J/AJ/146/70ivo://CDS.VizieR/J/AJ/146/70doi:10.26093/cds/vizier.51460070CDSRucinski S.M.Pribulla T.Budaj J.2017-06-21T08:21:54Z2014-07-31T15:12:25ZCDS support team

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

cds-question@unistra.freclipsing-binary-starsinterstellar-reddeningchemical-abundancesradial-velocityproper-motionsThis study is the first attempt to determine the metallicities of W UMa-type binary stars using spectroscopy. We analyzed about 4500 spectra collected at the David Dunlap Observatory. To circumvent problems caused by the extreme spectral line broadening and blending and by the relatively low quality of the data, all spectra were subject to the same broadening function (BF) processing to determine the combined line strength in the spectral window centered on the Mg I triplet between 5080{AA} and 5285{AA}. All individual integrated BFs were subsequently orbital-phase averaged to derive a single line-strength indicator for each star. The star sample was limited to 90 W UMa-type (EW) binaries with the strict phase-constancy of colors and without spectral contamination by spectroscopic companions. The best defined results were obtained for an F-type sub-sample (0.32<(B-V)_0_<0.62) of 52 binaries for which integrated BF strengths could be interpolated in the model atmosphere predictions. The logarithmic relative metallicities, [M/H], for the F-type sub-sample indicate metal abundances roughly similar to the solar metallicity, but with a large scatter which is partly due to combined random and systematic errors. Because of the occurrence of a systematic color trend resulting from inherent limitations in our approach, we were forced to set the absolute scale of metallicities to correspond to that derived from the m_1_index of the Stromgren uvby photometry for 24 binaries of the F-type sub-sample. The trend-adjusted metallicities [M/H]_1_ are distributed within -0.65<[M/H]_1_<+0.50, with the spread reflecting genuine metallicity differences between stars. One half of the F-sub-sample binaries have [M/H]_1_within -0.37<[M/H]_1_<+0.10, a median of -0.04 and a mean of -0.10, with a tail toward low metallicities, and a possible bias against very high metallicities. A parallel study of kinematic data, utilizing the most reliable and recently obtained proper motion and radial velocity data for 78 binaries of the full sample, shows that the F-type sub-sample binaries (44 stars with both velocities and metallicity determinations) have similar kinematic properties to solar-neighborhood, thin-disk dwarfs with space velocity component dispersions: {sigma}U=33km/s, {sigma}V=23km/s and {sigma}W=14km/s. FU Dra with a large spatial velocity, V_tot_=197km/s and [M/H]_1_=-0.6+/-0.2, appears to be the only thick-disk object in the F-type sub-sample. The kinematic data indicate that the F-type EW binaries are typical, thin-disk population stars with ages about 3-5.5Gyr. The F-type binaries that appear to be older than the rest tend to have systematically smaller mass ratios than most of the EW binaries of the same period.2013AJ....146...70Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/146/70CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)I/259 : The Tycho-2 Catalogue (Hog+ 2000)J/AJ/137/3655 : Radial velocities of 8 close binaries (Pribulla+, 2009)J/AJ/137/3646 : Radial velocities of 10 close binaries (Pribulla+, 2009)J/AJ/136/586 : Radial velocities of 10 close binaries (Rucinski+, 2008)J/AJ/133/1977 : Radial velocities of 10 close binaries (Pribulla+, 2007)J/AJ/132/769 : Radial velocities of 10 close binaries (Pribulla+, 2006)J/MNRAS/357/497 : Kinematics of W UMa-type binaries (Bilir+, 2005)J/AJ/130/767 : Radial velocities of close binary stars (Rucinski+, 2005)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/146/70https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/146/70http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/146/70https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/146/70https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/146/70http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/146/70GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/146/70/stars (Basic assumed parameters , line