J/A+A/571/L4ivo://CDS.VizieR/J/A+A/571/L4doi:10.26093/cds/vizier.35719004CDSBeaz-Rubio A.Martin-Pintado J.Thum C.Planesas P.Torres-Redondo J.2018-07-17T13:21:56Z2014-11-10T08:46:03ZCDS support team

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

cds-question@unistra.frgalaxy-clustersgalaxiesphotometryccd-photometryThe UC-HII region of MWC 349A is the prototype of an ionized wind driven by a massive star surrounded by a disk. Recent high angular resolution observations of the millimeter recombination lines have shown that the disk rotates with a Keplerian law in its outer parts. However, the kinematics of innermost regions in the UC-HII region of MWC 349A is still unknown, in particular the radius where the wind is launched from the disk. We performed hydrogen recombination line observations with the Heterodyne Instrument for the Far Infrared (HIFI) onboard the Herschel Space Observatory to study the kinematics of its innermost regions by studying their spectral features. In addition to the two laser peaks, we report the first detection of two new components that are blueshifted with respect to the laser peaks for all the recombination lines with principal quantum number n<22. These new spectral features originate from the region where the wind is ejected from the disk. We used our 3D non-LTE radiative transfer model for recombination lines (MORELI) to show that these features are consistent with the wind being ejected at a radius of about 24 AU from the star, which supports magnetohydrodynamic wind models.2014A&A...571L...4Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/571/L4CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/571/L4https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/571/L4http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/571/L4https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/571/L4https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/571/L4http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/571/L4GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/571/L4/list (List of FITS spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/571/L4/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/571/L4/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/571/L4/list?GETtext/xml+votable180.050000true308.1897140.660170.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/571/L46/14692https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/571/L4?format=asciidefaultJ/A+A/571/L4/listList of FITS spectraTitleTitle of the filemeta.title;meta.filerecnoRecord 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.mainNx[642/8273] Number of pixels along X-axismeta.numberintObsDateObservation date (YYYY-MM-DDThh:mm:ss:sss)stime.epoch;obsnullableFreq[507/1770] Line frequencyGHzem.freqdoublebVel[-1902/-200] Lower value of velocity windowkm/sphys.velocfloatBVel[130/800] Upper value of velocity windowkm/sphys.velocfloatdVel[0.08/1] Velocity spacing (channel width)km/sphys.velocfloatsize[8/39] Size of FITS fileKibytephys.size;meta.fitsintfitsDownload the FITS filemeta.ref.urlcharspShow the spectrummeta.ref.urlcharFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharAssocDataAssociated Data web pagemeta.bib.pagechar