J/A+A/683/L11ivo://CDS.VizieR/J/A+A/683/L11doi:10.26093/cds/vizier.36839011CDSViswanathan A.Starkenburg E.Matsuno T.Venn K.A.Martin N.F.,Longeard N.Ardern-Arentsen A.Carlberg R.G.Fabbro S.Kordopatis G.,Montelius M.Sestito F.Yuan Z.2025-07-04T20:02:05Z2024-03-15T08:33:15ZCDS support team

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

cds-question@unistra.frmilky-way-galaxychemically-peculiar-starsmetallicityline-intensitiesGaia DR3 has offered the scientific community a remarkable dataset of approximately one million spectra acquired with the Radial Velocity Spectrometer (RVS) in the Calcium II triplet region, that is well-suited to identify very metal-poor (VMP) stars. However, over 40% of these spectra have no released parameters by Gaia's GSP-Spec pipeline in the domain of VMP stars, whereas VMP stars are key tracers of early Galactic evolution. We aim to provide spectroscopic metallicities for VMP stars using Gaia RVS spectra, thereby producing a catalogue of bright VMP stars distributed over the full sky that can serve as the basis to study early chemical evolution throughout the Galaxy. We select VMP stars using photometric metallicities from the literature and analyse the Gaia RVS spectra to infer spectroscopic metallicities for these stars. The inferred metallicities agree very well with literature high-resolution metallicities with a median systematic offset of 0.1dex and standard deviation of ~0.15dex. The purity of this sample in the VMP regime is ~80% with outliers representing a mere ~3%. We make available an all-sky catalogue of ~1500 stars with reliable spectroscopic metallicities down to [Fe/H]~-4.0, of which ~1000 are VMP stars. More than 75% of these stars have either no spectroscopic metallicity value in the literature to date or are flagged to be unreliable in their literature spectroscopic metallicity estimates. This catalogue of bright (G<13) VMP stars is three times larger than the current sample of well-studied VMP stars in the literature in this magnitude range, making it ideal for high-resolution spectroscopic follow-up and to study the properties of VMP stars in different parts of our Galaxy.2024A&A...683L..11Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/683/L11CatalogResearchIsServedByTAP 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/683/L11https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/683/L11http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/683/L11https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/683/L11https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/683/L11http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/683/L11GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/683/L11/catalog (Gaia RVS VMP catalogue (table 1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/683/L11/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/683/L11/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/683/L11/catalog?GETtext/xml+votable180.050000true39.5752381163714.098039865150.0055555555555555565/6402 6/191 408 553 614 1368 1532 2576 2600 2615 2620 2734 2787 2854 3833 3938 4137 4139 4312 4440 4512 4520 4612 4729 4846 4875 4881 4884 4901 4917 5015 5017 5023 5275 5365 5560 5567 5579 5581 5585 5636 5811 5959 5961 5976 6115 6212 6395 6414 6452 6457 6460 6511 6516 6539 6589 6594 6606 6642 6648 6948 7140 7210 7234 7274 7338 7368 7551 7747 7839 7939 8228 8260 8418-8419 8446 8587 8635 8690-8691 8796 8810 9043 9051 9063 9072 9116 9131 9154 9236 9244 9259 9261 9264 9335 9343 9348 9354 9360 9364 9369 9389 9438 9463 9478 9507 9581 9601-9602 9609 9666 9833 9859 9871-9872 9908 9912 9922 9931 9944-9946 9948 9958 9973 9979 9984 10063 10086 10090 10139 10179 10181 10190 10211 10252 10258 10270 