J/ApJ/817/53ivo://CDS.VizieR/J/ApJ/817/53doi:10.26093/cds/vizier.18170053CDSSneden C.Cowan J.J.Kobayashi C.Pignatari M.Lawler J.E.,Den Hartog E.A.Wood M.P.2017-01-23T22:00:00Z2016-04-27T15:42:24ZCDS support team

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

cds-question@unistra.frchemical-abundanceschemically-peculiar-starsspectroscopyWe have derived new, very accurate abundances of the Fe-group elements Sc through Zn (Z=21-30) in the bright main-sequence turnoff star HD84937 based on high-resolution spectra covering the visible and ultraviolet spectral regions. New or recent laboratory transition data for 14 species of seven elements have been used. Abundances from more than 600 lines of non-Fe species have been combined with about 550 Fe lines in HD84937 to yield abundance ratios of high precision. The abundances have been determined from both neutral and ionized transitions, which generally are in agreement with each other. We find no substantial departures from the standard LTE Saha ionization balance in this [Fe/H]=-2.32 star. Noteworthy among the abundances are [Co/Fe]=+0.14 and [Cu/Fe]=-0.83, in agreement with past studies of abundance trends in this and other low-metallicity stars, and <[Sc,Ti,V/Fe]>=+0.31 which has not been noted previously. A detailed examination of scandium, titanium, and vanadium abundances in large-sample spectroscopic surveys reveals that they are positively correlated in stars with [Fe/H]<-2; HD84937 lies at the high end of this correlation. These trends constrain the synthesis mechanisms of Fe-group elements. We also examine the Galactic chemical evolution abundance trends of the Fe-group elements, including a new nucleosynthesis model with jet-like explosion effects.2016ApJ...817...53Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/817/53CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/577/A9 : Sc, V, Mn, and Co in Milky Way stars (Battistini+, 2015)J/ApJS/220/13 : Co I transition probabilities (Lawler+, 2015)J/ApJS/215/23 : FeI lifetimes & branching fractions (Den Hartog+, 2014)J/ApJS/215/20 : Vanadium log(gf) and transition probabilities (Lawler+, 2014)J/A+A/571/A47 : Extensive linelist of CH in stellar atm. (Masseron+, 2014)J/ApJS/214/26 : Line lists for CN isotopes transitions (Sneden+, 2014)J/ApJS/214/18 : VII log(gf) values, and V abundance in HD 84937 (Wood+ 2014)J/MNRAS/441/3127 : FeI oscillator strengths for Gaia-ESO (Ruffoni+, 2014)J/AJ/147/136 : Stars of very low metal abundance. VI. (Roederer+, 2014)J/ApJS/211/20 : NiI transition probability measurements (Wood+, 2014)J/ApJS/211/5 : Improved line data for the Swan system ^12^C^13^C (Ram+, 2014)J/ApJS/210/23 : Line intensities in CN transitions (Brooke+, 2014)J/ApJ/778/56 : Hamburg/ESO Survey extremely metal-poor stars (Cohen+, 2013)J/ApJS/208/27 : Sun and HD 84937 TiII log(gf) and abundances (Wood+, 2013)J/ApJS/207/26 : MgH in the A^2^{Pi}-X^2^{Sigma}^+^ system (Hinkle+, 2013)J/A+A/554/A96 : Spectra of LiI(670.8nm) line in metal-poor stars (Lind+, 2013)J/ApJ/764/21 : Stellar evolutionary models with 13-120Msun (Chieffi+, 2013)J/ApJ/762/26 : Most metal-poor stars. II. Galactic halo stars (Yong+, 2013)J/ApJS/194/35 : Atomic transition probabilities of Mn (Den Hartog+, 2011)J/ApJ/724/341 : Nucleosynthesis of massive metal-free stars (Heger+, 2010)J/A+A/511/A68 : Transitions of CrII (Gurell+, 2010)J/ApJS/182/80 : Rare earth abundances (Sneden+, 2009)J/ApJS/182/51 : Rare earth element transition probabilities (Lawler+, 2009)J/ApJ/667/1267 : CrI transition probabilities (Sobeck+, 2007)J/A+A/467/665 : Manganese abundances in the Galactic disk (Feltzing+, 2007)J/A+A/439/129 : HERES II. Spectroscopic analysis (Barklem+, 2005)J/A+A/416/1117 : Abundances in the early Galaxy (Cayrel+, 2004)J/AJ/128/2402 : Extremely metal-poor star candidates abundances (Lai+, 2004)J/A+A/404/187 : Equivalent widths for metal-poor stars (Gratton+, 2003)J/MNRAS/340/304 : [X/Fe] of Galactic disc F and G dwarfs (Reddy+, 2003)J/A+A/377/361 : Fe II transition probabilities and loggf (Pickering+, 2001)J/ApJ/562/528 : Teff and log(g) of low-metallicity stars (Snider+, 2001)J/AJ/120/1841 : Abundances & Kinematics of Halo & Disk Stars (Fulbright 2000)J/A+AS/129/237 : G and K dwarfs abundances (Feltzing+ 1998)J/AJ/90/2089 : Stars of very low metal abundance. I (Beers+, 1985)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/817/53https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/817/53http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/817/53https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/817/53https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/817/53http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/817/53GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/ApJ/817/53/table3Line Abundances for FeI and FeIIrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlamAir[2297.7/8824.3] Wavelength in air; Angstroms0.1nmem.wl;phys.atmol.transitiondoublespeciesSpecies designationmeta.id;meta.maincharchi[0/6] Lower excitation energyeVphys.atmol.excitation;stat.mindoublelog(gf)[-5/0.7] Log of the gf valuestat.value;phys.absorption.coefffloatRefSource of the gf value (1)meta.bibcharlog(e)S[3/7.7]? Abundance in the Sunphys.abundfloatnullablelog(e)[1/5.4]? Abundance in HD 84937phys.abundfloatnullableJ/ApJ/817/53/table4Line Abundances for Other Fe-Group SpeciesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlamAir[2297.7/8824.3] Wavelength in air; Angstroms0.1nmem.wl;phys.atmol.transitiondoublespeciesSpecies designationmeta.id;meta.maincharchi[0/6] Lower excitation energyeVphys.atmol.excitation;stat.mindoublelog(gf)[-5/0.7] Log of the gf valuestat.value;phys.absorption.coefffloatRefSource of the gf value (1)meta.bibcharlog(e)S[3/7.7]? Abundance in the Sunphys.abundfloatnullablef_log(e)S[n] n=nometa.codecharlog(e)[1/5.4]? Abundance in HD 84937phys.abundfloatnullable