J/MNRAS/507/43ivo://CDS.VizieR/J/MNRAS/507/43doi:10.26093/cds/vizier.75070043CDSSimpson J.D.Martell S.L.Buder S.Bland-Hawthorn J.Casey A.R.,De Silva G.M.D'Orazi V.Freeman K.C.Hayden M.Kos J.Lewis G.F.,Lind K.Schlesinger K.J.Sharma S.Stello D.Zucker D.B.Zwitter T.,Asplund M.Da Costa G.Cotar K.Tepper-Garcia T.Horner J.,Nordlander T.Ting Y.-S.Wyse R.F.G. (The GALAH Collaboration)2025-07-18T20:17:05Z2024-07-23T15:28:27ZCDS support team

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

cds-question@unistra.frmilky-way-galaxydwarf-starschemically-peculiar-starsvisible-astronomyinfrared-astronomymetallicityeffective-temperatureThe European Space Agency (ESA) Gaia mission has enabled the remarkable discovery that a large fraction of the stars near the solar neighbourhood are debris from a single in-falling system, the so-called Gaia-Sausage-Enceladus (GSE). This discovery provides astronomers for the first time with a large cohort of easily observable, unevolved stars that formed in a single extragalactic environment. Here we use these stars to investigate the 'Spite plateau' - the near-constant lithium abundance observed in unevolved metal-poor stars across a wide range of metallicities (-3 < [Fe/H] < -1). Our aim is to test whether individual galaxies could have different Spite plateaus - e.g. the interstellar medium could be more depleted in lithium in a lower galactic mass system due to it having a smaller reservoir of gas. We identified 93 GSE dwarf stars observed and analysed by the GALactic Archaeology with HERMES (GALAH) survey as part of its Data Release 3 (DR3). Orbital actions were used to select samples of GSE stars, and comparison samples of halo and disc stars. We find that the GSE stars show the same lithium abundance as other likely accreted stars and in situ Milky Way stars. Formation environment leaves no imprint on lithium abundances. This result fits within the growing consensus that the Spite plateau, and more generally the 'cosmological lithium problem' - the observed discrepancy between the amount of lithium in warm, metal-poor dwarf stars in our Galaxy, and the amount of lithium predicted to have been produced by big bang nucleosynthesis - is the result of lithium depletion processes within stars.2021MNRAS.507...43Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/507/43CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/506/150 : The GALAH+ Survey DR3 (Buder+, 2021)J/MNRAS/465/3203 : GALAH observational overview (Martell+, 2017)J/MNRAS/478/4513 : GALAH Survey DR2 (Buder+, 2018)J/MNRAS/473/2004 : TESS-HERMES Survey Data Release 1 catalog (Sharma+, 2018)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)J/A+A/615/A151 : Lithium abundances in 714 F and G dwarf stars (Bensby+,2018)II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)J/MNRAS/493/5195 : Milky Way halo stars ages and kinematics (Das+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/507/43https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/507/43http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/507/43https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/507/43https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/507/43http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/507/43GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/507/43/table1 (*Stellar parameters and lithium abundances for dwarf stars belonging the Spite plateau in GALAH DR3)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/507/43/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/507/43/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/507/43/table1?GETtext/xml+votable180.050000true36.7159072-59.33548310.0055555555555555566/4247 4273 4680 4714 4875 16637 16645 17026-17027 17304 17383 17996 18034 18113 18148 18227 18435 18439 18450 18536 18648 18722 18754 18785 18787-18788 19064 19076 19245 19278 19340 19361 19364 20499 20600 20925 22420 22747 22755 22945 23132-23133 23335 23550 24592 24630 24634 24722 24766 24771 24800 25259 25462 25549 25576 25578 25627 25710 26165 26174 26251 26253 26276 26901 26983 27051 27055-27056 27170 27176 27392 27681 27695 29341 29753 30179 31221 31339 31539 31544 32843 32883 32968 32970 33018 33054 33064 33067 33086 33088 33104 33115 33132 33150 33163 33174 33219 33237 33245 33293 33295 33301 33384 33444 33460 33475 33522 33579 33664 33682 33794 33800 33873 33893 33926 33993 33995 34095 34198 34200 34206 34258 34295 34683-34684 34833 34848 34856-34857 34874 36941 37251 37508 38244 38252 38318 38373 38489 38763 38785 38799 38810 38851 38854 38926 38971 39550 39616 39959 40058 40134 40231 40265 40277 40329 40338 40405 40655 40860 41062 41080 41156 41167 41259 41261 41273 41289 41348 42618-42619 42691 42909 43183 43194 43243 43293 43296 43432 43437 43456-43457 43503 43550 43842 43849 43916 43953 44058 44121 44351 44418 44435 44438 44452 44454 44547 44679 44751 44914 44919 45151 45158 45168 45215 45251 45270 45312 45324 45349 45378 45386 45411 45450 45466 45479 45723 45858 45863 45905 45916 45938 46029 46055 46248 46625 46630 46774 47063 47104 47163 47258 47360 47386 47397 47432 47547 47570 48173 48194-48195 48246 48249 48257 48385 48394 48440 49049https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/507/43?format=asciiOpticalInfrareddefaultJ/MNRAS/507/43/table1*Stellar parameters and lithium abundances for dwarf stars belonging the Spite plateau in GALAH DR3SimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASS2MASS identifier (rstar_id) (1)meta.id;meta.maincharGALAHGALAH identifier (sobject_id) (2)meta.idGaiaEDR3Gaia EDR3 source identifier (dr3_source_id) (3)meta.idTeffSpectroscopic effective temperature (teff)Kphys.temperature.effectiveintloggSurface gravity (logg)log(cm.s**-2)phys.gravityfloat[Fe/H]Fe atomic abundance from Fe lines (final, 1D-NLTE) (fe_h_)log(Sun)phys.abund.FefloatALiLithium abundance from synthesis of the 6708 {AA} Li line and includes non-local thermodynamic equilibrium (LTE) corrections (a_li) (4)log(Sun)phys.abundfloatGroupStellar group classification (5)meta.idchar_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