10279 10289 10437 10448 10459 10465 10483 10542 10582 10587 10632-10633 10683 10710 10714 10721 10726 10811 10822 10928 10961 10976 10997 11003 11017 11047 11079 11110 11120 11159 11270 11302-11306 11320 11395-11396 11438 11464 11574 11590-11591 11596 11619 11628 11703 11719 11725 11756 11773 11778 11986 12122 12156 12305 12310 12316 12323 12342 12392 12405 12409 12411 12467 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24779 24843 24955 24961 25019 25027 25036 25051 25103 25115 25127 25141 25154 25158 25180 25196-25197 25449 25466 25539-25540 25548 25579 25603 25614 25630 25636 25639 25658 25683 25698 25710 25719 25722 25733 25749 25759 25772 25812 25836 25847-25848 25853-25854 25893 25944 26019 26109 26164 26167 26170 26282 26362 26391 26605 26722 26795 26817 27049 27052 27057 27062 27106 27127 27147 27170 27177 27228 27314 27317 27348 27363 27409 27543 27668 27682 27900 27911 28347 28369 28420 28541 28595 28630 28672 28689 28693 28733 28739 28752 28765 28783 28787 28943 28966-28967 28972-28973 29195 29216 29219 29240 29242 29257 29260 29278 29309 29332-29333 29341 29343 29368 29424 29428 29430 29700 29713 29777 29795 29811 29836 29839 29843 29853 29882 30019 30031 30036 30044 30144 30152 30160 30473 30490 30493 30533 30725 30730 30754 30756 30770-30771 30799 30817 30825-30826 30855 30858 30866-30867 30870 30874 30885 30914 30922 30931 30947 30950 30970 31035 31053-31054 31062 31065 31087 31105 31116 31119 31139 31141 31187-31188 31220-31221 31232 31235 31261 31321 31427 31501 31516 31519 31555 31585 31716 31767 31772 31774 31790-31791 31807 31886-31887 31920 31967 31989 32194 32256 32258 32269 32398 32461 32488 32494 32623 32740 32792 32810 32817 32823 32842 32893 32901 32908 32910-32911 32914 32933 32949 32964 32983 33014 33034 33074 33085 33128 33139 33150 33157-33158 33216 33242 33259 33261 33263-33264 33292 33294 33367 33385 33407 33415 33419 33422 33431 33461 33464 33484 33503 33506 33545 33577 33580 33634 33645 33715 33751 33790 33807 33811 33823 33841 33859 33925 33937 33947 33963 34037 34080 34083 34099 34141 34144 34153 34203 34225 34314 34325 34427 34521 34533 34588 34600 34636 34717 34764 34781 34783 34801 34803 34827 34842 34850-34851 34865 34882 34912 34924 34927 34945 34952 34979 34986 35042 35084 35118 35200 35214 35236 35336-35337 35352 35360 35390 35479 35532 35581 35585 35647 35665 35704 35731 35760 35925 35972-35973 36161 36367 36411 36465 36642 36705 36745 36843 36878 36883 36919 36980 37016 37026 37090 37109 37144 37154 37188 37284 37290 37380 37386 37390 37408 37473 37479 37485 37501 37504 37506 37540 37553 37558 37574 37616 37644 37975 37983 38096 38099 38202 38206 38218 38223 38236 38239 38251 38277-38278 38355 38364 38396 38413 38486 38518 38569 38602 38630 38683 38701 38705 38721 38742 38750 38775 38791 38868 38915 38921 38959 38992 39141 39164 39208 39307 39424 39444 39464 39500 39564 39567 39810 39849 39869 39991 40027 40133 40275 40290 40301 40334 40348 40391 40406 40441 40445 40485 40580 40654 40690 40723 40807 40882 40945 40952 40954 40980 40989-40990 40992-40993 41011 41024 41026 41035 41048-41049 41057 41064 41070 41079 41118 41122 41128 41148 41159 41176 41252 41258 41261 41267 41278 41290 41292 41294-41295 41302 41304 41310-41311 41315 41317 41327 41335 41340 41345 41357 41359 41410 41481 41507 41547 41725 41731 41969 41979 42009 42022 42026 42029 42037 42054 42062 42073 42076 42079 42083-42084 42130 42253 42258 42636 42657 42660 42669 42679 42741 42865 42873 42879 42890 42892 42912 42924 42932 42942 42984-42985 43000 43130 43181 43190 43199 43210 43227 43262 43279 43292 43348-43349 43352 43360-43361 43397 43415 43418 43424 43432 43450 43487 43503 43516 43532 43563 43582 43587 43593-43595 43599 43603 43621 43632 43635 43645 