J/A+A/680/A89ivo://CDS.VizieR/J/A+A/680/A89doi:10.26093/cds/vizier/bc-n8/lijCDSCseh B.Csornyei G.Szabados L.Csak B.Kovacs J.Kriskovics L.Pal A.2026-07-03T06:35:45Z2023-12-15T09:59:49ZCDS support team

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

cds-question@unistra.frorbitsvariable-starsradial-velocityvisible-astronomyspectroscopyBinary Cepheids play an important role in investigating the calibration of the classical Cepheid period-luminosity relationship. Therefore a thorough study of individual Cepheids belonging to binary systems is necessary. Our aim is to determine the orbit of the binary system V1344 Aql using newly observed and earlier published spectroscopic and photometric data. We collected new radial velocity observations using medium resolution (R~11000 and R~<20000) spectrographs and we updated the pulsation period of the Cepheid based on available photometric observations using O-C diagram. Separating the pulsational and orbital radial velocity variations for each observational season (year), we determined the orbital solution for the system using chi^2^ minimisation. The updated pulsation period of the Cepheid estimated for the epoch of HJD 2458955.83 is 7.476826 days. We determined orbital elements for the first time in the literature. The orbital period of the system is about 34.6 years, with an eccentricity e=0.22.2023A&A...680A..89Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/680/A89CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/680/A89https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/680/A89http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/680/A89https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/680/A89https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/680/A89http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/680/A89GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/680/A89/list (List of fits spectra)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/680/A89/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/680/A89/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/680/A89/list?GETtext/xml+votable180.050000true287.99654174.35483330.0055555555555555566/30504https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/680/A89?format=asciiOpticaldefaultJ/A+A/680/A89/table1New radial velocity data for V1344 AqlrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBaricentric Julian Datedtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVUncertainty in radial velocitykm/sstat.errorfloatJ/A+A/680/A89/table2Gamma-velocities for V1344 AqlvgammaGamma-velocitykm/sphys.velocfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJDBaricentric Julian Datedtime.epochinte_vgammaGamma-velocity uncertaintykm/sstat.errorfloatNRVNumber of radial velocity data pointsmeta.numberintRefSource of data (1)meta.bibintJ/A+A/680/A89/table3New orbital parameters for V1344 AqlrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintasiniProjected length of the semi-major axis1e+06kmsrc.morph.scLengthinte_asiniUncertainty in a*sin(i)1e+06kmstat.errorinteEccentricitysrc.orbital.eccentricityfloate_eUncertainty in eccentricitystat.errorfloatomegaArgument of periastronradsrc.orbital.periastronfloate_omegaUncertainty in argument of periastronradstat.errorfloatT0Time of periastron passagedsrc.orbital.periastroninte_T0Uncertainty in time of periastron passagedstat.errorintPorbOrbital perioddtime.periodinte_PorbUncertainty in orbital perioddstat.errorintv0Systemic velocitykm/sphys.velocfloate_v0Uncertainty in systemic velocitykm/sstat.errorfloatKSemi-amplitudekm/ssrc.var.amplitudefloate_KUncertainty in semi-amplitudekm/sstat.errorfloatf(m)Mass functionsolMassphys.massfloate_f(m)Uncertainty in mass functionsolMassstat.errorfloatJ/A+A/680/A89/tablea1Obtained O-C values along with the source data referencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHJDHeliocentric Julian Datedtime.epochdoubleEpochEpochtime.epochfloatO-CmedMedian O-C valuedtime;arith.difffloate_O-CmedUncertainty in O-Cdstat.errorfloatRefReference (1)meta.ref;pos.frameintJ/A+A/680/A89/listList of fits spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Simbad right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Simbad declination sign (J2000)pos.eq.dec;meta.mainNxNumber of pixels along X-axismeta.numberintObs.dateObservation datestime.epoch;obsnullableblambdaLower value of wavelength interval0.1nmem.wlfloatBlambdaUpper value of wavelength interval0.1nmem.wlfloatdlambdaWavelength resolution0.1nmspect.resolutiondoublesizeSize of FITS fileKibytephys.size;meta.fitsintspShow the spectrummeta.ref.urlcharFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar