J/A+A/590/A122ivo://CDS.VizieR/J/A+A/590/A122doi:10.26093/cds/vizier.35900122CDSReig P.Nersesian A.Zezas A.Gkouvelis L.Coe M.J.2020-02-28T15:28:29Z2016-06-07T15:04:23ZCDS support team

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

cds-question@unistra.frx-ray-binary-starsspectroscopyHigh-mass X-ray binaries are bright X-ray sources. The high-energy emission is caused by the accretion of matter from the massive companion onto a neutron star. The accreting material comes from either the strong stellar wind in binaries with supergiant companions or the circumstellar disk in Be/X-ray binaries. In either case, the H{alpha} line stands out as the main source of information about the state of the accreting material. We present the results of our monitoring program to study the long-term variability of the H{alpha} line in high-mass X-ray binaries. Our aim is to characterise the optical variability timescales and study the interaction between the neutron star and the accreting material. We fitted the H{alpha} line with Gaussian profiles and obtained the line parameters and equivalent width. The peak separation in split profiles was used to determine the disk velocity law and estimate the disk radius. The relative intensity of the two peaks (V/R ratio) allowed us to investigate the distribution of gas particles in the disk. The equivalent width was used to characterise the degree of variability of the systems. We also studied the variability of the H{alpha} line in correlation with the X-ray activity.2016A&A...590A.122Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/590/A122CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/590/A122https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/590/A122http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/590/A122https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/590/A122https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/590/A122http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/590/A122GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/590/A122/table1 (Targets and relevant information)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/590/A122/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/590/A122/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/590/A122/table1?GETtext/xml+votable180.050000true19.511239265.29161920.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/590/A1226/1196 1796 3160 3308 3632 3687 3690 3728-3729 14057 14251 14410 14437 14677 15367 15639 24325 24451 30256 30618https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/590/A122?format=asciidefaultJ/A+A/590/A122/table1Targets and relevant informatione? Ellipticitysrc.ellipticityfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpec[*] indicates available spectrameta.codecharNameX-ray namemeta.id;meta.maincharSpTypeMK Spectral typesrc.spTypecharMMass (1)solMassphys.massfloatRadRadius (1)solRadphys.angSize;srcfloatPorb? Orbital perioddtime.periodfloatnullablen_Porb[?*] Note on Porb (3)meta.notecharE(B-V)Redenning (2)magphot.color.excessfloate_E(B-V)rms uncertainty on E(B-V)magstat.errorfloatDistDistance (2)kpcpos.distancefloate_Distrms uncertainty on Distkpcstat.errorfloatDloss[yes/no ] Disk loss ?meta.codecharRefReferences for Porb and emeta.refcharSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/590/A122/listList of spectraNameX-ray namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs.DateObservation datetime.epoch;obsnullablespShow the spectrummeta.ref.urlcharFileNameFilename of spectrum fits file, in subdirectory spmeta.id;meta.filecharAssocDataAssociated Data web pagemeta.ref.urlchar