43649 43676 43705 43712 43722 43732 43748 43797 43799 43826 43905 43912 43932 43942 43958 43967 43996 44000 44021 44024 44029 44035 44172 44184 44186 44204 44206 44211 44213 44238 44242 44248 44296 44298 44307 44317 44326 44350-44351 44356 44385 44421 44427 44435 44447 44449 44467 44472 44482-44483 44493-44494 44498 44505 44509 44528 44545 44550 44570 44577 44595 44602 44639 44658 44677 44699 44707 44730 44754-44755 44790 44811 44825 44847 44855 44858 45037 45055 45072 45103 45119 45131 45136 45149 45159 45169-45170 45175 45209 45259 45262 45285 45308 45321 45337 45340 45351-45352 45361 45363 45371 45373-45374 45394 45408 45410 45418 45427 45450 45454 45456 45466 45500 45502 45504 45521-45522 45524 45536-45538 45555 45564 45586 45598 45604 45612 45614 45625 45655 45690 45707 45729 45749 45768 45777 45780 45790 45798-45799 45802 45807-45808 45815 45822 45833 45891 45894-45895 45902-45903 45916 45943-45944 45950 45953 45962 45966 45973 45976 45984 45990 45994 45997 46003 46009 46026 46029 46035 46040 46053 46055 46059 46068 46083 46098 46104 46112 46115-46116 46151 46167 46178 46189 46192 46208 46215 46223 46230 46253 46258 46306 46309 46333 46363 46383 46389 46476 46540 46613 46619-46622 46632 46640 46653 46666 46706 46722 46744 46753 46755 46827 47025 47031 47053 47084 47107 47117 47127-47128 47149 47158-47159 47162 47169 47173 47181 47190 47201 47207 47223 47225 47245 47253-47254 47290 47296 47299 47309 47335 47339 47347 47351 47356 47364-47365 47373 47382-47383 47399-47400 47406 47409 47430 47432 47443 47460 47469 47487 47505 47516 47519 47527 47540 47544-47545 47570 47574-47576 47594 47622 47629 47638 47641 47646 47666 47670 47673 47675 47679 47708 47743 47764 47801 47831 47853 47864 47901 47913 47939-47940 47942 47955 47965 47971 47986 47988 48020 48029 48037 48056 48068 48071 48089 48105 48121-48122 48132 48155 48162-48163 48173 48184 48187 48194 48201 48208-48209 48211 48220 48233 48267-48268 48279 48285 48311 48331 48356 48425 48434 48444 48514 48517-48518 48538 48545 48572 48577 48579-48580 48597 48603 48631 48647-48648 48659 48661 48676 48682 48687 48699 48703 48708 48834 48848-48849 48854 48861 48885 48898 48919 48925-48926 48937 48946-48947 48953 49001 49007-49008 49034 49047 49051 49066 49081 49089 49096 49146https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/683/L11?format=asciidefaultJ/A+A/683/L11/catalogGaia RVS VMP catalogue (table 1)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR3Gaia DR3 source_idmeta.id;meta.mainRA_ICRSRight ascension (ICRS) at Ep=2026.0degpos.eq.ra;meta.mainDE_ICRSDeclination (ICRS) at Ep=2026.0degpos.eq.dec;meta.mainG0magGaia G magnitude corrected for extinctionmagphot.mag;em.optdoubleBP0magGaia BP magnitude corrected for extinctionmagphot.mag;em.opt.BdoubleRP0magGaia RP magnitude corrected for extinctionmagphot.mag;em.opt.RdoubleplxGaia parallaxmaspos.parallax.trigfloate_plxGaia parallax errormasstat.error;pos.parallaxfloatsnrSNR of Gaia RVS spectrastat.snrdoublevoffsetVelocity offset from rest frame correctionkm/sphys.veloc;arith.diffdoublee_voffsetUncertainty on velocity offset from rest frame correctionkm/sstat.errordoubleEW1Equivalent width of Ca triplet line 1nmspect.line.eqWidthdoublee_EW1Error on equivalent width of Ca triplet line 1nmstat.errordoubleEW2Equivalent width of Ca triplet line 2nmspect.line.eqWidthdoublee_EW2Error on equivalent width of Ca triplet line 2nmstat.errordoubleEW3Equivalent width of Ca triplet line 3nmspect.line.eqWidthdoublee_EW3Error on equivalent width of Ca triplet line 3nmstat.errordouble[Fe/H]Spectroscopic metallicityphys.abund.Zdoublee_[Fe/H]? Measurement error on spectroscopic metallicitystat.error;phys.abund.FedoublenullableSimbadSimbad column added by the CDSmeta.ref.urlchar