J/A+A/678/A138ivo://CDS.VizieR/J/A+A/678/A138doi:10.26093/cds/vizier/bc-n6/lbdiCDSKovacs G.Jurcsik J.2026-07-01T14:00:52Z2023-10-17T15:40:45ZCDS support team

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

cds-question@unistra.frvariable-starshorizontal-branch-starsmetallicityBy using a large sample of fundamental mode RR Lyrae stars with published spectroscopic iron abundances and gravities, we point out the importance of correcting these abundances by using more accurate temporal gravities. For the 197 stars with multiple spectra we find overall [Fe/H] standard deviations of 0.167 (as published), 0.145 (shifted by data source zero points) and 0.121 (both zero point shifted and corrected to the static gravity). These improvements are significant at the ~2 sigma level at each correction step, leading to a clearly significant improvement after both corrections applied. The higher quality of the gravity-corrected metallicities is strongly supported also by the tighter correlation with the metallicities predicted from the period and Fourier phase phi_31_. This work underlines the need for using some external estimates of the temporal gravity in the chemical abundance analysis rather than relying on a full-fetched spectrum fit that leads to large correlated errors in the estimated parameters.2023A&A...678A.138Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/678/A138CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/678/A138https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/678/A138http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/678/A138https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/678/A138https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/678/A138http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/678/A138GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/678/A138/tablea3 (*LDS, HDS and combined metallicities)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/678/A138/tablea3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/678/A138/tablea3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/678/A138/tablea3?GETtext/xml+votable180.050000true280.907854432.79831970.0055555555555555566/110 553 1294 1663 2173 2238 2254 2404 2484 2629 3176 4037 4152 4165 4219 4286 4338 4479 4762 4828 4833 4942 5182 5543 5708 6301 6530 6537 6560 6567 6744 7174 7518 7847 8466 8512 8612 8614 8896 9027 9095 9138 9172 9429 9438 9509 9635 9769 9938 10169 10334 10362 10382 10415 10524 10541 10569 10584 10638 10661 10792 10797 10802 10862 10898 10985 11098 11492 11961 12463 12512 12536 12576 12632 12696 12743 12773 12918 13066 13171 13205 13588 13647 13680 13905 14217 14373 14504 14735 14782 14857 14874 14918 14935 14939 14952 14956 14960 14994 14996 15043 15106 15119-15120 15141 15148-15149 15156 15220 15281 16018 16022 16126-16127 16308 16342 16553 16602 16849 16867 16923 17065 17070 17158 17328 17745 18080 18177 18303 18502 18536 18578 18633 18964 19104 19110 19169 19449 19956 20020 20097 20275 20303 20497 20541 20998 21127 21146 21182 21533 21878 21961 22111 22338 22537 22569 22571 22842 23271 23613 24590 24602 24614 24623 24724 24772 24866 25199 25491 25611 25768 25799 25807 25866 25953 26065 26079 26131 26170 26281 26288 26413 26435 26487 26515 26733 26756 26894 26981 27012 27125 27361 27474 27543 27554 27583 27824 27833 27915 27983 27998 28030 28143 28156 28222 28256 28383 28469 28519 28524-28525 28538 28582 28611 28701 28813 29009 30019 30055 30868 30923 30957 31054 31335 31390 31415 31456 31648 31743 31787 31866 31884 32052 32239 32254 32257 32282 32354 32436 32636 32663 32822 32833 32856 32994 33051 33117 33121 33127 33197 33432 33465 33467 33553 33745 33996 34229 34236 34240 34285 34537 34558 35418 35423 35611 35678 35724 35768 35852 35921 35944 36048 36363 36435 36605 36704 36781 36939 37095 37544 37911 38087 38233 38259 38304 38360 38456 38809 38942 39152 40553 40651 40722 40767-40768 40806 40882 40911 40962 40988 40998 41022 41064 41081 41174 41191 41200 41217 41219 41227 41231 41248 41260 41283 41285 41318 41510 41991 42007 42053 42138 42260 42672 43387 43405 43491 43558 43764 43794 43888 43977 44242 44498 44559 44640 44914 44924 44991 45062 45086 45152 45164 45241 45324 45337 45676 45741 45765 45796 45963 45992 46069 46130 46204 46246 46327 