J/ApJ/525/420ivo://CDS.VizieR/J/ApJ/525/420doi:10.26093/cds/vizier.15250420CDSGies D.R.Kambe E.Josephs T.S.Bagnuolo W.G.Choi Y.J.Gudehus D.,Guyton K.M.Hartkopf W.I.Hildebrand J.L.Kaye A.B.Mason B.D.,Riddle R.L.Sowers J.W.Turner N.H.Wilson J.W.Xiong Y.2023-04-21T15:35:56Z2000-05-18T20:42:35ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starsspectroscopyultraviolet-astronomyearly-type-starsvariable-starsThe rapid variable star, {epsilon} Per (B0.5 IV-III), displays the largest amplitude profile fluctuations known among the growing number of massive, spectrum-variable stars. Here we present an analysis of a continuous 5 day run of IUE UV spectroscopy, and we show for the first time that the systematic, blue-to-red moving patterns observed in high-quality optical spectra are also present in the UV photospheric lines. We present cross-correlation functions of the individual spectra with that of a narrow-lined standard that produce a high signal-to-noise ratio representation of the blue-to-red moving bump patterns found in individual lines. We then use time series analysis methods to determine the periodic components of the profile variations (after reregistering the spectra to correct for binary motion). There are at least six periods present (ranging from 8.46 to 2.27 hr), and most of these signals are also found in optical line variations observed in 1986 (although the relative amplitudes have changed significantly). Furthermore, analysis of a shorter time series of IUE spectra from 1984 shows that similar periods were present then. We also present H{alpha} and He I 6678 profiles obtained with the Georgia State University Multi-Telescope Telescope, which were made simultaneously with IUE, and we show that the profile variations are essentially identical in the UV and optical ranges.1999ApJ...525..420Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/525/420CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/525/420https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/525/420http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/525/420https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/525/420https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/525/420http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/525/420GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapIUEUVdefaultJ/ApJ/525/420/table2Multi-Telescope Telescope radial velocity measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian datedtime.epochdoubleValphaRadial velocity of H{alpha}km/sspect.dopplerVeloc;spect.linefloatVHeIRadial velocity of He I 6678{AA}km/sspect.dopplerVelocfloatVrFinal mean radial velocitykm/sspect.dopplerVeloc;stat.meanfloatJ/ApJ/525/420/table1International Ultraviolet Explorer radial velocity measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSWPThe IUE SWP camera image numbermeta.id;meta.mainintJDJulian datedtime.epochdoubleVrFinal radial velocitykm/sspect.dopplerVelocfloat