J/ApJ/925/66ivo://CDS.VizieR/J/ApJ/925/66doi:10.26093/cds/vizier.19250066CDSde los Reyes M.A.C.Kirby E.N.Ji A.P.Nunez E.H.2024-10-18T20:13:09Z2023-10-02T07:57:34ZCDS support team

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

cds-question@unistra.frchemical-abundancesdwarf-galaxiesastronomical-modelsvisible-astronomyspectroscopyWe demonstrate that using up to seven stellar abundance ratios can place observational constraints on the star formation histories (SFHs) of Local Group dSphs, using Sculptor dSph as a test case. We use a one-zone chemical evolution model to fit the overall abundance patterns of {alpha} elements (which probe the core-collapse supernovae that occur shortly after star formation), s-process elements (which probe AGB nucleosynthesis at intermediate delay times), and iron-peak elements (which probe delayed Type Ia supernovae). Our best-fit model indicates that Sculptor dSph has an ancient SFH, consistent with previous estimates from deep photometry. However, we derive a total star formation duration of ~0.9Gyr, which is shorter than photometrically derived SFHs. We explore the effect of various model assumptions on our measurement and find that modifications to these assumptions still produce relatively short SFHs of duration <~1.4Gyr. Our model is also able to compare sets of predicted nucleosynthetic yields for supernovae and AGB stars, and can provide insight into the nucleosynthesis of individual elements in Sculptor dSph. We find that observed [Mn/Fe] and [Ni/Fe] trends are most consistent with sub-MCh Type Ia supernova models, and that a combination of "prompt" (delay times similar to core-collapse supernovae) and "delayed" (minimum delay times >~50Myr) r-process events may be required to reproduce observed [Ba/Mg] and [Eu/Mg] trends.2022ApJ...925...66Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/925/66CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/617/1091 : La and Eu abundances in 85 stars (Simmerer+, 2004)J/ApJS/191/352 : Abundances in stars of MW dwarf satellites (Kirby+, 2010)J/ApJ/779/102 : Metallicities of RGB stars in dwarf galaxies (Kirby+, 2013)J/ApJ/797/21 : Carbon-enhanced metal-poor stars (Placco+, 2014)J/ApJ/789/147 : Star formation histories of LG dwarf galaxies (Weisz+, 2014)J/ApJ/801/125 : Carbon in red giants in GCs and dSph galaxies (Kirby+, 2015)J/MNRAS/449/761 : EWs of metal-poor stars in UMi I dSph galaxy (Ural+, 2015)J/ApJ/830/93 : Abundances of Ret II brightest red giant members (Ji+, 2016)J/ApJ/834/9 : Sp. obs. of LeoA, Aqr & Sgr dwarf gal. (Kirby+, 2017)J/ApJ/869/50 : Barium abundances of red giant branch stars (Duggan+, 2018)J/ApJS/237/18 : Cr, Co & Ni abund. for metal-poor red giants (Kirby+, 2018)J/ApJS/237/13 : Yields of 13-120M_{sun}_ massive stars (Limongi+, 2018)J/A+A/631/A80 : Mn lines NLTE formation in late-type stars (Bergemann+, 2019)J/A+A/631/A171 : Neutron-capture elements in dwarf gal. (Skuladottir+, 2019)J/A+A/626/A15 : Sculptor Red Giant Branch stars abundances (Hill+, 2019)J/ApJ/891/85 : Manganese abund. in GC & dSph galaxies (de los Reyes+, 2020)J/ApJ/913/53 : Gas content of galaxies within 2Mpc of the MW (Putman+, 2021)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/925/66https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/925/66http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/925/66https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/925/66https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/925/66http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/925/66GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/925/66/table1 (Abundance catalog of Sculptor dSph stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/925/66/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/925/66/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/925/66/table1?GETtext/xml+votable180.050000true14.8399167-33.71608330.0055555555555555566/35549 35720https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/925/66?format=asciiOpticaldefaultJ/ApJ/925/66/table1Abundance catalog of Sculptor dSph starsSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSurveySpectroscopic survey (1)meta.idcharIDID of star (from Kirby+ 2010, J/ApJS/191/352 or Hill+ 2019, J/A+A/626/A15)meta.id;meta.maincharRAJ2000[0/1] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[33] Degree of Declination (J2000)pos.eq.dec;meta.main[Fe/H][-3.9/-0.89] Iron logarithmic abundance relative to the Sunlog(Sun)phys.abund.Fefloate_[Fe/H][0.1/0.6] Uncertainty in [Fe/H]log(Sun)stat.error;phys.abund.Fefloat[Mg/Fe][-0.7/1.2]? Magnesium-to-iron logarithmic ratio relative to the Sunlog(Sun)phys.abundfloatnullablee_[Mg/Fe][0.1/1]? Uncertainty in [Mg/Fe]log(Sun)stat.error;phys.abundfloatnullable[Si/Fe][-0.6/1.4]? Silicon-to-iron logarithmic ratio relative to the Sunlog(Sun)phys.abundfloatnullablee_[Si/Fe][0.1/1]? Uncertainty in [Si/Fe]log(Sun)stat.error;phys.abundfloatnullable[Ca/Fe][-0.7/1.2]? Calcium-to-iron logarithmic ratio relative to the Sunlog(Sun)phys.abundfloatnullablee_[Ca/Fe][0.03/1]? Uncertainty in [Ca/Fe]log(Sun)stat.error;phys.abundfloatnullable[C/Fe][-1.1/0.7]? Carbon-to-iron logarithmic ratio relative to the Sunlog(Sun)phys.abundfloatnullablee_[C/Fe][0.3/0.5]? Uncertainty in [C/Fe]log(Sun)stat.error;phys.abundfloatnullable[Mn/Fe][-0.9/0.7]? Manganese-to-iron logarithmic ratio relative to the Sunlog(Sun)phys.abundfloatnullablee_[Mn/Fe][0.03/0.5]? Uncertainty in [Mn/Fe]log(Sun)stat.error;phys.abundfloatnullable[Ni/Fe][-1.4/0.6]? Nickel-to-iron logarithmic ratio relative to the Sunlog(Sun)phys.abundfloatnullablee_[Ni/Fe][0.09/0.4]? Uncertainty in [Ni/Fe]log(Sun)stat.error;phys.abundfloatnullable[Ba/Fe][-1.7/1.6]? Barium-to-iron logarithmic ratio relative to the Sunlog(Sun)phys.abundfloatnullablee_[Ba/Fe][0.16/0.5]? Uncertainty in [Ba/Fe]log(Sun)stat.error;phys.abundfloatnullable[Ba/Fe]s[-3.4/1.1]? S-process Barium-to-iron logarithmic ratio relative to the Sun (2)log(Sun)phys.abundfloatnullablee_[Ba/Fe]s[0.16/0.5]? Uncertainty in [Ba/Fe]slog(Sun)stat.error;phys.abundfloatnullable[Eu/Fe][-0.22/0.9]? Europium-to-iron logarithmic ratio relative to the Sunlog(Sun)phys.abundfloatnullablee_[Eu/Fe][0.19/0.4]? Uncertainty in [Eu/Fe]log(Sun)stat.error;phys.abundfloatnullableK15Display data from Kirby+ 2015, J/ApJ/801/125 within 1.5"meta.ref.urlintnullableK18Display data from Kirby+ 2018, J/ApJS/237/18 within 1.5"meta.ref.urlintnullableD20Display data from de los Reyes+ 2020, J/ApJ/891/85 within 1.5"meta.ref.urlintnullableD18Display data from Duggan+ 2018, J/ApJ/869/50 within 1.5"meta.ref.urlintnullable