J/A+A/707/A142ivo://CDS.VizieR/J/A+A/707/A142CDSTrentin E.Catanzaro G.Ripepi V.Luongo E.Marconi M.Musella I.,Cusano F.Storm J.Bhardwaj A.De Somma G.Leccia S.Sicignano T.,Molinaro R.Testa V.2026-04-22T13:57:40Z2026-03-11T08:08:56ZCDS support team

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

cds-question@unistra.frvariable-starschemical-abundancesvisible-astronomyphotometryClassical Cepheids (DCEPs) are among the most important distance calibrators thanks to the correlation between their period and luminosity (PL relation), and play a crucial role in the calibration as the first rung of the extragalactic distance ladder. Given their typical age, they also constitute an optimal tracer of the young population in the Galactic disc. We aim to increase the number of available DCEPs with high-resolution spectroscopic metallicities, study the galactocentric radial gradients of several chemical elements, and analyse the spatial distribution of the Galactic young population of stars in the Milky Way disc. We performed a complete spectroscopical analysis of 136 spectra obtained from three different high- resolution spectrographs, for a total of 60 DCEPs. More than half have pulsational periods longer than 15 days, up to 70 days, doubling the number of stars in our sample with P>15d. We derived radial velocities, atmospheric parameters, and chemical abundances for up to 33 different species. We present an updated list of trusted spectroscopic lines for the detection and estimation of chemical abundances. We used this new set to revisit the abundances already published in the context of the C-MetaLL (Cepheids- Metallicity in the Leavitt Law) survey and increase the number of available chemical species. For the first time (to our knowledge), we present the estimation of abundances for Cepheids for dysprosium (Dy, Z=66), as well as a systematic estimation of erbium (Er, Z=68), lutetium (Lu, Z=71), and thorium (Th, Z=90) abundances. We calculated a galactic radial gradient for [Fe/H] with a slope of -0.064+/-0.002dex/kpc, in good agreement with recent literature estimation. The other elements also exhibit a clear negative radial trend, with this effect diminishing and eventually disappearing for heavier neutron-capture elements. Depending on the proposed spiral arms model present in several literature sources, our most external stars agree on tracing either the Perseus, the Norma-Outer, or both the Outer and the association Outer-Scutum-Centaurus (OSC) arms.2026A&A...707A.142Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/707/A142CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/707/A142https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/707/A142http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/707/A142https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/707/A142https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/707/A142http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/707/A142GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/707/A142/tablea1 (Main properties of the 60 programme DCEPs (corrected version, 22-Apr-2026))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/707/A142/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/707/A142/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/707/A142/tablea1?GETtext/xml+votable180.050000true294.026806912916621.83649467258330.005555555555555556Cone search capability for table J/A+A/707/A142/tablea4 (Estimated chemical abundances for the whole C-MetaLL dataset of 328 stars (corrected version, 22-Apr-2026))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/707/A142/tablea4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/707/A142/tablea4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/707/A142/tablea4?GETtext/xml+votable180.050000true81.54015511.85366110.0055555555555555565/9482 6/1383 1445 1467 1653 1752 1837 1858 1894 2684 3020 3045 3049 3059 3070 3182 3196 3310 3316 3329 3342 3361 3600 3616 3657 3663 3665 12968 12970-12971 13032 13288 13963 13990 14205 14262 14271 14303 14337 14340-14341 14352 14359 14388 14402 14406 14409 14414-14415 14424 14431 14600 14602 14607 14609 14618 14625 14647 14660 14678 14718 15360 15379 15424 15432 15618 15638 15959 20805 20818 20820 20822 20849 20854 20861-20863 20891 20945 20953 20958 20978 20980 20983 21509 21511 21514 