J/A+A/446/583ivo://CDS.VizieR/J/A+A/446/583doi:10.26093/cds/vizier.34460583CDSLibich J.Harmanec P.Vondrak J.Yang S.Hadrava P.Aerts C.,De Cat P.Koubsky P.Skoda P.Slechta M.Uytterhoeven K.Mathias P.2017-06-13T11:09:26Z2009-09-20T09:46:02ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starsradial-velocityA detailed analysis of a large collection of electronic spectra from three observatories, together with radial velocities published earlier, were used to derive a new ephemeris and improved orbital elements for the eps Per binary. Observations covering a time interval of about 37000-days (101.3-years) can be reconciled with a constant orbital period of (14.0691+/-0.00004)-days. The high orbital eccentricity of 0.555+/-0.009 was also confirmed. New spectral observations confirm that there is a periodic variation of the systemic velocity. Together with new evidence from astrometric observations (also analyzed here), they confirm the existence of a third body in the system with an orbital period of about 9600-days (26.3-years), rather than 4156-days, as reported earlier. Application of the disentangling technique to the H alpha spectra with good S/N ratios did not allow detection of spectral lines of either the secondary or tertiary components. For plausible inclinations between 30 and 90 {deg}, the observed mass function implies a mass of the secondary M_2_=0.85-1.77M_{sun}_, if a primary mass is adopted of (13.5+/-2.0)M_{sun}_. Attempts to detect the third body via interferometric observations should continue in spite of this first negative result.2006A&A...446..583Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/446/583CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/525/420 : UV and optical line variations in eps Persei (Gies+, 1999)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/446/583https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/446/583http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/446/583https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/446/583https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/446/583http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/446/583GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/446/583/table1Journal of all RVs of epsilon Persei primaryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJDModified Julian date (JD-2400000.5)dtime.epochdoubleRVRadial velocity of primary of epsilon Perseikm/sspect.dopplerVeloc;pos.heliocentricfloatRefData source number (in refs.dat file)meta.id;meta.mainintRem[x] x: excluded from orbital solutionsmeta.notecharJ/A+A/446/583/refsSource listrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefSource numbermeta.id;meta.mainintprimaryNoteText of the notemeta.notechar