J/ApJ/900/106ivo://CDS.VizieR/J/ApJ/900/106doi:10.26093/cds/vizier.19000106CDSOu X.Roederer I.U.Sneden C.Cowan J.J.Lawler J.E.Shectman S.A.,Thompson I.B.2022-10-04T11:58:23Z2022-01-13T13:02:00ZCDS support team

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

cds-question@unistra.frchemical-abundanceschemically-peculiar-starsvisible-astronomyspectroscopyWe present vanadium (V) abundances for 255 metal-poor stars derived from high-resolution optical spectra from the Magellan Inamori Kyocera Echelle spectrograph on the Magellan Telescopes at Las Campanas Observatory, the Robert G. Tull Coude Spectrograph on the Harlan J. Smith Telescope at McDonald Observatory, and the High Resolution Spectrograph on the Hobby-Eberly Telescope at McDonald Observatory. We use updated VI and VII atomic transition data from recent laboratory studies, and we increase the number of lines examined (from one to four lines of VI, and from two to seven lines of VII). As a result, we reduce the V abundance uncertainties for most stars by more than 20% and expand the number of stars with V detections from 204 to 255. In the metallicity range -4.0<[Fe/H]{<}-1.0, we calculate the mean ratios [VI/FeI]=-0.10+/-0.01 ({sigma}=0.16) from 128 stars with >=2VI lines detected, [VII/FeII]=+0.13+/-0.01 ({sigma}=0.16) from 220 stars with >=2 VII lines detected, and [VII/VI]=+0.25+/-0.01 ({sigma}=0.15) from 119 stars. We suspect that this offset is due to departures from local thermodynamic equilibrium, and we recommend using [VII/FeII], which is enhanced relative to the solar ratio, as a better representation of [V/Fe]. We provide more extensive evidence for abundance correlations detected previously among scandium, titanium, and vanadium, and we identify no systematic effects in the analysis that can explain these correlations.2020ApJ...900..106Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/900/106CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/354/169 : Metal-poor field stars abundances (Gratton+, 2000)J/A+A/416/1117 : Abundances in the early Galaxy (Cayrel+, 2004)J/ApJ/608/405 : Explosive yields of massive star (Chieffi+, 2004)J/A+A/439/129 : HERES II. Spectroscopic analysis (Barklem+, 2005)J/ApJ/681/1524 : Detailed abundances for 28 metal-poor stars (Lai+, 2008)J/AJ/141/175 : Abundances in M15 RGB/RHB stars (Sobeck+, 2011)J/ApJ/762/26 : Most metal-poor stars. II. Galactic halo stars (Yong+, 2013)J/ApJS/211/31 : Atomic data of vanadium (V I) (Wang+, 2014)J/ApJS/215/20 : Vanadium log(gf) and transition probabilities (Lawler+, 2014)J/AJ/147/136 : Stars of very low metal abundance. VI. (Roederer+, 2014)J/ApJS/214/18 : VII log(gf) values, and V abundance in HD 84937 (Wood+ 2014)J/ApJ/817/53 : Fe-group elemental abund. analysis in HD84937 (Sneden+, 2016)J/ApJS/224/35 : New lifetimes and log(gf) for vanadium (V I) (Holmes+, 2016)J/ApJS/231/18 : Energy levels of vanadium (V I) (Saloman+, 2017)J/ApJS/231/19 : Energy levels of ionized vanadium (V II) (Saloman+, 2017)J/ApJ/860/125 : Six warm metal-poor stars iron abundances (Roederer+, 2018)J/ApJ/870/2 : Spherical symmetry. III. (Curtis+, 2019)J/ApJ/890/119 : Iron element abund. in 3 very metal-poor stars (Cowan+, 2020)J/A+A/654/A118 : Vanadium measurements for 135 M dwarfs (Shan+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/900/106https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/900/106http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/900/106https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/900/106https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/900/106http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/900/106GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/900/106/table4 (Final abundances)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/900/106/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/900/106/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/900/106/table4?GETtext/xml+votable180.050000true194.83304449.24323190.0055555555555555566/146 