J/A+A/692/A115ivo://CDS.VizieR/J/A+A/692/A115doi:10.26093/cds/vizier.36920115CDSMartin N.F.Starkenburg E.Yuan Z.Fouesneau M.Ardern-Arentsen A.,De Angeli F.Gran F.Montelius M.Rusterucci S.Andrae R.,Bellazzini M.Montegriffo P.Esselink A.F.Zhang H.Venn K.A.,Viswanathan A.Aguado D.S.Battaglia G.Bayer M.Bonifacio P.,Caffau E.Cote P.Carlberg R.Fabbro S.Fernandez-Alvar E.,Gonzalez Hernandez J.I.Gonzalez Rivera de La Vernhe I.Hill V.,Ibata R.A.Jablonka P.Kordopatis G.Lardo C.McConnachie A.W.,Navarrete C.Navarro J.Recio-Blanco A.Sanchez Janssen R.Sestito F.,Thomas G.F.Vitali S.Youakim K.2025-11-11T20:01:03Z2024-12-06T12:08:48ZCDS support team

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

cds-question@unistra.frsurveysmilky-way-galaxychemical-abundancesvisible-astronomyWe used the spectro-photometric information of ~219 million stars from Gaia's Data Release 3 (DR3) to calculate synthetic, narrowband, metallicity-sensitive CaHK magnitudes that mimic the observations of the Pristine survey, a survey of photometric metallicities of Milky Way stars that has been mapping more than 6500 deg^2^of the northern sky with the Canada-France-Hawaii Telescope since 2015. These synthetic magnitudes were used for an absolute recalibration of the deeper Pristine photometry and, combined with broadband Gaia information, synthetic and Pristine CaHK magnitudes were used to estimate photometric metallicities over the whole sky. The resulting metallicity catalogue is accurate down to [Fe/H]~-3.5 and is particularly suited for the exploration of the metalpoor Milky Way ([Fe/H]<-1.0). We make available here the catalogue of synthetic CaHKsyn magnitudes for all stars with BP/RP information in Gaia DR3, as well as an associated catalogue of more than ~30 million photometric metallicities for high signal-to-noise FGK stars. This paper further provides the first public data release of the Pristine catalogue in the form of higher quality recalibrated Pristine CaHK magnitudes and photometric metallicities for all stars in common with the BP/RP spectro-photometric information in Gaia DR3. We demonstrate that, when available, the much deeper Pristine data greatly enhance the quality of the derived metallicities, in particular at the faint end of the catalogue (G_BP_~>16). Combined, both photometric metallicity catalogues include more than two million metal-poor star candidates ([Fe/H]_phot_<-1.0) as well as more than 200000 and ~8000 very and extremely metal-poor candidates ([Fe/H]_phot_<-2.0 and <-3.0, respectively). Finally, we show that these metallicity catalogues can be used efficiently, among other applications, for Galactic archaeology, to hunt for the most metal-poor stars, and to study how the structure of the Milky Way varies with metallicity, from the flat distribution of disk stars to the spheroid-shaped metal-poor halo.2024A&A...692A.115Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/692/A115CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/692/A115https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/692/A115http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/692/A115https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/692/A115https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/692/A115http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/692/A115GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/692/A115/pristine_ca (Photometry catalogue that includes both the synthetic CaHKsyn and the Pristine CaHK photometric information (table 1) (219194028 sources))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/692/A115/pristine_ca?