J/MNRAS/449/3889ivo://CDS.VizieR/J/MNRAS/449/3889doi:10.26093/cds/vizier.74493889CDSRoederer I.U.Thompson I.B.2024-08-14T20:21:18Z2019-12-03T07:29:35ZCDS support team

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

cds-question@unistra.frglobular-star-clustersgiant-starsline-intensitieschemical-abundancesWe have observed 15 red giant stars in the relatively massive, metal-poor globular cluster NGC 4833 using the Magellan Inamori Kyocera Echelle spectrograph at Magellan. We calculate stellar parameters for each star and perform a standard abundance analysis to derive abundances of 43 species of 39 elements, including 20 elements heavier than the iron group. We derive <[Fe/H]>=-2.25+/-0.02 from FeI lines and <[Fe/H]>=-2.19+/-0.013 from FeII lines. We confirm earlier results that found no internal metallicity spread in NGC 4833, and there are no significant star-to-star abundance dispersions among any elements in the iron group (19=<Z=<30). We recover the usual abundance variations among the light elements C, N, O, Na, Mg, Al, and possibly Si. The heavy-element distribution reflects enrichment by r-process nucleosynthesis ([Eu/Fe]=+0.36+/-0.03), as found in many other metal-poor globular clusters. We investigate small star-to-star variations found among the neutron-capture elements, and we conclude that these are probably not real variations. Upper limits on the Th abundance, log{epsilon} (Th/Eu)<-0.47+/-0.09, indicate that NGC 4833, like other globular clusters where Th has been studied, did not experience a so-called actinide boost.2015MNRAS.449.3889Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/449/3889CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/109/479 : NGC 4833 BV photometry (Samus+, 1995)J/ApJ/645/613 : Abundances of HD 221170 (Ivans+, 2006)J/ApJS/162/227 : Transition probabilities for SmII (Lawler+, 2006)J/ApJS/167/292 : Laboratory transition probabilities for Gd IIJ/ApJ/667/1267 : CrI transition probabilities (Sobeck+, 2007)J/ApJS/169/120 : Transition probabilities for HfII and Hf (Lawler+, 2007)J/ApJS/182/51 : Transition probabilities of rare earth elementsJ/ApJS/182/80 : Rare earth abundances (Sneden+, 2009)J/ApJ/742/37 : Abundances of six RGB stars in M22 (Roederer+, 2011)J/ApJS/194/35 : Atomic transition probabilities of Mn (Den Hartog+, 2011)J/ApJ/750/76 : r-process peaks elements in HD 160617 (Roederer+, 2012)J/ApJS/208/27 : Sun and HD 84937 TiII log(gf) and abundances (Wood+, 2013)J/A+A/564/A60 : NGC 4833 Na-O measured with FLAMES (Carretta+, 2014)J/ApJS/211/20 : NiI transition probability measurements (Wood+, 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)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/449/3889https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/449/3889http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/449/3889https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/449/3889https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/449/3889http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/449/3889GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/MNRAS/449/3889/table2Observing logrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharprimaryEWEquivalent widths from Table 4meta.ref.urlcharAbunddisplay abundances in Tables 5-6 for this starmeta.ref.urlcharSlit[0.7/1] Slit widtharcsecspect.line.widthfloatDateDate of observationtime.epochnullableTimeStart of the exposure, UT (hh:mm)time.epochnullableTexp[1200/7200] Exposure timestime.duration;obs.exposureintHRV[187.9/297.6] Heliocentric radial velocitykm/sspect.dopplerVeloc;pos.heliocentricfloatJ/MNRAS/449/3889/table4Atomic data and equivalent widthsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWave[3694.2/7836.13] Wavelength ({AA})0.1nmem.wlfloatID[3/90.1] Species (1)phys.atmol.ionStagefloatExPot[0/9.14] Excitation potentialeVphys.atmol.excitationfloatlog(gf)[-9.78/0.65] Log of degeneracy times oscillator strengthphys.atmol.oscStrengthfloatr_log(gf)[1/40] Literature reference for log(gf) (2)meta.ref;pos.frameintEW(2-185)[5.6/176.5]? Equivalent width in milli Angstroms for star 2-1850.1pmspect.line.eqWidthfloatnullablen_EW(2-185)[ls] Note on EW(2-185) (3)meta.notecharEW(2-277)[6.2/155.4]? Equivalent width in milli Angstroms for star 2-2770.1pmspect.line.eqWidthfloatnullablen_EW(2-277)[ls] Note on EW(2-277) (3)meta.notecharEW(2-882)[9.5/165.3]? Equivalent width in milli Angstroms for star 2-8820.1pmspect.line.eqWidthfloatnullablen_EW(2-882)[ls] Note on EW(2-882) (3)meta.notecharEW(2-918)[4.3/165.3]? Equivalent width in milli Angstroms for star 2-9180.1pmspect.line.eqWidthfloatnullablen_EW(2-918)[ls] Note on EW(2-918) (3)meta.notecharEW(2-1578)[6.6/176.7]? Equivalent width in milli Angstroms for star 2-15780.1pmspect.line.eqWidthfloatnullablen_EW(2-1578)[ls] Note on EW(2-1578) (3)meta.notecharEW(2-1664)[6.3/178.8]? Equivalent width in milli Angstroms for star 2-16640.1pmspect.line.eqWidthfloatnullablen_EW(2-1664)[ls] Note on EW(2-1664) (3)meta.notecharEW(3-742)[7/222.2]? Equivalent width in milli Angstroms for star 3-7420.1pmspect.line.eqWidthfloatnullablen_EW(3-742)[ls] Note on EW(3-742) (3)meta.notecharEW(3-772)[14.4/178.3]? Equivalent width in milli Angstroms for star 3-7720.1pmspect.line.eqWidthfloatnullablen_EW(3-772)[ls] Note on EW(3-772) (3)meta.notecharEW(3-1509)[6.2/184]? Equivalent width in milli Angstroms for star 3-15090.1pmspect.line.eqWidthfloatnullablen_EW(3-1509)[ls] Note on EW(3-1509) (3)meta.notecharEW(4-224)[5/198]? Equivalent width in milli Angstroms for star 4-2240.1pmspect.line.eqWidthfloatnullablen_EW(4-224)[ls] Note on EW(4-224) (3)meta.notecharEW(4-341)[5/195.1]? Equivalent width in milli Angstroms for star 4-3410.1pmspect.line.eqWidthfloatnullablen_EW(4-341)[ls] Note on EW(4-341) (3)meta.notecharEW(4-464)[7.7/166.6]? Equivalent width in milli Angstroms for star 4-4640.1pmspect.line.eqWidthfloatnullablen_EW(4-464)[ls] Note on EW(4-464) (3)meta.notecharEW(4-1255)[4.4/213.7]? Equivalent width in milli Angstroms for star 4-12550.1pmspect.line.eqWidthfloatnullablen_EW(4-1255)[ls] Note on EW(4-1255) (3)meta.notecharEW(4-1398)[4.4/186.6]? Equivalent width in milli Angstroms for star 4-13980.1pmspect.line.eqWidthfloatnullablen_EW(4-1398)[ls] Note on EW(4-1398) (3)meta.notecharEW(4-1706)[6.9/150.6]? Equivalent width in milli Angstroms for star 4-17060.1pmspect.line.eqWidthfloatnullablen_EW(4-1706)[ls] Note on EW(4-1706) (3)meta.notecharJ/MNRAS/449/3889/table5Abundances derived from individual linesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharSpeciesSpecies of the transitionphys.atmol.transProb;phys.atmol.transitioncharWave[3694.2/7836.13] Wavelength ({AA})0.1nmem.wlfloatl_logeps[<] Flag for upper limit on logepsmeta.code.errorcharlogeps[-1.98/7.7] Log epsilon abundancephys.abundfloate_logeps[0.08/1.61]? Error in log epsilon abundancestat.errorfloatnullableJ/MNRAS/449/3889/table6Mean abundances in each starNameStar namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSpeciesSpeciesmeta.notecharNum[0/116] Number of lines usedmeta.numberintl_logeps[<] Flag for upper limit on logepsmeta.code.errorcharlogeps[-1.98/7.33]? Log epsilon abundancephys.abundfloatnullable[X/Fe][-2.46/3.95]? Abundance relative to Fe I or Fe II (1)phys.abundfloatnullables_[X/Fe][0.02/1.31]? Statistical uncertainty in [X/Fe]stat.errorfloatnullablee_[X/Fe][0.08/1.31]? Total uncertainty in [X/Fe]stat.error;phys.abundfloatnullablee2_[X/Fe][0/1.31]? Neutrals uncertainty in [X/Fe]stat.errorfloatnullablee3_[X/Fe][0/1.32]? Ions uncertainty in [X/Fe]stat.errorfloatnullable