J/A+A/616/A82ivo://CDS.VizieR/J/A+A/616/A82doi:10.26093/cds/vizier.36160082CDSProxauf B.da Silva R.Kovtyukh V.V.Bono G.Inno L.Lemasle B.,Pritchard J.Przybilla N.Storm J.Urbaneja M.A.Valenti E.,Bergemann M.Buonanno R.D'Orazi V.Fabrizio M.Ferraro I.,Fiorentino G.Francois P.Iannicola G.Laney C.D.Kudritzki R.-P.,Matsunaga N.Nonino M.Primas F.Romaniello M.Thevenin F.2018-09-26T14:47:48Z2018-08-24T15:05:41ZCDS support team

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

cds-question@unistra.frvariable-starschemical-abundancesmilky-way-galaxyspectroscopyWe gathered more than 1130 high-resolution optical spectra for more than 250 Galactic classical Cepheids. The spectra were collected with different optical spectrographs: UVES at VLT, HARPS at 3.6m, FEROS at 2.2m MPG/ESO, and STELLA. To improve the effective temperature estimates, we present more than 150 new line depth ratio (LDR) calibrations that together with similar calibrations already available in the literature allowed us to cover a broad range in wavelength (between 5348 and 8427 angstrom) and in effective temperatures (between 3500 and 7700K). This means the unique opportunity to cover both the hottest and coolest phases along the Cepheid pulsation cycle and to limit the intrinsic error on individual measurements at the level of ~100K. Thanks to the high signal-to-noise ratio of individual spectra we identified and measured hundreds of neutral and ionized lines of heavy elements, and in turn, have the opportunity to trace the variation of both surface gravity and microturbulent velocity along the pulsation cycle. The accuracy of the physical parameters and the number of FeI (more than one hundred) and FeII (more than ten) lines measured allowed us to estimate mean iron abundances with a precision better than 0.1dex. Here we focus on 14 calibrating Cepheids for which the current spectra cover either the entire or a significant portion of the pulsation cycle. The current estimates of the variation of the physical parameters along the pulsation cycle and of the iron abundances agree quite well with similar estimates available in the literature. Independent homogeneous estimates of both physical parameters and metal abundances based on different approaches that can constrain possible systematics are highly encouraged.2018A&A...616A..82Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/616/A82CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/404/423 : BVI photometry of Galactic Cepheids (Tammann+, 2003)J/AcA/61/285 : Galactic Bulge Cepheids VI light curves (Soszynski+, 2011)J/ApJS/193/12 : JHK photometry of Northern Galactic Cepheids (Monson+, 2011)J/MNRAS/420/1590 : Abundances of classical Cepheids (Acharova+, 2012)J/PAZh/39/942 : Galactic classical Cepheids properties (Marsakov+, 2013)J/A+A/566/A37 : Iron abundances for 42 Galactic Cepheids (Genovali+, 2014)J/AN/336/70 : Galactic Cepheids velocities & proper motionshttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/616/A82https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/616/A82http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/616/A82https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/616/A82https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/616/A82http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/616/A82GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/616/A82/stars (List of studied stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/616/A82/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/616/A82/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/616/A82/stars?GETtext/xml+votable180.050000true271.20325-22.73238890.0055555555555555566/23922 28916 29089 29104 29110 29166 29665 30128 33804 39244 39410 41385 42185 43060https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/616/A82?format=asciidefaultJ/A+A/616/A82/starsList of studied starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCepheid namemeta.id;meta.maincharRAJ2000Simbad right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainPerPeriod from Genovali et al. (2014, Cat. J/A+A/566/A37)dtime.perioddoubleT4[T4] Indicates data in table4.datmeta.codecharT5[T5 ] Indicates data in table5.datmeta.codecharVCShow the Radial Velocity curvesmeta.ref.urlcharJ/A+A/616/A82/table3New and old Line Depth Ratio (LDR) calibrations adopted for effective temperature estimatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda1Wavelength of the first line of the pair0.1nmem.wl;spect.linefloatIon1Ion of the first line of the pairphys.atmol.ionStagecharlambda2Wavelength of the second line of the pair0.1nmem.wl;spect.linefloatIon2Ion of the second line of the pairphys.atmol.ionStagecharTeff1Lower value of LDR validity range in effective temperatureKinstr.bandwidth;stat.minintTeff2Upper value of LDR validity range in effective temperatureKinstr.bandwidth;stat.maxintaCoefficient of the analytical relationstat.fit.paramdoublebCoefficient of the analytical relationstat.fit.paramdoublec? Coefficient of the analytical relationstat.fit.paramdoublenullabled? Coefficient of the analytical relationstat.fit.paramdoublenullablee? Coefficient of the analytical relationstat.fit.paramdoublenullablef? Coefficient of the analytical relationstat.fit.paramdoublenullableFunctionAnalytical formulameta.noteRef[1/3] Reference for the LDR calibration (1)meta.bibintJ/A+A/616/A82/table4Atmospheric parameters, Fe abundances, and radial velocities for the calibrating CepheidsFeHWeighted mean of FeI and FeII abundancesphys.abund.Fefloate_FeHError in the weighted Fe abundancestat.errorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCepheid namemeta.id;meta.maincharDatasetSpectroscopic datasetpos.parallax.spectcharMJDModified Julian Datedtime.epochdoubleTeffEffective temperatureKphys.temperature.effectiveinte_TeffError in the effective temperatureKstat.error;phys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloatvtMicroturbulent velocitykm/sphys.velocfloatFeIIron abundance from FeI lines [FeI/H]phys.abund.Fefloate_FeIError in the FeI abundancestat.errorfloatNFeINumber of FeI lines adoptedmeta.numberintFeIIIron abundance from FeII lines [FeII/H]phys.abund.Fefloate_FeIIError in the FeII abundancestat.errorfloatNFeIINumber of FeII lines adoptedmeta.numberintRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVError in the radial velocitykm/sstat.errorfloatJ/A+A/616/A82/table5High-resolution spectra only adopted for radial-velocity measurementsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCepheid namemeta.id;meta.maincharDatasetSpectroscopic datasetpos.parallax.spectcharMJDModified Julian Datedtime.epochdoubleRVRadial velocitykm/sphys.veloc;pos.heliocentricfloate_RVError in the radial velocitykm/sstat.errorfloat