J/A+A/312/879ivo://CDS.VizieR/J/A+A/312/879doi:10.26093/cds/vizier.33120879CDSHarmanec P.Morand F.Bonneau D.Jiang Y.Yang S.Guinan E.F.,Hall D.S.Mourard D.Hadrava P.Bozic H.Sterken C.Tallon-Bosc I.,Walker G.A.H.McCook G.P.Vakili F.Stee P.Le Contel J.M.1999-02-05T06:39:41Z1999-02-05T07:39:24ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsradial-velocityvisible-astronomybroad-band-photometryA preliminary analysis of an extensive collection of interferometric, spectroscopic and photometric observations of the bright Be star {beta} Lyr lead to the following main conclusions: (1) The bulk of the H{alpha} and He I 6678 emission seems to originate in jets of material perpendicular to the orbital plane of the binary. The jets are associated with the more massive component of the binary (star 1) and probably emanate from the `hot spot' in the disk, i.e. the region of interaction of the gas stream flowing from the Roche-lobe filling B6-8II component (star 2) toward star 1. Some contribution to the emission also comes from a region located between the two stars (the gas stream and the `hot spot') and from the `pseudoatmosphere' of the accretion disk around star 1. (2) The 282-d cyclic variation of the light curve of {beta} Lyr is confirmed on the basis of 2852 homogenized V-band observations covering an interval of 36yrs. We find, however, that the amplitude and phase of these variations vary with the orbital phase: the long-term modulation of the light curve almost disappears near orbital phases 0.25P and 0.50P (elongation and secondary eclipse). (3) Pronounced line-profile variations of the H{alpha} and He I 6678 lines on a time scale shorter than one orbital period were clearly detected. They may be periodic, with a period near 4.70-4.75d, and this periodicity may be related to the 282-d change via the orbital period.1996A&A...312..879Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/312/879CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/312/879https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/312/879http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/312/879https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/312/879https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/312/879http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/312/879GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/312/879/table2aBeta Lyr individual radial velocities of the H alpha line (Reticon Ondrejov)NoFile numbermeta.id;meta.fileintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric julian datedtime.epochdoublecycleCyclemeta.number;time.perioddoubleRVem? Radial velocity of emission wings (1)km/sphys.veloc;pos.heliocentricfloatnullableRVpV? Radial velocity of V (violet) peak (1)km/sphys.veloc;pos.heliocentricfloatnullableRVpR? Radial velocity of R (red) peak (1)km/sphys.veloc;pos.heliocentricfloatnullableRVabs? Radial velocity of absorption component (1)km/sphys.veloc;pos.heliocentricfloatnullableRVstar2Mean stellar velocity of star2km/sphys.veloc;pos.heliocentricfloatJ/A+A/312/879/table2bBeta Lyr individual radial velocities of the He I 6678 line (Reticon Ondrejov)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoFile numbermeta.id;meta.fileintHJDHeliocentric julian datedtime.epochdoublecycleCyclemeta.number;time.perioddoubleRVem? Radial velocity of emission wings (1)km/sphys.veloc;pos.heliocentricfloatnullableRVabs1? Radial vel. of peak main absorption (1)km/sphys.veloc;pos.heliocentricfloatnullableRVabs2? Radial vel. of peak main absorption (1)km/sphys.veloc;pos.heliocentricfloatnullableRVabs3? Radial vel. of peak main absorption (1)km/sphys.veloc;pos.heliocentricfloatnullableRVstar2? Mean stellar velocity of star2 (1)km/sphys.veloc;pos.heliocentricfloatnullableRVabs4? Radial vel. of other absorption (1)km/sphys.veloc;pos.heliocentricfloatnullableRVabs5? Radial vel. of other absorption (1)km/sphys.veloc;pos.heliocentricfloatnullableJ/A+A/312/879/table2cBeta Lyr individual radial velocities of the H alpha line (DAO CCD 4096 spectra)cycleCyclemeta.number;time.perioddoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNoFile numbermeta.id;meta.fileintHJDHeliocentric julian datedtime.epochdoubleRVem? Radial velocity of emission wings (1)km/sphys.veloc;pos.heliocentricfloatnullableRVpV? Radial velocity of V (violet) peak (1)km/sphys.veloc;pos.heliocentricfloatnullableRVpR? Radial velocity of R (red) peak (1)km/sphys.veloc;pos.heliocentricfloatnullableRVabs? Radial velocity of absorption component (1)km/sphys.veloc;pos.heliocentricfloatnullableRVstar2Mean stellar velocity of star2km/sphys.veloc;pos.heliocentricfloatJ/A+A/312/879/table2dBeta Lyr individual radial velocities of the He I 6678 line (DAO CCD 4096 spectra)HJDHeliocentric julian datedtime.epochdoubleNoFile numbermeta.id;meta.fileintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintcycleCyclemeta.number;time.perioddoubleRVeRadial velocity of emission wingskm/sphys.veloc;pos.heliocentricfloatRVpVRadial velocity of V peakkm/sphys.veloc;pos.heliocentricfloatRVpRRadial velocity of R peakkm/sphys.veloc;pos.heliocentricfloatRVabs1Radial velocity of absorption component 1km/sphys.veloc;pos.heliocentricfloatRVstar2? Mean stellar velocity of star2 (1)km/sphys.veloc;pos.heliocentricfloatnullableRVabs2? Radial vel. of absorption component 2 (1)km/sphys.veloc;pos.heliocentricfloatnullablesat.abs? Radial vel. of satellite absorption (1)km/sphys.velocfloatnullableJ/A+A/312/879/table4UBV observations of Beta Lyr, 8 Lyr and 9 LyrrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharHJDHeliocentric julian datedtime.epochdoublewWeight of the observationstat.weightfloatVmag? V magnitude (1)magphot.mag;em.opt.VfloatnullableBmag? B magnitude (1)magphot.mag;em.opt.BfloatnullableUmag? U magnitude (1)magphot.mag;em.opt.UfloatnullableB-V? B-V color (1)magphot.color;em.opt.B;em.opt.VfloatnullableU-B? U-B color (1)magphot.color;em.opt.U;em.opt.BfloatnullableHDcompName of the comparison starmeta.idintSiteSite (see note4 file)meta.id;instr.obstyint