J/A+A/610/A17ivo://CDS.VizieR/J/A+A/610/A17doi:10.26093/cds/vizier.36100017CDSLampens P.Fremat Y.Vermeylen L.Sodor A.Skarka M.De Cat P.,Bognar Zs.De Nutte R.Dumortier L.Escorza A.Oomen G.M.,Van de Steene G.Kamath D.Laverick M.Samadi A.Triana S.Lehmann H.2018-12-05T12:59:05Z2018-02-13T07:27:07ZCDS support team

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

cds-question@unistra.frvariable-starsspectroscopic-binary-starsradial-velocityHundreds of candidate hybrid pulsators of intermediate type A-F were revealed by recent space missions. Hybrid pulsators allow us to study the full stellar interiors, where both low-order p- and high-order g-modes are simultaneously excited. The true hybrid stars must be identified since other processes, related to stellar multiplicity or rotation, might explain the presence of (some) low frequencies observed in their periodograms. We measured the radial velocities of 50 candidate delta Scuti - gamma Doradus hybrid stars from the Kepler mission with the Hermes and Ace spectrographs over a time span of months to years. We aim to derive the fraction of binary and multiple systems and to provide an independent and homogeneous determination of the atmospheric properties and v.sini for all targets. The long(er)-term objective is to identify the (probable) physical cause of the low frequencies. We computed one-dimensional cross-correlation functions (CCFs) in order to find the best set of parameters in terms of number of components, spectral type(s), and v.sini for each target. Fundamental parameters were determined by fitting (composite) synthetic spectra to the normalised median spectra corrected for the appropriate Doppler shifts. We report on the analysis of 478 high-resolution Hermes and 41 Ace spectra of A/F-type candidate hybrid pulsators from the Kepler field. We determined their radial velocities, projected rotational velocities, and atmospheric properties and classified our targets based on the shape of the CCFs and the temporal behaviour of the radial velocities. We derived orbital solutions for seven new systems. Three preliminary long-period orbital solutions are confirmed by a photometric time-delay analysis. Finally, we determined a global multiplicity fraction of 27 percent in our sample of candidate hybrid stars.2018A&A...610A..17Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/610/A17CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/133 : Kepler Input Catalog (Kepler Mission Team, 2009)J/AJ/149/68 : A-F type variable stars from Kepler (Bradley+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/610/A17https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/610/A17http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/610/A17https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/610/A17https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/610/A17http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/610/A17GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/610/A17/tablec1 (Classification, model parameters and atmospheric stellar parameters obtained from the Hermes spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/610/A17/tablec1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/610/A17/tablec1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/610/A17/tablec1?GETtext/xml+votable180.050000true285.902958338.20227780.0055555555555555566/14580 14585-14586 14730 14733 14735 14752-14753 14756 14758 14760 14762 14766 14770 14775 14779 14794 14818 14830 14918 14920 14936 14938 14941 14946 14950-14951 14956 14961 14969 14971 15104-15105 15107 15118 15121-15123 15127 15129 15136 15140 15148-15149 15154https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/610/A17?format=asciidefaultJ/A+A/610/A17/tablec1Classification, model parameters and atmospheric stellar parameters obtained from the Hermes spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintVCShow the Radial Velocity curvesmeta.ref.urlcharKICKepler Identifiermeta.id;meta.mainintRAJ2000Rigth ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainPerPeriod from KICdtime.perioddoubleSpTypeSpectral typesrc.spTypecharTeffKIC? Effective temperature from KICKphys.temperature.effectiveintnullableloggKIC? Logarithmic gravity from KIClog(cm.s**-2)phys.gravityfloatnullableKpmagKepler magnitudemagphot.mag;em.optfloatHNumber of Hermes/Ace spectrameta.numberintComComments (1)meta.notecharCatClassification typemeta.notecharParamModParameters of the synthetic spectrummeta.id;stat.fit.paramcharTeffMean? Mean effective temperatureKphys.temperature.effective;stat.meanintnullablel_loggMean[><= ] Limit