J/ApJ/656/431ivo://CDS.VizieR/J/ApJ/656/431doi:10.26093/cds/vizier.16560431CDSGrundstrom E.D.Blair J.L.Gies D.R.Huang W.McSwain M.V.,Raghavan D.Riddle R.L.Subasavage J.P.Wingert D.W.Levine A.M.,Remillard R.A.2017-06-02T08:37:21Z2009-01-31T20:04:54ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starsx-ray-binary-starsradial-velocityline-intensitiesWe report on a 3yr spectroscopic monitoring program of the Halpha emission in the massive X-ray binary LS I +65 010 = 2S 0114+650, which consists of a B supergiant and a slowly rotating X-ray pulsar. We present revised orbital elements that yield a period of P=11.5983+/-0.0006days and confirm that the orbit has a nonzero eccentricity e=0.18+/-0.05. The Halpha emission profile is formed in the base of the wind of the B supergiant primary, and we show how this spectral feature varies on timescales that are probably related to the rotational period of the B supergiant. We also examine the X-ray fluxes from the Rossi X-ray Timing Explorer All-Sky Monitor instrument, and we show that the X-ray orbital light curve has a maximum at periastron and a minimum at the inferior conjunction of the B supergiant. We also show that the wind emission strength and the high-energy X-ray flux appear to vary in tandem on timescales of approximately 1yr.2007ApJ...656..431Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/656/431CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/656/437 : LS I +61 303 radial velocities & Halpha EW (Grundstrom+, 2007)J/ApJ/660/1398 : HDE 245770 & X Per RV & Halpha EW (Grundstrom+, 2007)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/656/431https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/656/431http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/656/431https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/656/431https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/656/431http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/656/431GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/656/431/table2Radial velocity and equivalent width measurementsPhaseOrbital phasetime.phasefloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDMid-point Heliocentric Julian Datedtime.epochdoubleRVRadial velocity (1)km/sspect.dopplerVeloc;pos.heliocentricfloatf_RV[a] Flag on RV (2)meta.codechar(O-C)Observed minus calculated residual from the fitkm/sstat.fit.residualfloatDelV? Measured velocity difference of 6613{AA} ISM line from its position in template spectrumkm/sphys.veloc;arith.difffloatnullableEWHaH{alpha} equivalent width in Angstroms0.1nmspect.line.eqWidth;em.line.Halphafloat