J/A+A/559/A87ivo://CDS.VizieR/J/A+A/559/A87doi:10.26093/cds/vizier.35590087CDSZamanov R.Stoyanov K.Marti J.Tomov N.A.Belcheva G.,Luque-Escamilla P.L.Latev G.2017-03-15T06:45:24Z2013-11-20T08:32:16ZCDS support team

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

cds-question@unistra.frx-ray-binary-starsspectroscopyline-intensitiesradial-velocityWe report 137 spectral observations of the H{alpha} emission line of the radio- and gamma-ray-emitting Be/X-ray binary LSI+61 303 obtained during the period of September 1998 - January 2013. From measuring various H{alpha} parameters, we found that the orbital modulation of the H{alpha} is best visible in the equivalent width ratio EW(B)/EW(R), the equivalent width of the blue hump, and in the radial velocity of the central dip. The periodogram analysis confirmed that the H{alpha} emission is modulated with the orbital and superorbital periods. For the past 20 years the radius of the circumstellar disk is similar to the Roche lobe size at the periastron. It is probably truncated by a 6:1 resonance. The orbital maximum of the equivalent width of H{alpha} emission peaks after the periastron and coincides on average with the X-ray and gamma-ray maxima.2013A&A...559A..87Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/559/A87CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/656/437 : LSI+61 303 radial velocities and Halpha EW (Grundstrom+, 2007)J/ApJ/698/514 : Radial velocities of LSI+61 303 and LS 5039 (Aragona+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/559/A87https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/559/A87http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/559/A87https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/559/A87https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/559/A87http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/559/A87GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapAssociated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/559/A87OpticaldefaultJ/A+A/559/A87/table1H{alpha} emission line of LSI+61 303S/NSignal-to-noise ratiostat.snrintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintspecIDSpectrum identificationmeta.id;obscharspPlot of spectrummeta.ref.urlcharJDJulian Date of observationdtime.epochdoubleTexpExposure timemintime.duration;obs.exposureintEWTotal equivalent width of the H{alpha} emission0.1nmspect.line.eqWidth;em.line.HalphafloatHRV(cd)? Central dip heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatnullableHRV(R)? Red hump heliocentric radial velocitykm/sspect.dopplerVeloc;em.opt.R;pos.heliocentricfloatnullableHRV(B)? Blue hump heliocentric radial velocitykm/sspect.dopplerVeloc;em.opt.BfloatnullableB/R? Ratio between the EW of blue and red humpsspect.line.intensity;arith.ratiofloatnullableI(B)? Intensity of the blue peakphot.count;em.optfloatnullableI(R)? Intensity of the red peakphot.count;em.optfloatnullableI(cd)? Intensity of the central depressionphot.count;em.optfloatnullableRV(HeI)? HeI6678 absorption line radial velocitykm/sspect.dopplerVelocfloatnullablefitsDownload the FITS spectrummeta.ref.urlcharFileNameName of the fits file in subdirectory spmeta.id;meta.fitscharAssocDataAssociated Data web pagemeta.bib.pagechar