope, around a central protostar of 0.1-0.2M_{sun}_. If a disk is present, it is smaller than the disks of L1527-IRS and VLA1623A, perhaps suggesting that NGC1333-IRAS2A is younger.2014A&A...563L...1Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/563/L1CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/575/354 : Young stellar objects in the NGC 1333 (Getman+, 2002)J/A+A/563/L3 : NGC1333-IRAS2A CALYPSO IRAM-PdBI SiO & SO maps (Codella+, 2014)J/A+A/563/L2 : NGC1333-IRAS2A CALYPSO IRAM-PdBI 1mm maps (Maury+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/563/L1https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/563/L1http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/563/L1https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/563/L1https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/563/L1http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/563/L1GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/563/L1/list (List of FITS files)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/563/L1/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/563/L1/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/563/L1/list?GETtext/xml+votable180.050000true52.2315631.243620.0055555555555555566/862https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/563/L1?format=asciiInfraredRadiodefaultJ/A+A/563/L1/listList of FITS filesrecnoRecord 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.mainScale[0.07/0.18] Scale of the imagearcsec/pixinstr.scalefloatNx[1024] Number of pixels along X-axispixmeta.numberintNy[1024] Number of pixels along Y-axispixmeta.numberintNz[16/32]? Number of images for data cubesmeta.numberintnullableFileNameName of FITS file in subdirectory fitsmeta.id;meta.fitscharfitsDonload the FITS data cubemeta.ref.urlcharTitleTitle of the filemeta.notechar