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/692/A115/pristine_ca?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/692/A115/pristine_ca?GETtext/xml+votable180.050000true44.996155020.0056150.005555555555555556Cone search capability for table J/A+A/692/A115/pristine_gaia (Pristine-Gaia synthetic metallicity catalogue (table 2) (52297046 sources))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/692/A115/pristine_gaia?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/692/A115/pristine_gaia?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/692/A115/pristine_gaia?GETtext/xml+votable180.050000true45.004977940.019880060.005555555555555556Cone search capability for table J/A+A/692/A115/pristine_dr1 (Pristine DR1 metallicity catalogue (table 3) (6380652 sources))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/692/A115/pristine_dr1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/692/A115/pristine_dr1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/692/A115/pristine_dr1?GETtext/xml+votable180.050000true44.996155380.005615230.0055555555555555560/0-11 6/https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/692/A115?format=asciiOpticaldefaultJ/A+A/692/A115/pristine_caPhotometry catalogue that includes both the synthetic CaHKsyn and the Pristine CaHK photometric information (table 1) (219194028 sources)GaiaDR3Gaia DR3 source_id (source_id)meta.id;meta.mainindexedRAICRSGaia DR3 right ascension ICRS (J2016) (RA)degpos.eq.ra;meta.mainDEICRSGaia DR3 declination ICRS (J2016) float (DE)degpos.eq.dec;meta.mainFCaHKCaHK mean flux (CaHK_flux)W.m**-2.nm**-1phot.fluxdoublee_FCaHKUncertainty on the CaHK mean flux (d_CaHK_flux)W.m**-2.nm**-1stat.errordoubleCaHKsynmagCaHKsyn, synthetic Pristine-like CaHK magnitude (CaHK_syn)magphot.mag;em.optfloate_CaHKsynmag[] {delta} CaHKsyn, uncertainty on CaHKsyn (d_CaHK_syn)magstat.error;phot.magdoublePvarProbability for the source to be variable, as defined in section 5 (Pvar)stat.fit.goodnessfloatRAPdeg? Pristine right ascension ICRS (J2015.5) (RA_Pr)degpos.eq.ranullableDEPdeg? Pristine declination ICRS (J2015.5) (Dec_Pr)degpos.eq.decnullableCaHKPrmag? CaHK Pristine magnitude (CaHK_Pr)magphot.mag;em.optfloatnullablee_CaHKPrmag? Uncertainty on the CaHK Pristine magnitude (d_CaHK_Pr)magstat.error;phot.magfloatnullableFlagMorphology and quality flag (merged_CASU_flag) (G1)meta.code.errorintJ/A+A/692/A115/pristine_gaiaPristine-Gaia synthetic metallicity catalogue (table 2) (52297046 sources)PvarProbability for the source to be variable, as defined in Section 5 (Pvar)stat.fit.goodnessdoubleGaiaDR3Gaia DR3 source_id (source_id)meta.id;meta.mainindexedRAICRSGaia DR3 right ascension ICRS (J2016) (RA)degpos.eq.ra;meta.mainDEICRSGaia DR3 declination ICRS (J2016) (Dec)degpos.eq.dec;meta.mainE(B-V)Schlegel et al. (1998ApJ...500..525S) extinction value (E(B-V))magphot.color.excessfloatGmag0? De-reddened Gaia G magnitude (G_0)magphot.mag;em.optfloatnullablee_Gmag0{delta}G, uncertainty on the Gaia G magnitude (d_G)magstat.error;phot.magfloatBpmag0? De-reddened Gaia GBP magnitude (BP_0)magphot.mag;em.opt.Bfloatnullablee_Bpmag0{delta}GBP, uncertainty