J/ApJ/874/148ivo://CDS.VizieR/J/ApJ/874/148doi:10.26093/cds/vizier.18740148CDSSakari C.M.Roederer I.U.Placco V.M.Beers T.C.Ezzeddine R.,Frebel A.Hansen T.Sneden C.Cowan J.J.Wallerstein G.Farrell E.M.,Venn K.A.Matijevic G.Wyse R.F.G.Bland-Hawthorn J.Chiappini C.,Freeman K.C.Gibson B.K.Grebel E.K.Helmi A.Kordopatis G.Kunder A.,Navarro J.Reid W.Seabroke G.Steinmetz M.Watson F.2021-09-08T06:54:17Z2020-09-28T14:45:01ZCDS support team

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

cds-question@unistra.frchemical-abundancesline-intensitieschemically-peculiar-starshalo-starsvisible-astronomyspectroscopyA new moderately r-process-enhanced metal-poor star, RAVEJ093730.5-062655, has been identified in the Milky Way halo as part of an ongoing survey by the R-Process Alliance. The temperature and surface gravity indicate that J0937-0626 is likely a horizontal branch star. At [Fe/H]=-1.86, J0937-0626 is found to have subsolar [X/Fe] ratios for nearly every light, {alpha}, and Fe-peak element. The low [{alpha}/Fe] ratios can be explained by an ~0.6dex excess of Fe; J0937-0626 is therefore similar to the subclass of "iron-enhanced" metal-poor stars. A comparison with Milky Way field stars at [Fe/H]=-2.5 suggests that J0937-0626 was enriched in material from an event, possibly a Type Ia supernova, that created a significant amount of Cr, Mn, Fe, and Ni and smaller amounts of Ca, Sc, Ti, and Zn. The r-process enhancement of J0937-0626 is likely due to a separate event, which suggests that its birth environment was highly enriched in r-process elements. The kinematics of J0937-0626, based on Gaia DR2 data, indicate a retrograde orbit in the Milky Way halo; J0937-0626 was therefore likely accreted from a dwarf galaxy that had significant r-process enrichment.2019ApJ...874..148Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/874/148CatalogResearchIsServedByTAP VizieR generic servicerelated-toIII/279 : RAVE 5th data release (Kunder+, 2017)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/A+A/422/527 : Metal-poor star uvby-beta photometry. X. (Schuster+, 2004)J/AJ/128/1177 : Galactic stellar abundances (Venn+, 2004)J/ApJ/636/821 : Abundances of Baade's Window K giants (Fulbright+, 2006)J/MNRAS/367/1329 : Elemental abundances for 176 stars (Reddy+, 2006)J/ApJS/168/128 : UBVRcIc photom. of FHB and metal-poor stars (Beers+, 2007)J/A+A/512/A54 : Teff and Fbol from Infrared Flux Method (Casagrande+, 2010)J/ApJ/719/931 : Chemical evolution of the UMi dSph (Cohen+, 2010)J/ApJ/724/341 : Nucleosynthesis of massive metal-free stars (Heger+, 2010)J/A+A/511/L10 : Abundances and space velocities of 94 stars (Nissen+, 2010)J/AJ/141/175 : Abundances in M15 RGB/RHB stars (Sobeck+, 2011)J/ApJ/754/91 : Abundances and velocities of NGC 6397 stars (Lovisi+, 2012)J/ApJ/751/102 : Equivalent widths of 9 RGB in Carina dSph (Venn+, 2012)J/ApJ/778/56 : Hamburg/ESO Survey extremely metal-poor stars (Cohen+, 2013)J/ApJ/778/149 : Abundances for 3 stars in Sgr dSph (McWilliam+, 2013)J/ApJ/762/26 : Most metal-poor stars. II. Galactic halo stars (Yong+, 2013)J/AJ/148/81 : APASS BVgri photometry of RAVE stars. I. (Munari+, 2014)J/ApJ/797/21 : Carbon-enhanced metal-poor stars (Placco+, 2014)J/AJ/147/136 : Stars of very low metal abundance. VI. (Roederer+, 2014)J/ApJ/830/93 : Abund. of the Ret II brightest red giant members (Ji+, 2016)J/AJ/151/82 : The 4 brightest red giants in Ret 2 (Roederer+, 2016)J/ApJ/847/142 : Ultra-metal-poor stars LTE & NLTE abund. (Ezzeddine+, 2017)J/ApJ/844/18 : RAVE J203843.2-002333 high-resolution spec. (Placco+, 2017)J/ApJ/864/43 : Abund. of 3 bright extremely metal-poor giants (Cain+, 2018)J/ApJ/862/174 : Spectroscopy obs. of RAVE J094921.8-161722 (Gull+, 2018)J/ApJ/858/92 : RPA Southern Pilot Search of 107 Stars (Hansen+, 2018)J/ApJ/859/L8 : Properties of TriAnd stars (Hayes+, 2018)J/ApJ/852/99 : Abund. of 3 metal-poor stars in Hor I (Nagasawa+, 2018)J/AJ/155/256 : Spec. validation of RAVE metal-poor stars (Placco+, 2018)J/AJ/156/179 : Highly r-process-enhanced field stars (Roederer+, 2018)J/ApJ/865/129 : Abundance analysis of HD 222925 (Roederer+, 2018)J/ApJ/868/110 : R-Process Alliance: 1st release in Gal. halo (Sakari+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/874/148https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/874/148http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/874/148https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/874/148https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/874/148http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/874/148GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/874/148/table2Line equivalent widths or abundancesElElementphys.atmol.elementcharlog(eps)[-0.6/5.6]? log(epsilon) abundancephys.abundfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIonIonization state (I=neutral; II=ionized)phys.atmol.ionStagecharlambda[3819.6/6678] Spectral line wavelength; in Angstrom units0.1nmem.wl;spect.linefloatExPot[0/4.45] Excitation potentialeVphys.atmol.excitationfloatlog(gf)[-3.45/0.55] Log statistical weight and oscillator strengthstat.weight;phys.atmol.oscStrengthfloatEW[10.6/102]? J0937-0626 equivalent width in units of milli-Angstroms1e-13mspect.line.width;arith.ratiofloatnullableMethAnalysis type (1)meta.codechar