J/A+A/688/A123ivo://CDS.VizieR/J/A+A/688/A123doi:10.26093/cds/vizier.36880123CDSXylakis-Dornbusch T.Hansen T.T.Beers T.C.Christlieb N.Ezzeddine R.,Frebel A.Holmbeck E.Placco V.M.Roederer I.U.Sakari C.M.Sneden C.2024-11-29T20:04:38Z2024-08-13T07:31:23ZCDS support team

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

cds-question@unistra.frpeculiar-variable-starschemical-abundancesline-intensitiesIn recent years, the R-Process Alliance (RPA) has conducted a successful search for stars that are enhanced in elements produced by the rapid neutron-capture (r-)process. In particular, the RPA has uncovered a number of stars that are strongly enriched in light r-process elements, such as Sr, Y, and Zr. These so-called limited-r stars were investigated to explore the astrophysical production site(s) of these elements. We investigate the possible formation sites for light neutron-capture elements by deriving detailed abundances for neutron-capture elements from high-resolution spectra with a high signal-to-noise ratio of three limited-r stars. We conducted a kinematic analysis and a 1D local thermodynamic equilibrium spectroscopic abundance analysis of three stars. Furthermore, we calculated the lanthanide mass fraction (XLa) of our stars and of limited-r stars from the literature. We found that the abundance pattern of neutron-capture elements of limited-r stars behaves differently depending on their [Ba/Eu] ratios, and we suggest that this should be taken into account in future investigations of their abundances. Furthermore, we found that the XLa of limited-r stars is lower than that of the kilonova AT2017gfo. The latter seems to be in the transition zone between limited-r XLa and that of r-I and r-II stars. Finally, we found that unlike r-I and r-II stars, the current sample of limited-r stars is largely born in the Galaxy and is not accreted.2024A&A...688A.123Xhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/688/A123CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/688/A123https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/688/A123http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/688/A123https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/688/A123https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/688/A123http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/688/A123GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/688/A123/table3 (Stellar parameters of the target stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/688/A123/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/688/A123/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/688/A123/table3?GETtext/xml+votable180.050000true9.75083327.4260830.0055555555555555560/https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/688/A123?format=asciidefaultJ/A+A/688/A123/table3Stellar parameters of the target starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASSStar 2MASS name (JHHMMSSss+DDMMSSs)meta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainTeffEffective temperatureKphys.temperature.effectiveinte_TeffEffective temperature errorKstat.error;phys.temperature.effectiveintloggSurface gravitylog(cm.s**-2)phys.gravityfloate_loggSurface gravity errorlog(cm.s**-2)stat.errorfloat[Fe/H]Metallicityphys.abund.Zfloate_[Fe/H]Metallicity errorstat.error;phys.abund.FefloatvmicMicroturbulent velocitykm/sphys.velocfloate_vmicMicroturbulent velocity errorkm/sstat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/688/A123/table4For each absorption line the wavelength, excitation potential, loggf, EW, {sigma}_EW_, log{epsilon}, and respective referencesRef? Reference, in refs.dat filemeta.ref;pos.frame;meta.fileintnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASSStar 2MASS name (JHHMMSSss+DDMMSSs)meta.id;meta.maincharSpeciesSpeciesmeta.notecharlambdaWavelength0.1nmem.wlfloatXi? Excitation potentialeVphys.atmol.excitationfloatnullableloggf? Atomic transition probabilityphys.atmol.transProbfloatnullableEW? Equivalent width0.1pmspect.line.eqWidthfloatnullablen_EW[s] s for synthmeta.notechare_EW? Equivalent width uncertainty0.1pmstat.error;spect.line.eqWidthfloatnullablen_e_EW[s] s for synthmeta.notecharlogepsAbsolute abundance log{epsilon}phys.abundfloatJ/A+A/688/A123/refsReferencesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notecharRefReference numbermeta.id;meta.mainintprimaryJ/A+A/688/A123/tablea1The uncertainty in the abundance determination due to {DELTA}Teff, {DELTA}logg, {DELTA}{chi}, {DELTA}[M/H], and {sigma} systematicrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint2MASSStar 2MASS name (JHHMMSSss+DDMMSSs)meta.id;meta.maincharElementElementphys.atmol.elementcharDTeffUncertainty in TeffKstat.errorfloatDloggUncertainty in logglog(cm.s**-2)stat.errorfloatDchiUncertainty in microturbulence velocitykm/sstat.errorfloatD[M/H]Uncertainty uncertainty in metallicitystat.errorfloatesysSystematic uncertaintystat.error.sysfloat