J/AJ/168/139ivo://CDS.VizieR/J/AJ/168/139doi:10.26093/cds/vizier.51680139CDSKunder A.Prudil Z.Skaggs C.Reggiani H.Nataf D.M.Hughes J.,Covey K.R.Devine K.2025-05-21T20:12:45Z2025-03-05T09:19:54ZCDS support team

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

cds-question@unistra.frvariable-starsvisible-astronomyspectroscopyinfrared-astronomychemical-abundancesmilky-way-galaxyline-intensitiesRR Lyrae stars (RRLs) are excellent tracers of stellar populations for old, metal-poor components in the the Milky Way and the Local Group. Their luminosities have a metallicity dependence, but determining spectroscopic [Fe/H] metallicities for RRLs, especially at distances outside the solar neighborhood, is challenging. Using 40 RRLs with metallicities derived from both Fe(II) and Fe(I) abundances, we verify the calibration between the [Fe/H] of RRLs from the calcium triplet. Our calibration is applied to all RRLs with Gaia Radial Velocity Spectrometer (RVS) spectra in Gaia DR3 and to 80 stars in the inner Galaxy from the BRAVA-RR survey. The coadded Gaia RVS RRL spectra provide RRL metallicities with an uncertainty of 0.25 dex, which is a factor of two improvement over the Gaia photometric RRL metallicities. Within our Galactic bulge RRL sample, we find a dominant fraction with low energies without a prominent rotating component. Due to the large fraction of such stars, we interpret these stars as belonging to the in situ metal-poor Galactic bulge component, although we cannot rule out that a fraction of these belong to an ancient accretion event such as Kraken/Heracles.2024AJ....168..139Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/168/139CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIII/283 : RAVE 6th data release (Steinmetz+, 2020)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)I/358 : Gaia DR3 Part 4. Variability (Gaia Collaboration, 2022)J/AJ/108/1016 : Kinematics of local RR lyrae stars. I. (Layden, 1994)J/A+A/312/111 : [Fe/H] from RR Lyrae light curves (Jurcsik+, 1996)J/A+A/330/515 : RR Lyrae parallaxes & proper motions (Fernley+ 1998)J/ApJS/197/29 : Chemical compositions of 11 RR Lyrae (For+, 2011)J/MNRAS/434/1681 : Extremely metal-poor stars CaII triplet (Carrera+, 2013)J/MNRAS/435/3206 : Properties of field RR Lyrae variables (Dambis+, 2013)J/MNRAS/447/2404 : Equivalent width of 21 RR Lyrae stars (Pancino+, 2015)J/ApJ/821/L25 : Bulge RR Lyrae RV Assay (BRAVA-RR) (Kunder+, 2016)J/ApJ/844/L4 : PS1 RRab for tracing outer Virgo overdensity (Sesar+, 2017)J/ApJ/848/68 : Abund. & RVs of stable and Blazhko RRc stars (Sneden+, 2017)J/AJ/154/85 : CTIO/DECam photometry of RR Lyrae stars in M5 (Vivas+, 2017)J/MNRAS/481/1195 : GaiaDR2 RR Lyrae stars as standard candles (Muraveva+, 2018)J/MNRAS/484/4833 : Oosterhoff dichotomy in Galactic bulge (Prudil+, 2019)J/MNRAS/493/5195 : Milky Way halo stars ages and kinematics (Das+, 2020)J/ApJS/247/68 : Probing the Gal. halo with RR Lyrae stars. I. (Liu+, 2020)J/MNRAS/492/3408 : Galactic disc RR Lyrae stars (Prudil+, 2020)J/ApJ/914/10 : Field RR Lyrae as Gal. probes. III. Abund. (Crestani+, 2021)J/ApJ/908/20 : Field RR Lyrae as galactic probes. II. (Crestani+, 2021)J/ApJ/920/33 : Fe/H estimation of RR Lyrae from I- LC (Dekany+, 2021)J/MNRAS/502/4074 : Period-luminosity-metallicities of RRLs (Muhie+, 2021)J/ApJ/912/144 : Metallicity of Gal. RR Lyrae from LCs (Mullen+, 2021)J/A+A/648/A78 : Orphan stream RR Lyrae and non-variables (Prudil+, 2021)J/ApJS/261/33 : Phot. metallicity prediction of RR Lyrae (Dekany+, 2022)J/A+A/674/A18 : Gaia DR3. The RR Lyrae sample (Clementini+, 2023)J/MNRAS/530/3391 : Pristine Inner Gal. Survey VIII (Ardern-Arentsen+, 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/168/139https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/168/139http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/168/139https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/168/139https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/168/139http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/168/139GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/168/139/table1 (RR Lyrae star spectra used to calibrate the EW for CaII at 8498{AA} to [Fe/H] metallicity)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/139/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/139/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/139/table1?GETtext/xml+votable180.050000true321.764502518.59934940.005555555555555556Cone search capability for table J/AJ/168/139/table3 (The [Fe/H] metallicities of local RRLs from Gaia RVS spectra using the equivalent width of the 8498{AA} CaII line)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/168/139/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/168/139/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/168/139/table3?GETtext/xml+votable180.050000true32.55155-28.945150.0055555555555555566/531 1028 1541 2459 2579 2703 2779 2904 3176 4733 4924 4998 5543 6138 6430 7031 7297 7336 7368 7462 7558 7768 7774 7847 8178 8896 9363 9509 9539 10150 10661 11982 12354 12686 12696 12823 12854 13154 13171 13813 13889 13905 14373 14581 14595 15281 15801 16022 16331 16849 16867 16934 17328 18177 18536 18578 18633 18964 19104 20020 20267 20497 20681 20732 20762 20998 21127 21131 21146 21182 21270 21473 21733 22745 22952 23407 24205 24660 24724 24772 24866 24966 25081 25120 25485 25491 25698 25803 25806 25879 26413 26435 27047 27148 27660 28813 30019 30725 30819 30868 30881 30957 31054 31093 31173 31335 31495 31498 31544 31787 32180 32257 32734 33104 33177 33197 33342 33411 33465 33467 33525 33665 33808 33825 33996 34236 34423 34491 34537 34596 34606 34613 34944 35151 35629 35652 35671 35714 35758 35869 35942 36781 37599 37911 38087 38350 38762 38984 39403 39547 39655 39762 39985 40475 40651 40767 40806 40942 41081 41153 41345 41456 41492 41505 41991 42260 42942 42965 43317 43671 43764 43801 44108 44242 44498 44914 45086 45164 45202 45324 45539 45765 45767 45892 46069 46075 46130 46336 46373 46396 46464 46632 46650 47395 47417 47446 47527 47550 47821 47856 48113 48228 48916 49049 491021.9867573869263685e-19 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/168/139?format=asciiOpticalInfrareddefaultJ/AJ/168/139/table1RR Lyrae star spectra used to calibrate the EW for CaII at 8498{AA} to [Fe/H] metallicitySimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia DR3 identifiermeta.id;meta.mainm_GaiaNumber of spectra for this starmeta.numberintnullable[Fe/H][-2.5/-0.16] Metallicity from Crestani+ 2021, J/ApJ/914/10phys.abund.Zfloate_[Fe/H][0/0.2] Uncertainty in [Fe/H]stat.error;phys.abund.FefloatPer[0.26/0.71] Pulsation perioddtime.perioddoubleM0Time of maximum brightness, M0dtime.epochdoubleHJDTime spectra was takendtime.epochdoubleTypeType of single-mode RRL ("RRab" or "RRc")src.classcharFileSpectra name from archivemeta.id;meta.filecharSN[28/221] Signal-to-noise ratiostat.snrintRes[1512/56990] Resolutionpos.angResolutionintInstInstrument used ("XSHOOTER", "UVES" or "rave")meta.id;instrcharEW[391/863] Measured equivalent width; Angstroms0.1nmspect.line.eqWidthfloate_EW[1/33] Uncertainty in EW0.1nmstat.error;spect.line.eqWidthfloatRVSDisplay the Gaia data for this star (link to Table 3)meta.ref.urlintnullableC21Display data from Crestani+ 2021, J/ApJ/914/10meta.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/168/139/table3The [Fe/H] metallicities of local RRLs from Gaia RVS spectra using the equivalent width of the 8498{AA} CaII lineSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaGaia DR3 identifiermeta.id;meta.mainRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainEW[265/991] CaT equivalent width1e-13mspect.line.eqWidthinte_EW[3/57] Uncertainty in EW1e-13mstat.error;spect.line.eqWidthint[Fe/H][-2.8/-0.01] Metallicityphys.abund.Zfloate_[Fe/H][0.14/0.3] Uncertainty in [Fe/H]stat.error;phys.abund.FefloatSN[18/179] Signal-to-noise ratiostat.snrintNep[5/54] Number of clean Gaia epochsmeta.numberintGmag[9.56/13.14] Apparent Gaia DR3 G magnitudemagphot.mag;em.optfloatESODisplay the ESO data for this star (link to Table 1)meta.ref.urlintnullable