J/A+AS/120/99ivo://CDS.VizieR/J/A+AS/120/99CDSJaschek M.Andrillat Y.Jaschek C.1997-12-09T18:24:21Z1997-12-09T19:24:17ZCDS support team

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

cds-question@unistra.frline-intensitiesinfrared-astronomyspectroscopyemission-line-starsWe analyse spectroscopic CCD material obtained at the Haute Provence Observatory. We provide identifications and equivalent width measurements in the wavelength region 3740-8790. About 350 emissions lines were measured and about 88 of them were identified. A comparison of our results with those of other authors is provided, as well as a table of elements identified in the spectrum of this star. The pattern of elements present is analogous to that of a late B-type star, but some exceptions are noted, such as the absence of Ne and Mg lines and the presence of K, Cu and Zr lines which appear usually in later type stars. We review the little which is known concerning this object and we also present a quantitative account of the variations in equivalent widths. The observations indicate that the spectrum is highly variable, so that in two different years only half of the lines appear on both spectra. Furthermore variations by at least a factor of two in the equivalent widths are present in many lines. The radial velocity derived from the emission lines (-76km/s) corresponds to that of the shell which probably has a velocity of about 50km/s with respect to the underlying star.1996A&AS..120...99Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/120/99CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/117/281 : B[e] stars. I. HD 51585 (= OY Gem)J/A+AS/118/495 : B[e] stars. II. MWC 349 AJ/A+AS/124/441 : B[e] stars. IV. MWC 142J/A+AS/128/475 : B[e] stars. V. MWC 158J/A+AS/131/479 : B[e] stars. VI. MWC 297https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/120/99https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/120/99http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/120/99https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/120/99https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/120/99http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/120/99GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/A+AS/120/99/table2Line identifications in the spectrum of MWC 645MatMaterial yeartime.epochintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintLambdaLaboratory wavelength0.1nmem.wl;phys.atmol.transitionfloatn_Lambda[&] & when coupled with the following Lambdameta.notecharSpectSpectrum identification (see table1)meta.notecharEW? Equivalent width of the line, for Spect (1)0.1nmspect.line.eqWidthfloatn_EWNote on EW (2)meta.notecharIdentLine identification of the order element ionization stage and multiplet number (3)meta.idchar