J/A+A/367/86ivo://CDS.VizieR/J/A+A/367/86doi:10.26093/cds/vizier.33670086CDSSmartt S.J.Venn K.A.Dufton P.L.Lennon D.J.Rolleston W.R.J.,Keenan F.P.2001-02-13T06:37:55Z2001-02-13T07:37:26ZCDS support team

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

cds-question@unistra.frearly-type-starsline-intensitiesHigh-resolution, high signal-to-noise spectral data are presented for four young B-type stars lying towards the Galactic Centre. Determination of their atmospheric parameters from their absorption line profiles, and uvby photometric measurement of the continua indicate that they are massive objects lying slightly out of the plane, and were probably born in the disk between 2.5-5kpc from the Centre. We have carried out a detailed absolute and differential line-by-line abundance analyses of the four stars compared to two stars with very similar atmospheric parameters in the solar neighbourhood. The stars appear to be rich in all the well sampled chemical elements (C, N, Si, Mg, S, Al), except for oxygen. Oxygen abundances derived in the atmospheres of these four stars are very similar to that in the solar neighbourhood. If the photospheric composition of these young stars is reflective of the gaseous ISM in the inner Galaxy, then the values derived for the enhanced metals are in excellent agreement with the extrapolation of the Galactic abundance gradients previously derived by Rolleston et al. (2000A&A...363..537R) and others. However, the data for oxygen suggests that the inner Galaxy may not be richer than normal in this element, and the physical reasons for such a scenario are unclear.2001A&A...367...86Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/367/86CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/275/101 : Chemical evolution of the galactic disk I. (Edvardsson+ 1993)J/A+AS/102/603 : Chemical evolution of the galactic disk II. (Edvardsson+ 1993)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/367/86https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/367/86http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/367/86https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/367/86https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/367/86http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/367/86GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/367/86/table9Equivalent widths of the non-diffuse helium lines and the metal lines in the stars LS5130, LS4419, LS4784 and the spectroscopic standard {gamma} PegrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonAtomic speciephys.atmol.elementcharlineLaboratory wavelength of the transition0.1nmem.wl;phys.atmol.transitionfloatEWLS5130? LS5130 equivalent widthpmspect.line.eqWidthfloatnullableu_EWLS5130[a-c] Flag for error on EWLS5130 (1)meta.code.errorcharEWLS4419? LS4419 equivalent widthpmspect.line.eqWidthfloatnullableu_EWLS4419[a-c] Flag for error on EWLS4419 (1)meta.code.errorcharn_EWLS4419? Note on EWLS4419 (2)meta.noteintnullableEWLS4784? LS4784 equivalent widthpmspect.line.eqWidthfloatnullableu_EWLS4784[a-c] Flag for error on EWLS4784 (1)meta.code.errorcharn_EWLS4784? Note on EWLS4784 (2)meta.noteintnullableEWgamPeg? gamma-Peg equivalent widthpmspect.line.eqWidthfloatnullableu_EWgamPeg[a-c] Flag for error on EWgamPeg (1)meta.code.errorcharJ/A+A/367/86/table10Equivalent widths of the non-diffuse helium lines and the metal lines in the stars LS5127 and the spectroscopic standard iota-HerIonAtomic speciephys.atmol.elementcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlineLaboratory wavelength of the transition0.1nmem.wl;phys.atmol.transitionfloatEWLS5127? LS5127 equivalent widthpmspect.line.eqWidthfloatnullableu_EWLS5127[a-c] Flag for error on EWLS5127 (1)meta.code.errorcharEWiotaHer? {iota} Her equivalent widthpmspect.line.eqWidthfloatnullableu_EWiotaHer[a-c] Flag for error on EWiotaHer (1)meta.code.errorchar