on the Gaia GBP magnitude (d_BP)magstat.error;phot.magfloatRpmag0? De-reddened Gaia GRP magnitude (RP_0)magphot.mag;em.opt.Rfloatnullablee_Rpmag0{delta}GRP, uncertainty on the Gaia GRP magnitude (d_RP)magstat.error;phot.magfloatCaHKmag0? De-reddened Pristine-like CaHKsyn magnitude (CaHK_0)magphot.mag;em.optfloatnullablee_CaHKmag0{delta}CaHKsyn, uncertainty on the Pristine-like CaHKsyn magnitude (d_CaHK_syn)magstat.error;phot.magfloat[Fe/H]phsyn? Photometric metallicity [Fe/H]phot based on the CaHKsyn magnitude and using the (favored) giant model (FeH_CaHKsyn)phys.abund.Fefloatnullableb_[Fe/H]ph? Lower bound of the 68% confidence interval on FeH_CaHKsyn based on the Monte Carlo sampling of the magnitude uncertainties (FeH_CaHKsyn_16th)stat.fit.paramfloatnullable[Fe/H]ph? Median value of FeH_CaHKsyn based on the Monte Carlo sampling of the magnitude uncertainties (FeH_CaHKsyn_50th)phys.abund.FefloatnullableB_[Fe/H]ph? Upper bound of the 68% confidence interval on FeH_CaHKsyn based on the Monte Carlo sampling of the magnitude uncertainties (FeH_CaHKsyn_84th)stat.fit.paramfloatnullableMCfCaHKsynFraction of the Monte Carlo samples of the magnitude uncertainties that fall outside the model color-color space (mcfrac_CaHKsyn)meta.notefloatGmag0dw? De-reddened Gaia G magnitude for the dwarf model (G_0_dw)magphot.mag;em.optfloatnullableBpmag0dw? De-reddened Gaia GBP magnitude for the dwarf model (BP_0_dw)magphot.mag;em.opt.BfloatnullableRpmag0dw? De-reddened Gaia GRP magnitude for the dwarf model (RP_0_dw)magphot.mag;em.opt.RfloatnullableCaHKmag0dw? De-reddened Pristine-like CaHKsyn magnitude (CaHK_0_dw)magphot.mag;em.optfloatnullable[Fe/H]phsyndw? Photometric metallicity [Fe/H]phot based on the CaHKsyn magnitude and using the (favored) giant model for the dwarf model (FeH_CaHKsyn_dw)phys.abund.Fefloatnullableb_[Fe/H]phdw? Lower bound of the 68% confidence interval on FeH_CaHKsyn based on the Monte Carlo sampling of the magnitude uncertainties for the dwarf model (FeH_CaHKsyn_dw_16th)stat.fit.paramfloatnullable[Fe/H]phdw? Median value of FeH_CaHKsyn based on the Monte Carlo sampling of the magnitude uncertainties for the dwarf model (FeH_CaHKsyn_dw_50th)phys.abund.FefloatnullableB_[Fe/H]phdw? Upper bound of the 68% confidence interval on FeH_CaHKsyn based on the Monte Carlo sampling of the magnitude uncertainties for the dwarf model (FeH_CaHKsyn_dw_84th)stat.fit.paramfloatnullableMCfCaHKsyndwFraction of the Monte Carlo samples of the magnitude uncertainties that fall outside the model color-color space for the dwarf model (mcfrac_CaHKsyn_dw)meta.notefloatRUWE? Gaia DR3 Renormalised Unit Weight Error (RUWE)stat.errorfloatnullableCstarGaia DR3 corrected flux excess, C*, as defined in equation 6 of Riello et al. (2021A&A...649A...3R) (Cstar)magphot.flux;arith.ratiodoubles_CstarNormalized standard deviation of C* for the G magnitude of this source, as defined in equation 18 of Riello et al. (2021A&A...649A...3R) (Cstar_1sigma)magstat.stdev;phot.magdoubleJ/A+A/692/A115/pristine_dr1Pristine DR1 metallicity catalogue (table 3) (6380652 sources)RUWE? Gaia DR3 Renormalised Unit Weight Error (RUWE)stat.errorfloatnullableGaiaDR3Gaia DR3 source_id (source_id)meta.id;meta.mainindexedRAICRSGaia DR3 right ascension ICRS (J2016) (RA)degpos.eq.ra;meta.mainDEICRSGaia DR3 declination ICRS (J2016) (Dec)degpos.eq.dec;meta.mainE(B-V)Schlegel