strengths and metallicities of the binary stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/146/70/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/146/70/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/146/70/stars?GETtext/xml+votable180.050000true33.059544.6610.0055555555555555566/147 263 400 454 1118 1933 2436 2499 2952 3201 3559 3707 4425 4698 5414 5427 5656 6312 6518 6844 7262 8040 8357 8579 8656 9514 9780 9922 9951 10002 10183 10601 10923 11337 11395 11576 11650 13159 13181 13618 13699 13859 14528 14576 14698 15329 15850 17310 18234 19075 19312 19448 19914 19998 20034 20270 21749 21969 22081 22929 23236 24391 24983 26097 26850 27017 27481 27603 27639 27852 28143 28296 28432 28582 30491 30565 31148 31604 31781 31812 31843 31886 32110 32307 32393 32713 36650 36805 44701 449813.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/146/70?format=asciiOpticaldefaultJ/AJ/146/70/starsBasic assumed parameters , line strengths and metallicities of the binary starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD1[1/18] Paper number in the DDO series (table1)meta.bibintD2[1/20] Successive star number within the papermeta.bibintNameStar namemeta.id;meta.maincharprimaryKSimbad column added by the CDSmeta.ref.urlcharPer[0.2207/1.0559] Perioddtime.periodfloatVmagV band magnitude at maximummagphot.mag;em.opt.VfloatB-VThe (B-V) color indexmagphot.color;em.opt.B;em.opt.Vfloate_B-VUncertainty in B-Vmagstat.error;phot.color;em.opt.Bfloatf_B-V[T] Color from the Tycho-2 Catalog (cat. I/259)meta.codecharE(B-V)Color excessmagphot.color.excessfloatDistDistancepcpos.distance;pos.heliocentricinte_DistUncertainty in Distpcstat.errorintGr[BFR] Group to which binary belongs (1)meta.idcharNp[4/131] Number of phase points (2)meta.numberintlogSLog of mean Broadening Function strength (see section 3)stat.correlationfloate_logSUncertainty in logS (evaluated from the phase scatter)stat.errorfloats_logSAssumed, combined error of logS (Appendix A3)stat.errorfloatdeltaMeasured shift in BF baseline ({delta}) (3)obs.param;arith.difffloate_deltaUncertainty in delta (3)stat.error;pos.eq.decfloat[M/H]rRaw determination of the metallicitylog(Sun)phys.abund.Zfloatf_[M/H]r[e] extrapolated metallicity (4)meta.codechar[M/H]m? Metallicity from Stromgren m_1_ indexlog(Sun)phys.abund.Zfloatnullable[M/H]? Trend-corrected metallicitylog(Sun)phys.abund.Zfloatnullablee_[M/H]Assumed final error in the metallicitylog(Sun)stat.error;phys.abundfloatf_[M/H][e] extrapolated metallicity (4)meta.codecharDDOSimbad column added by the CDSmeta.numberintnullableSimbadSimbad 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/AJ/146/70/table1The David Dunlap Observatory (DDO) spectroscopic surveyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintD1Paper number in the DDO seriesmeta.bibcharBibCodeBibliographic codemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharCatVizieR catalogmeta.id;meta.tablecharSystemBinary systemsmeta.idcharJ/AJ/146/70/velocKinematic data: proper motions (table7) and space velocities (table/)e_pmRAUncertainty in pmRAmas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDEProper motion along Declination (2)mas/yrpos.pm;pos.eq.decfloatnullablee_pmDEUncertainty in pmDEmas/yrstat.error;pos.pm;pos.eq.decfloatnullableD1[1/18] Paper number in the DDO series (table1)meta.bibintD2[1/10] Successive number within the DDO papermeta.bibintUvelNew U component space velocitykm/sphys.veloc;pos.cartesian.xfloate_UvelUncertainty in Uvelkm/sstat.errorfloatf_Uvel[B] Origin of Uvel (1)meta.codecharVvelNew V component space velocitykm/sphys.veloc;pos.cartesian.yfloate_VvelUncertainty in Vvelkm/sstat.errorfloatf_Vvel[B] Origin of Vvel (1)meta.codecharWvelNew W component space velocitykm/sphys.veloc;pos.cartesian.zfloate_WvelUncertainty in Wvelkm/sstat.errorfloatf_Wvel[B] Origin of Wvel (1)meta.codecharB+05Display the data from Bilir et al. 2005 (J/MNRAS/357/497meta.numberintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharHIPHipparcos mission numbermeta.idintnullableRVCenter-of-mass radial velocity (1)km/sphys.veloc;pos.heliocentricfloatnullablee_RVUncertainty in RVkm/sstat.errorfloatnullablepmRAProper motion along Right Ascension (2)mas/yrpos.pm;pos.eq.rafloatnullable