J/A+A/627/A177ivo://CDS.VizieR/J/A+A/627/A177doi:10.26093/cds/vizier.36270177CDSReggiani H.Amarsi A.M.Lind K.Barklem P.S.Zatsarinny O.,Bartschat K.Fursa D.V.Bray I.Spina L.Melendez J.2021-04-16T08:07:33Z2019-07-22T12:42:22ZCDS support team

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

cds-question@unistra.frlate-type-starschemical-abundancesOlder models of Galactic chemical evolution (GCE) predict [K/Fe] ratios as much as 1dex lower than those inferred from stellar observations. Abundances of potassium are mainly based on analyses of the 7698{AA} resonance line, and the discrepancy between GCE models and observations is in part caused by the assumption of local thermodynamic equilibrium (LTE) in spectroscopic analyses. We study the statistical equilibrium of KI, focusing on the non-LTE effects on the 7698{AA} line. We aim to determine how non-LTE abundances of potassium can improve the analysis of its chemical evolution, and help to constrain the yields of GCE models. We construct a new model KI atom that employs the most up-to-date atomic data. In particular, we calculate and present inelastic e+K collisional excitation cross-sections from the convergent close-coupling (CCC) and the B-Spline R-matrix (BSR) methods, and H+K collisions from the two-electron model (LCAO). We constructed a fine, extended grid of non-LTE abundance corrections based on 1D MARCS models that span 4000<Teff/=K<8000, 0.50<logg<5.00, -5.00<[Fe/H]<+0.50, and applied the corrections to potassium abundances extracted from the literature.2019A&A...627A.177Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/627/A177CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/627/A177https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/627/A177http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/627/A177https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/627/A177https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/627/A177http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/627/A177GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/627/A177/abund (LTE and NLTE stellar abundances (Table A1))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/627/A177/abund?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/627/A177/abund?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/627/A177/abund?GETtext/xml+votable180.050000true243.9052933-8.36943940.0055555555555555566/798 2366 2497 5522 6087 6159 6256 6348 7540 8244 8328 10400 10404 12621 12704 13628 16115 16456 16540 16665 16821 17136 17343 17642 18373 18503 18587 18683 18719 18788 19070 19083 20593 20701 22205 22662 23013 23230 23978 24312 25595 26347 26457 26589 26809 27162 27330 27750 28336 30577 30878 30894 30913 31334 31433 32352 33470 33633 33642 33707 34600 34606 34684 34762 35072 35649 35772-35773 35784 35875 36365 36628 36705 39570 43360 43445 44892 45401 45463 45470 45694 45790 45808 45818 45825 46532 46540 46646 46704 46734 46780 46796 47137 47204 47389 47483 47698 48221 48223 48310 48501 48660 48798 48824 48937https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/627/A177?format=asciidefaultJ/A+A/627/A177/abundLTE and NLTE stellar abundances (Table A1)SimbadNameSimbad column added by the CDSmeta.idcharStarStar namemeta.id;meta.maincharTeffEffective temperatureKphys.temperature.effectiveintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintloggSurface Gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]Metallicityphys.abund.ZfloatvtMicroturbulence velocitykm/sphys.veloc.microTurbfloatAKnlteNon-LTE potassium abundance A(K)phys.abundfloatAKlteLTE potassium abundance A(K)phys.abundfloat_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/627/A177/nltegridNLTE correction grid (update, 16-Apr-2021)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTeffEffective temperatureKphys.temperature.effectiveintloggSurface Gravitylog(cm.s**-2)phys.gravityfloat[Fe/H]Metallicityphys.abund.ZfloatvtMicroturbulence velocitykm/sphys.veloc.microTurbintAKlteLTE potassium abundance A(K)phys.abundfloatlineLinemeta.id;spect.lineintEWnlteNon-LTE equivalent width0.1nmspect.line.eqWidthdoubleEWlteLTE equivalent width0.1nmspect.line.eqWidthdoublecorrCorrectionarith.factorfloatJ/A+A/627/A177/statesK statesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIndexState indexmeta.idintStateStatephyschargStatistical weightstat.weight;phys.atmolintEnergyExcitation energyeVphys.atmol.excitationfloatJ/A+A/627/A177/bsrrae+K excitation BSR rate coefficientsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinti1Index of the initial statemeta.idinti2Index of the final statemeta.idintTTemperatureKphys.temperatureintqRate coefficientarith.rate;phys.atmol.collisionalcharJ/A+A/627/A177/bsriorae+K ionization BSR rate coefficientsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinti1Index of the initial statemeta.idintTTemperatureKphys.temperatureintqRate coefficientarith.rate;phys.atmol.collisionalcharJ/A+A/627/A177/ccciorae+K ionization CCC rate coefficientsi1Index of the initial statemeta.idintTTemperatureKphys.temperatureintqRate coefficientarith.rate;phys.atmol.collisionalcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ/A+A/627/A177/cccrae+K excitation CCC rate coefficientsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinti1Index of the initial statemeta.idinti2Index of the final statemeta.idintTTemperatureKphys.temperatureintqRate coefficientarith.rate;phys.atmol.collisionalchar