232 798 2426 4694 5111 5545 5555 6051 6159 6256 6348 6747 7456 7798 8093 8367 9162 9992 10404 10943 11123 11363 11920 11971 12397 12621 12704 12793 13020 13028 13628 13718 13829-13830 14385 16115 16433 16451 16456 16462 16473 16496 16501 16514 16566 16587 16609 16663 16665-16666 16679 16854 17136 17159-17160 17343 17353 17357 17370 17380-17381 17392 17420 17460 17492 17495 17564 17642 17734 17811 18483 18503 18511 18514 18578 18582 18587 18683 18707 18715 18719 18764 18768 18778 18788 18972 19017 19083 22205 22662 22664 23192 23892 23978 24685 25116 25595 25639 25656 25702 25733 25753 25755 26025 26347 26457 26534 26589 26658 27162 27330 27693 28336 29703 30577 30891 30913 30963 31291 31377 31383 31398 31418-31419 31427 31447 31543 31585 31595 31642 32468 32593 32889 33249 33470 33515 33526-33527 33596 33633 33635 33642 33696 33707-33708 34012 34232 34595 34600 34606 34684 34708 34749 34751 34762 34816 35072 35517 35532 35553 35561 35599 35649 35750 35752 35768 35772-35773 35775 35786 35875 36135 36193 36221 36365 36628 36690 36737 36745 36799 36813 36837 43360 43445 44208 44268 44281 44575 44625 44892 45017 45395 45397 45401 45404 45460 45463 45468 45470 45489 45491 45504 45514 45746 45753 45773 45790 45796-45797 45801 45804 45825 45859 45868 45881 46023 46080 46090 46370 46399 46446 46462 46532 46540 46554 46563 46565 46575 46580 46642 46646 46662-46663 46665 46668 46676 46686 46691 46695 46699 46704-46705 46760 46780 46796 46851 47014 47018 47092 47193 47204 47216-47217 47306 47344 47389 47421 47436 47458-47459 47472 47476 47478 47483 47518-47519 47540 47556 47558 47698 48129 48138 48145 48153 48160 48162 48173 48223 48234 48363 48375 48387-48388 48392 48501 48511 48517 48526 48544 48603 48613 48625 48660 48720 48728 48731 48734 48736 48798 48824 48862 48937 49009 49078https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/900/106?format=asciiOpticaldefaultJ/ApJ/900/106/table4Final abundancesSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the starmeta.id;meta.maincharprimaryClassEvolutionary stage (1)meta.code.classcharTeff[4320/7500] Effective temperatureKphys.temperature.effectiveintlog(g)[0.5/4.4] Surface gravitylog(cm.s**-2)phys.gravityfloat[FeI/H][-4.6/-1.08] Metallicity from neutral ironphys.abund.Zfloat[FeII/H][-4.5/-1.07] Metallicity from ionized ironphys.abund.Zfloatl_[VI/FeI][0/1] Upper limit flag for neutral vanadium (2)meta.code.errorintlamULVI[4111.7/4408.2]? Wavelength of the line setting the upper limit0.1nmem.wldoublenullable[VI/FeI][-0.61/1.75] Neutral vanadium abundancephys.abundfloate_[VI/FeI][0.09/0.32]? Uncertainty of [VI/FeI]stat.errorfloatnullableNVI[0/4] Number of neutral lines usedmeta.numberintl_[VII/FeII][0/1] Upper limit flag for ionized vanadium (2)meta.code.errorintlamULVII[3517.29/4023.4]? Wavelength of the line setting the upper limit0.1nmem.wldoublenullable[VII/FeII][-0.5/1.63] Ionized vanadium abundancephys.abundfloate_[VII/FeII][0.13/0.43]? Uncertainty of [VII/FeII]stat.errorfloatnullableNVII[0/7] Number of ionized lines usedmeta.numberint_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/ApJ/900/106/table2Abundances derived from neutral vanadium linesNameName of the starmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[4111.7/4408.2] Line wavelength in Angstroms0.1nmem.wl;spect.linedoublelog(eps)[-0.31/2.77] Log epsilon vanadium abundancephys.abundfloate_log(eps)[0.05/0.5] Fitting uncertainty of log(eps)stat.errorfloatJ/ApJ/900/106/table3Abundances derived from ionized vanadium linesNameName of the starmeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambda[3517.29/4023.4] Line wavelength in Angstroms0.1nmem.wl;spect.linedoublelog(eps)[-0.2/3.02] Log epsilon vanadium abundancephys.abundfloate_log(eps)[0.06/0.51] Fitting uncertainty of log(eps)stat.errorfloat