21525 21546 21551 21600 21632 21634-21635 21638 21648 21664 21666 21672 21675 21677 21704 22024 22046-22047 22055 22073 22078 22090 22112 22120 22165 22167 22181 22203 22213 22218 22223 22432 23617 23620 23622-23623 23627 23630 23640 23643 23650 23659-23660 23727 23749 23755-23756 23764 23769 23797 23808 23852 23967 24088 24138 24145 24159 24327 24339 24347 24372 24380 24482 28717 28808 28893 28918 29081 29091 29095 29102 29106 29115 29126 29160 29166 29216 29249 29456 29510-29511 29521 29526 29542 29897 30210-30211 30222 30243-30245 30258 30260 30313 30315 30327 30401 30420 30452 30646 30659 30688 30692 30719 32067 32080 32957 33001 37245 37325 37331 37339-37340 37361 37367 37706 37716 37734-37736 37739 37783 37791 37821 37833 37866 37904-37906 37918 37924-37925 37936 38016-38017 38403 38408 39189 39191 39196 39199 39221 39225 39228-39230 39239 39314 39316-39317 39321 39326 39353 39364 39368 39390 39392 39406 39697 39708 39737 39743 39748-39749 39753-39755 39766 39771 39782 39784 39786 39790 39799 39824 39831 39837 39862 39871 39875 39880 39883-39885 39887 39889 39892 39894 39896 39898 39903 39905 39908 39919 39930 39933 40576 40634 41595 41626 41631 41651 41657 41667 41670 41674 41755 41765-41766 41769 41801 41877 42155 42171 42216 42224 42501 42820 43020 43022 43064 43722https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/707/A142?format=asciiOpticaldefaultJ/A+A/707/A142/tablea1Main properties of the 60 programme DCEPs (corrected version, 22-Apr-2026)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarLiterature name of the DCEPmeta.id;meta.maincharGaiaDR3Gaia DR3 identifiermeta.idRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainPeriodPeriod of pulsationdtime.perioddoubleModeMode of pulsationmeta.codecharGmagG magnitudemagphot.mag;em.optdoubleGBPmagGBP magnitudemagphot.mag;em.opt.BdoubleGRPmagGRP magnitudemagphot.mag;em.opt.RdoubleSimbadNameSimbad column added by the CDSmeta.idcharnullablergcGalactocentric distancekpcpos.distance;pos.galactocentricdoublee_rgcGalactocentric distance errorkpcstat.errordoublephiAzimutal angledegpos.posAngdoublehVertical distance from the disckpcpos.distancedoubleSourceInstrument used to observe the starmeta.id;instrcharNotesOrigin of the periods and modesmeta.notecharJ/A+A/707/A142/tablea2Observation information and atmospheric parameters for the 137 spectra analysed in this work (corrected version, 22-Apr-2026)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarName of the starmeta.id;meta.maincharNMultiplicity index when several spectra for the same starmeta.numbercharHJDHeliocentric Julian Day at mid exposuredtime.epoch;pos.heliocentricdoublePhasePhasetime.phasedoubleExpTimeExposure timestime.duration;obs.exposuredoubleSNRSignal-to-noise ratiostat.snrcharHRVHeliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricdoublee_HRVHeliocentric radial velocity errorkm/sstat.errorfloatTeffEffective temperatureKphys.temperature.effectiveinte_TeffEffective temperature errorKstat.error;phys.temperature.effectiveintvmicMicroturbulent velocitykm/sphys.velocfloate_vmicMicroturbulent velocity errorkm/sstat.errorfloatloggLogarithm of the gravitylog(cm.s**-2)phys.gravityfloate_logglogg errorlog(cm.s**-2)stat.errorfloatvbroadBroadening velocitykm/sphys.velocinte_vbroadvbroad errorkm/sstat.errorfloatSourceInstrument used to observe the starmeta.id;instrcharJ/A+A/707/A142/tablea3List of observed spectral lines in our spectraloggammarRadiative damping constant in logarithmic formphys.atmol.dampingfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintElElement and ionization statephys.atmol.element;phys.atmol.ionizationcharlambdaWavelength0.1nmem.wldoubleloggfOscillator strength, log(gf)phys.atmol.oscStrengthfloatEiLower level energy in eVeVphys.energy;phys.atmol.leveldoubleJiLower level total angular momentumeVphys.angMomentum;phys.atmol.levelfloatEfUpper level energy in eVphys.energy;phys.atmol.leveldoubleJfUpper level total angular momentumphys.mol.qnfloatloggammaSStark damping constant in logarithmic formphys.atmol.dampingfloatloggammaWVan der Waals damping constant in logarithmic formphys.atmol.dampingfloatCommentFurther info of the linemeta.notecharJ/A+A/707/A142/tablea4Estimated chemical abundances for the whole C-MetaLL dataset of 328 stars (corrected version, 22-Apr-2026)e_[Cr/H]? Chromium abundance