flag on loggMeanmeta.code.errorcharloggMean? Mean logarithmic gravity or lower value of mean logarithmic gravity intervallog(cm.s**-2)phys.gravity;stat.meanfloatnullableloggMeanM? Upper value of mean logarithmic gravity intervallog(cm.s**-2)phys.gravity;stat.mean;stat.maxfloatnullableTeffGIR? Effective temperature from GIRFITKphys.temperature.effectiveintnullableloggGIR? Logarithmic gravity from GIRFITlog(cm.s**-2)phys.gravityfloatnullablevsiniGIR? Projected rotation velocity from GIRFITkm/sphys.veloc.rotatintnullableNoteNotemeta.notecharFileNameName of the table with radial velocity datameta.id;meta.tablecharKeplerDisplay the KIC (Cat. V/133) datameta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/610/A17/tablec2Comparison of atmospheric stellar parameters obtained in this work with published values (assuming other parameters are equivalent)SpTypeSpectral typesrc.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKepler Identifiermeta.id;meta.mainintTeffKICEffective temperature from KICKphys.temperature.effectiveintloggKICLogarithmic gravity from KIClog(cm.s**-2)phys.gravityfloatKpmagKepler magnitudemagphot.mag;em.optfloatCatClassification typemeta.notecharTeffMean? Mean effective temperatureKphys.temperature.effective;stat.meanintnullablel_loggMean[<>= ] Limit flag on loggMeanmeta.code.errorcharloggMean? Mean logarithmic gravity or lower value of mean logarithmic gravitylog(cm.s**-2)phys.gravity;stat.meanfloatnullableloggMeanM? Upper value of mean logarithmic gravitylog(cm.s**-2)phys.gravity;stat.mean;stat.maxfloatnullableTeffGIREffective temperature from GIRFITKphys.temperature.effectiveintloggGIRLogarithmic gravity from GIRFITlog(cm.s**-2)phys.gravityfloatvsiniGIRProjected rotation velocity from GIRFITkm/sphys.veloc.rotatintTefflitEffective temperature from literatureKphys.temperature.effectiveintlogglitLogarithmic gravity from literaturelog(cm.s**-2)phys.gravityfloatvsinilitProjected rotation velocity from literaturekm/sphys.veloc.rotatintSourceReference from literature (1)meta.ref;pos.framecharJ/A+A/610/A17/tablec3Comparison of atmospheric stellar parameters obtained in this work with the LAMOST results based on the ROTFIT procedurerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKepler Identifiermeta.id;meta.mainintSpTypeSpectral typesrc.spTypecharTeffKIC? Effective temperature from KICKphys.temperature.effectiveintnullableloggKIC? Logarithmic gravity from KIClog(cm.s**-2)phys.gravityfloatnullableKpmagKepler magnitudemagphot.mag;em.optfloatCatClassification typemeta.notecharTeffGIREffective temperature from GIRFITKphys.temperature.effectiveintloggGIRLogarithmic gravity from GIRFITlog(cm.s**-2)phys.gravityfloatn_loggGIR[*] Note on loggGIR (1)meta.notecharvsiniGIRProjected rotation velocity from GIRFITkm/sphys.veloc.rotatintn_vsiniGIR[*] Note on vsiniGIR (1)meta.notecharSpTypeLamSpectral type from LAMOSTsrc.spTypecharTeffRotEffective temperature from ROTFITKphys.temperature.effectiveinte_TeffRotrms uncertainty on TeffRotKstat.errorintloggRotLogarithmic gravity from ROTFITlog(cm.s**-2)phys.gravityfloate_loggRotrms uncertainty on loggRotlog(cm.s**-2)stat.errorfloat[Fe/H]RotMetallicity from ROTFITphys.abund.Fefloate_[Fe/H]Rotrms uncertainty on [Fe/H]Rotstat.error;phys.abund.FefloatRVRotRadial velocity from ROTFITkm/sphys.veloc;pos.heliocentricfloate_RVRotrms uncertainty on RVRotkm/sstat.errorfloatvsiniRot? Projected rotation velocity from ROTFITkm/sphys.veloc.rotatintnullablee_vsiniRot? rms uncertainty on vsiniRotkm/sstat.errorintnullableJ/A+A/610/A17/table2List of radial velocity data used in this work. I. Single objects and single-lined systemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKepler Identifiermeta.id;meta.mainintHJDHeliocentric Julian Datedtime.epochdoubleRV1Radial velocitykm/sspect.dopplerVelocfloate_RV1Radial velocity uncertaintykm/sstat.errorfloatSource[1/2] Source (G1)meta.bibintJ/A+A/610/A17/table3List of radial velocity data used in this work. II. Double- and triple-lined systemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintKICKepler Identifiermeta.id;meta.mainintHJDHeliocentric Julian Datedtime.epochdoubleRV1Radial velocity, primary componentkm/sspect.dopplerVelocfloate_RV1Radial velocity uncertaintykm/sstat.errorfloatRV2Radial velocity, secondary componentkm/sspect.dopplerVelocfloate_RV2Radial velocity uncertaintykm/sstat.errorfloatRV3? Radial velocity, tertiary componentkm/sspect.dopplerVelocfloatnullablee_RV3? Radial velocity uncertaintykm/sstat.errorfloatnullableSource[1/2] Source (G1)meta.bibint