et al. (1998ApJ...500..525S) extinction value (E(B-V))magphot.color.excessfloatFlagMorphology and quality flag10 (merged_CASU_flag) (G1)meta.code.errorintGmag0De-reddened Gaia G magnitude (G_0)magphot.mag;em.optfloate_Gmag0{delta}G, uncertainty on the Gaia G magnitude (d_G)magstat.error;phot.magfloatBpmag0De-reddened Gaia GBP magnitude (BP_0)magphot.mag;em.opt.Bfloate_Bpmag0{delta}GBP, uncertainty on the Gaia GBP magnitude (d_BP)magstat.error;phot.magfloatRpmag0De-reddened Gaia GRP magnitude (RP_0)magphot.mag;em.opt.Rfloate_Rpmag0{delta}GRP, uncertainty on the Gaia GRP magnitude (d_RP)magstat.error;phot.magfloatCaHKmag0De-reddened Pristine CaHK magnitude (CaHK_0)magphot.mag;em.optfloate_CaHKmag0{delta}CaHK, uncertainty on the Pristine CaHK magnitude (d_CaHK)magstat.error;phot.magfloat[Fe/H]phPgm? Photometric metallicity [Fe/H]phot based on the Pristine CaHK magnitudes and using the (favored) giant model (FeH_Pristine)phys.abund.Fefloatnullableb_[Fe/H]phP? Lower bound of the 68% confidence interval on FeH_Pristine based on the Monte Carlo sampling of the magnitude uncertainties (FeH_Pristine_16th)stat.fit.paramfloatnullable[Fe/H]phP? Median value of FeH_Pristine based on the Monte Carlo sampling of the magnitude uncertainties (FeH_Pristine_50th)phys.abund.FefloatnullableB_[Fe/H]phP? Upper bound of the 68% confidence interval on FeH_Pristine based on the Monte Carlo sampling of the magnitude uncertainties (FeH_Pristine_84th)stat.fit.paramfloatnullableMCfCaHKPFraction of the Monte Carlo samples of the magnitude uncertainties that fall outside the model color-color space (mcfrac_Pristine)meta.notefloatGmag0dwDe-reddened Gaia G magnitude for the dwarf model (G_0_dw)magphot.mag;em.optfloatBpmag0dwDe-reddened Gaia GBP magnitude for the dwarf model (BP_0_dw)magphot.mag;em.opt.BfloatRpmag0dwDe-reddened Gaia GRP magnitude for the dwarf model (RP_0_dw)magphot.mag;em.opt.RfloatCaHKmag0dwDe-reddened Pristine-like CaHKsyn magnitude (CaHK_0_dw)magphot.mag;em.optfloat[Fe/H]phPgmdw? Photometric metallicity [Fe/H]phot based on the Pristine CaHK magnitudes and using the (favored) giant model for the dwarf model (FeH_Pristine_dw)phys.abund.Fefloatnullableb_[Fe/H]phPdw? Lower bound of the 68% confidence interval on FeH_Pristine based on the Monte Carlo sampling of the magnitude uncertainties for the dwarf model (FeH_Pristine_dw_16th)stat.fit.paramfloatnullable[Fe/H]phPdw? Median value of FeH_Pristine based on the Monte Carlo sampling of the magnitude uncertainties for the dwarf model (FeH_Pristine_dw_50th)phys.abund.FefloatnullableB_[Fe/H]phPdw? Upper bound of the 68% confidence interval on FeH_Pristine based on the Monte Carlo sampling of the magnitude uncertainties for the dwarf model (FeH_Pristine_dw_84th)stat.fit.paramfloatnullableMCfCaHKPdwFraction of the Monte Carlo samples of the magnitude uncertainties that fall outside the model color-color space for the dwarf model (mcfrac_Pristine_dw)meta.notefloatPvarProbability for the source to be variable, as defined in Section 5 (Pvar)stat.fit.goodnessfloatCstarGaia DR3 corrected flux excess, C*, as defined in equation 6 of Riello et al. (2021A&A...649A...3R) (Cstar)magphot.flux;arith.ratiodoubles_CstarNormalized standard deviation of C* for the G magnitude of this source, as defined in equation 18 of Riello et al. (2021A&A...649A...3R) (Cstar_1sigma)magstat.stdev;phot.magdouble