J/A+A/483/839ivo://CDS.VizieR/J/A+A/483/839doi:10.26093/cds/vizier.34830839CDSBujarrabal V.Young K.Fong D.2017-06-19T07:57:19Z2008-06-30T17:16:02ZCDS support team

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

cds-question@unistra.frnebulaepre-main-sequence-starsco-line-emissionWe study the nature of Gomez's Hamburger (IRAS 18059-3211), a nebula that has been proposed to be a post-AGB object. Such a classification has not been confirmed; instead, we argue that it will be a key object in the study of disks rotating around young stars. We present high-resolution SMA maps of CO J=2-1 (230.538GHz) in Gomez's Hamburger. The data are analyzed by means of a code that simulates the emission of a nebula showing a variety of physical conditions and kinematics. Our observations clearly show that the CO emitting gas in Gomez's Hamburger forms a spectacular disk in keplerian rotation. Model calculations undoubtedly confirm this result. The central (mainly stellar) mass is found to be high, ~4 solar masses for a distance of 500pc. The mass and (relatively low) luminosity of the source are, independent of the assumed distance, very different from those possible in evolved stars. This object is probably transitional between the pre-MS and MS phases, still showing interstellar material around the central star or stellar system.2008A&A...483..839Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/483/839CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/483/839https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/483/839http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/483/839https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/483/839https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/483/839http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/483/839GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapRadiodefaultJ/A+A/483/839/mapsMaps listrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFileNameName of the file in subdirectory fitsmeta.id;meta.filecharTitleTitle and characteristics of the filemeta.notechar