J/ApJ/774/75ivo://CDS.VizieR/J/ApJ/774/75doi:10.26093/cds/vizier.17740075CDSWest C.Heger A.2015-04-24T10:54:03Z2015-03-26T16:05:55ZCDS support team

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

cds-question@unistra.frastronomical-modelschemical-abundancessupernovaeAll stellar evolution models for nucleosynthesis require an initial isotopic abundance set to use as a starting point. Generally, our knowledge of isotopic abundances of stars is fairly incomplete except for the Sun. We present a first model for a complete average isotopic decomposition as a function of metallicity. Our model is based on the underlying nuclear astrophysics processes, and is fitted to observational data, rather than traditional forward galactic chemical evolution modeling which integrates stellar yields beginning from big bang nucleosynthesis. We first decompose the isotopic solar abundance pattern into contributions from astrophysical sources. Each contribution is then assumed to scale as a function of metallicity. The resulting total isotopic abundances are summed into elemental abundances and fitted to available halo and disk stellar data to constrain the model's free parameter values. This procedure allows us to use available elemental observational data to reconstruct and constrain both the much needed complete isotopic evolution that is not accessible to current observations, and the underlying astrophysical processes. As an example, our model finds a best fit for Type Ia contributing =~0.7 to the solar Fe abundance, and Type Ia onset occurring at [Fe/H]=~-1.1, in agreement with typical values.2013ApJ...774...75Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/774/75CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/566/A146 : Pair-instability supernovae models (Kozyreva+, 2014)J/ApJ/769/99 : Nucleosynthetic yields for stars >12M{sun} (Brown+, 2013)J/ApJS/199/38 : Presupernova evolution (Limongi+, 2012)J/MNRAS/404/1529 : s-process in low-metallicity stars (Bisterzo+, 2010)J/MNRAS/403/1413 : Updated stellar yields from AGB models (Karakas, 2010)J/ApJ/724/341 : Nucleosynthesis of massive metal-free stars (Heger+, 2010)J/ApJ/696/797 : Evolution & yields of low-mass AGB stars (Cristallo+, 2009)J/A+A/490/769 : Yields from extremely metal-poor stars (Campbell+, 2008)J/A+A/438/139 : Abundances in Milky Way's disk (Soubiran+, 2005)http://www.kadonis.org/ : Karlsruhe Astrophysical Database of Nucleosynthesishttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/774/75https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/774/75http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/774/75https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/774/75https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/774/75http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/774/75GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/774/75/table2Solar abundance decompositionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintElElement namemeta.id;phys.atmol.elementcharA[1/238] Isotope numberphys.atmol.weightintSolar[0/1] Solar abundance (1)phys.abunddoubles-main[0/1]? