J/A+A/671/A139ivo://CDS.VizieR/J/A+A/671/A139doi:10.26093/cds/vizier.36710139CDSPavlovski K.Southworth J.Tkachenko A.Van Reeth A.Tamajo E.2024-11-28T20:02:33Z2023-03-16T09:00:10ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsphotometryvisible-astronomyThe surface chemical compositions of stars are affected by physical processes which bring the products of thermonuclear burning to the surface. Despite their potential in understanding the structure and evolution of stars, elemental abundances are available for only a few high-mass binary stars. We aim to enlarge this sample by determining the physical properties and photospheric abundances for four eclipsing binary systems containing high-mass stars: V1034 Sco, GL Car, V573 Car and V346 Cen. The components have masses 8 too 17M_{sun}_ and effective temperatures from 22500 to 32200K, and are all on the main sequence. We present new high-resolution and high signal-to-noise spectroscopy from High Accuracy Radial velocity Planet Searcher (HARPS), and analyse them using spectral disentangling and non-local thermodynamic equilibrium (NLTE) spectral synthesis. We model existing light curves and new photometry from the Transiting Exoplanet Survey Satellite (TESS). We measure the stellar masses to 0.6 to 2.0% precision, radii to 0.8 to 1.7% precision, effective temperatures to 1.1 to 1.6% precision, and abundances of C, N, O, Mg and Si. The abundances are similar to those found in our previous studies of high-mass eclipsing binaries; our sample now comprises 25 high-mass stars in 13 binary systems. We also find tidally-excited pulsations in V346 Cen. We reinforce our previous conclusions: interior chemical element transport is not as efficient in binary star components as in their single-star counterparts in the same mass regime and evolutionary stage, possibly due to the effects of tidal forces. Our ultimate goal is to provide a larger sample of OB-type stars in binaries which would enable a thorough comparison to stellar evolutionary models, as well as to single high-mass stars.2023A&A...671A.139Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/671/A139CatalogResearchIsServedByTAP VizieR generic servicerelated-toIV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/671/A139https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/671/A139http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/671/A139https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/671/A139https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/671/A139http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/671/A139GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap3.322582951404819e-19 3.852589004194616e-19OpticaldefaultJ/A+A/671/A139/table1Basic characteristics of the binary systems studied in this workSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTargetGCVS name of the target eclipsing binarymeta.id;meta.maincharONameOther namemeta.idcharPorbOrbital perioddtime.periodfloatVmaxMaximum V magnitudemagphot.mag;em.opt.VfloatSpTypeSpectral typessrc.spTypecharAgeAgeMyrtime.agecharMembCluster membershipmeta.code.membercharPaps? Apsidal periodyrtime.periodfloatnullablee_Paps? Apsidal period erroryrstat.errorfloatnullableLCShow the light curvemeta.ref.urlcharJ/A+A/671/A139/tablea1Differential photometry of the target eclipsing binaries from TESSrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTargetGCVS name of the target eclipsing binarymeta.id;meta.maincharSectorTESS sector the measurement was obtained duringobs.fieldintBJDBarycentric Julian Date for the midpoint of observation (TDB)dtime.epochdoubleindexedmagDifferential TESS-band magnitudemagphot.mag;arith.diffdouble