J/A+A/306/924ivo://CDS.VizieR/J/A+A/306/924doi:10.26093/cds/vizier.33060924CDSBakker E.J.Van Der Wolf F.L.A.Lamers H.J.G.L.M.Gulliver A.F.,Ferlet R.Vidal-Madjar A.1997-12-09T16:39:10Z1997-12-09T17:39:06ZCDS support team

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

cds-question@unistra.frspectroscopyinfrared-astronomyHigh-resolution optical spectra (UES/WHT) of the extreme metal-poor post-AGB star HR 4049 were obtained at four different orbital phases. The spectra cover the wavelength region from 3650A to 10850A at a resolution of R=5.2x10^4^. These observations are supplemented with four high-resolution spectra of the NaI D1 & D2 and CaII K lines at R=~10^5^ (CAT/CES). The optical spectrum shows 217 spectral lines: the Balmer series (H{alpha} - H35), the Paschen series (P9 - P23), NI, OI and numerous CI lines. We show that the lines of H{alpha}, H{beta}, H{gamma} and NaI D show significant changes in profile between different observation dates. Nine components were identified in the profile of the NaI D lines of which three are circumstellar and six interstellar. The stronger CI lines are asymmetric and we derive a post-AGB mass-loss of {dot}(M)=6+/-4x10^-7^M_{sun}_/yr from the asymmetry. The [OI]6300A line has been detected in emission at the system velocity and we argue that the emission is from an almost edge-on disk with a radius of about 20R_*_. HR 4049 is at J2000 position: 00 42 45.8 - 20 21 361996A&A...306..924Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/306/924CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/336/263 : Radial velocities of HR 4049 (Bakker+ 1998), Paper II.Table 2: Log of the WHT/UES observations of HR 4049 (only the number of thehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/306/924https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/306/924http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/306/924https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/306/924https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/306/924http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/306/924GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/A+A/306/924/table11The line identification of HR 4049recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLamLab[]? Laboratory wavelength of the identified absorption line0.1nmem.wl;phys.atmol.transitiondoublen_run[*] When '*' the run code is not 3.1, 3.2 or 3.3 (6)meta.notecharMultipletElement and multiplet number of the given absorption linephys.atmol.levelcharChi[]? Lower level excitation energy of the transitioneVphys.energy;phys.atmol.excitationfloatlog(gf)[]? Oscillator strength of the transitionphys.atmol.wOscStrengthfloatLamObsObserved wavelength of the absorption feature (1)0.1nmem.wldoubleDepth[]? Observed depth of the central absorption relative to the continuum (2)%phot.flux.density;arith.ratiofloatEW[]? Observed equivalent width (3)pmspect.line.eqWidthfloatFWHM[]? Full-Width-Half-Maximum of the absorption feature (4)km/sspect.line.widthintHRV[]? Radial heliocentric velocity for the identified absorption feature (5)km/sphys.veloc;pos.heliocentricintrunRun code (6)meta.id;obsfloatq_LamLabQuality factor for the identification of the absorption feature (7)meta.code.qualintRemarksRemarks on the line identification (8)meta.notechar