46373 46520 46641 46650 46686 46705 46755 47074 47273 47327 47467-47468 47527 47618 47674 47776 47821 47856 47959 48113 48137 48228 48290 48576 48911 48935 48944 48995 49011 49086 49102https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/678/A138?format=asciidefaultJ/A+A/678/A138/tablea1*Star-by-star and source-by-source HDS parameters for 269 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarName of the variablemeta.id;meta.maincharlogTefflog effective temperature, as given by the sourcelog(K)phys.temperature.effectivefloatloggSSurface gravity, as given by the sourcelog(cm.s**-2)phys.gravityfloatloggPAn approximation of the static surface gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]SMetallicity, [Fe/H], as given by the sourcephys.abund.Zfloat[Fe/H]Plogg and zero point (ZP) corrected [Fe/H]phys.abund.FefloatDZPSource-dependent differential ZP correctionarith.factorfloatr_[Fe/H]Acronym for the [Fe/H] source (G1)meta.refcharJ/A+A/678/A138/tablea2*Average HDS metallicitiese_[Fe/H]SStandard error of the meanstat.error;phys.abund.Fefloat[Fe/H]PMean of the corrected [Fe/H] (1)phys.abund.Fe;stat.meanfloate_[Fe/H]PStandard error of the meanstat.error;phys.abund.FefloatNspNumber of spectrameta.numberintRef1List of data sources (G1)meta.bibcharRef2List of data sources (G1)meta.bibcharRef3List of data sources (G1)meta.bibcharRef4List of data sources (G1)meta.bibcharRef5List of data sources (G1)meta.bibcharRef6List of data sources (G1)meta.bibcharRef7List of data sources (G1)meta.bibcharRef8List of data sources (G1)meta.bibcharRef9List of data sources (G1)meta.bibcharRef10List of data sources (G1)meta.bibcharRef11List of data sources (G1)meta.bibcharRef12List of data sources (G1)meta.bibcharRef13List of data sources (G1)meta.bibcharRef14List of data sources (G1)meta.bibcharRef15List of data sources (G1)meta.bibcharRef16List of data sources (G1)meta.bibcharRef17List of data sources (G1)meta.bibcharRef18List of data sources (G1)meta.bibcharRef19List of data sources (G1)meta.bibcharRef20List of data sources (G1)meta.bibcharRef21List of data sources (G1)meta.bibcharRef22List of data sources (G1)meta.bibcharRef23List of data sources (G1)meta.bibcharRef24List of data sources (G1)meta.bibcharRef25List of data sources (G1)meta.bibcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarName of the variablemeta.id;meta.mainchar[Fe/H]SMean of the original (source given) [Fe/H]phys.abund.Fe;stat.meanfloatJ/A+A/678/A138/tablea3*LDS, HDS and combined metallicitiesNHDNumber of HDS spectra (3)meta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarName of the variablemeta.id;meta.maincharLA94aPublished [Fe/H] by Layden (1994AJ....108.1016L, Cat. J/AJ/108/1016)meta.ref;phys.abund.FefloatLA94bTransformed [Fe/H], as given in the paper (1)meta.bibfloatNLANumber of spectra in Layden (1994AJ....108.1016L, Cat. J/AJ/108/1016)meta.numberintSU94aPublished [Fe/H] by Suntzeff (1994AJ....108.1016L, Cat. J/AJ/108/1016)meta.ref;phys.abund.FefloatSU94bTransformed [Fe/H], as given in the paper (2)meta.bibfloatNSUNumber of spectra in Suntzeff (1994AJ....108.1016L, Cat. J/AJ/108/1016)meta.numberintSimbadNameSimbad column added by the CDSmeta.idcharnullableHDSAverage HDS [Fe/H], as given in the papermeta.bibfloat[Fe/H]avgAverage [Fe/H] from the LDS and HDS sources, weighted by the number of spectra in each sourcephys.abund.Fe;stat.meanfloate_[Fe/H]avgError assigned to [Fe/H]avgstat.error;phys.abund.FefloatNLDLDS exclusivity flag (4)meta.codeint_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/A+A/678/A138/tablea4*Fourier parameters for 394 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarName of the variablemeta.id;meta.maincharPerFundamental pulsation perioddtime.perioddoubleAmptotTotal (peak-to-peak) amplitudemagsrc.var.amplitudefloatphi31Epoch-independent 3rd-harmonics Fourier phaseradstat.fit.paramfloatphi41Epoch-independent 4th-harmonics Fourier phaseradstat.fit.paramfloatNNumber of data pointsmeta.numberintRMSRoot mean square of the residualsmagstat.stdevfloatNFNumber of Fourier componentsmeta.numberintTimeTotTotal time span of the data analyzeddtime.intervalintQual[0/3] Quality of the fitmeta.code.qual;stat.fit.param;meta.modelledintTelTelescope (system) used in the observationsinstr.setup;obschar