errorstat.error;phys.abundfloatnullableSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarName of the starmeta.id;meta.mainchar[C/H]Carbon abundance in [X/H] formphys.abundfloate_[C/H]? Carbon abundance errorstat.error;phys.abundfloatnullable[O/H]? Oxygen abundance in [X/H] formphys.abundfloatnullablee_[O/H]? Oxygen abundance errorstat.error;phys.abundfloatnullable[Na/H]Sodium abundance in [X/H] formphys.abunddoublee_[Na/H]Sodium abundance errorstat.error;phys.abundfloat[Mg/H]? Magnesium abundance in [X/H] formphys.abunddoublenullablee_[Mg/H]? Magnesium abundance errorstat.error;phys.abundfloatnullable[Al/H]? Alluminium abundance in [X/H] formphys.abunddoublenullablee_[Al/H]? Alluminium abundance errorstat.error;phys.abundfloatnullable[Si/H]? Silicon abundance in [X/H] formphys.abunddoublenullablee_[Si/H]? Silicon abundance errorstat.error;phys.abundfloatnullable[S/H]? Solfur abundance in [X/H] formphys.abunddoublenullablee_[S/H]? Sulfur abundance errorstat.error;phys.abundfloatnullable[Ca/H]Calcium abundance in [X/H] formphys.abunddoublee_[Ca/H]Calcium abundance errorstat.error;phys.abundfloat[Sc/H]Scandium abundance in [X/H] formphys.abunddoublee_[Sc/H]Scandium abundance errorstat.error;phys.abundfloat[Ti/H]? Titanium abundance in [X/H] formphys.abunddoublenullablee_[Ti/H]? Titanium abundance errorstat.error;phys.abundfloatnullable[V/H]Vanadium abundance in [X/H] formphys.abunddoublee_[V/H]Vanadium abundance errorstat.error;phys.abundfloat[Cr/H]? Chromium abundance in [X/H] formphys.abunddoublenullable[Mn/H]? Manganese abundance in [X/H] formphys.abunddoublenullablee_[Mn/H]? Manganese abundance errorstat.error;phys.abundfloatnullable[Fe/H]Iron abundance in [X/H] formphys.abunddoublee_[Fe/H]Iron abundance errorstat.error;phys.abund.Fefloat[Co/H]Cobalt abundance in [X/H] formphys.abunddoublee_[Co/H]? Cobalt abundance errorstat.error;phys.abundfloatnullable[Ni/H]? Nickel abundance in [X/H] formphys.abunddoublenullablee_[Ni/H]? Nickel abundance errorstat.error;phys.abundfloatnullable[Cu/H]? Copper abundance in [X/H] formphys.abunddoublenullablee_[Cu/H]? Copper abundance errorstat.error;phys.abundfloatnullable[Zn/H]? Zinc abundance in [X/H] formphys.abunddoublenullablee_[Zn/H]? Zinc abundance errorstat.error;phys.abundfloatnullable[Sr/H]? Strontium abundance in [X/H] formphys.abundfloatnullablee_[Sr/H]? Strontium abundance errorstat.error;phys.abundfloatnullable[Y/H]? Yttrium abundance in [X/H] formphys.abunddoublenullablee_[Y/H]? Yttrium abundance errorstat.error;phys.abundfloatnullable[Zr/H]? Zirconium abundance in [X/H] formphys.abunddoublenullablee_[Zr/H]? Zirconium abundance errorstat.error;phys.abundfloatnullable[Ba/H]Barium abundance in [X/H] formphys.abundfloate_[Ba/H]Barium abundance errorstat.error;phys.abundfloat[La/H]? Lanthanum abundance in [X/H] formphys.abunddoublenullablee_[La/H]? Lanthanum abundance errorstat.error;phys.abundfloatnullable[Ce/H]? Cerium abundance in [X/H] formphys.abunddoublenullablee_[Ce/H]? Cerium abundance errorstat.error;phys.abundfloatnullable[Pr/H]? Praseodymium abundance in [X/H] formphys.abunddoublenullablee_[Pr/H]? Praseodymium abundance errorstat.error;phys.abundfloatnullable[Nd/H]? Neodymium abundance in [X/H] formphys.abunddoublenullablee_[Nd/H]? Neodymium abundance errorstat.error;phys.abundfloatnullable[Sm/H]? Samarium abundance in [X/H] formphys.abunddoublenullablee_[Sm/H]? Samarium abundance errorstat.error;phys.abundfloatnullable[Eu/H]? Europium abundance in [X/H] formphys.abunddoublenullablee_[Eu/H]? Europium abundance errorstat.error;phys.abundfloatnullable[Gd/H]? Gadolinium abundance in [X/H] formphys.abunddoublenullablee_[Gd/H]? Gadolinium abundance errorstat.error;phys.abundfloatnullable[Dy/H]? Dysprosium abundance in [X/H] formphys.abunddoublenullablee_[Dy/H]? Dysprosium abundance errorstat.error;phys.abunddoublenullable[Er/H]? Erbium abundance in [X/H] formphys.abunddoublenullablee_[Er/H]? Erbium abundance errorstat.error;phys.abunddoublenullable[Lu/H]? Lutetium abundance in [X/H] formphys.abunddoublenullablee_[Lu/H]? Lutetium abundance errorstat.error;phys.abunddoublenullable[Th/H]? Thorium abundance in [X/H] formphys.abundfloatnullablee_[Th/H]? Thorium abundance errorstat.error;phys.abundfloatnullableSourceInstrument used to observe the starmeta.id;instrchar_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.main