J/A+A/697/A127ivo://CDS.VizieR/J/A+A/697/A127doi:10.26093/cds/vizier.36970127CDSHansen T.T.Roederer I.U.Shah S.P.Ezzeddine R.Beers T.C.Frebel A.,Holmbeck E.M.Placco V.M.Sakari C.M.Ji A.Marshall J.L.Mardini M.K.,Chiti A.2025-10-10T20:01:07Z2025-05-14T12:17:53ZCDS support team

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

cds-question@unistra.fratomic-physicsOver the past few years, the R-Process Alliance (RPA) has successfully carried out a search for stars that are highly enhanced in elements produced via the rapid neutron-capture (r-) process. In particular, the RPA has identified a number of relatively bright, highly r-process-enhanced (r-II) stars, suitable for observations with the Hubble Space Telescope (HST), facilitating abundance derivation of elements such as gold (Au) and cadmium (Cd) This paper presents the detailed abundances derived for the metal-poor ([Fe/H]=-2.55) highly r-process-enhanced ([Eu/Fe]=+1.29) r-II star 2MASS J05383296-5904280. 1D LTE elemental abundances are derived via equivalent width and spectral synthesis using high-resolution high signal-to-noise near-UV HST/STIS and optical Magellan/MIKE spectra. Abundances are determined for 43 elements, including 26 neutron-capture elements. In particular, abundances of the rarely studied elements Nb, Mo, Cd, Lu, Os, Pt, and Au are derived from the HST spectrum. These results, combined with RPA near-UV observations of two additional r-II stars, increase the number of Cd abundances derived for r-process-enriched stars from seven to ten and Au abundances from four to seven. A large star-to-star scatter is detected for both of these elements, highlighting the need for more detections enabling further investigations, specifically into possible non-LTE (local thermodynamical equilibrium) effects.2025A&A...697A.127Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/697/A127CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/697/A127https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/697/A127http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/697/A127https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/697/A127https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/697/A127http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/697/A127GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/697/A127/tablea1Atomic data and abundances for individual lines analysedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWaveWavelength in Angstroms0.1nmem.wlfloatIDSpeciesmeta.id;meta.maincharExPotExcitation PotentialeVphys.atmol.excitationfloatlog(gf)Log of oscillator strengthphys.atmol.oscStrengthfloatn_EW[s] s for synthmeta.notecharEW? Equivalenth width in mili angstroms0.1pmspect.line.widthfloatnullableloge(X)Log epsilon abundance of element Xphys.abund.XfloatRefReference (1)meta.ref;pos.frameint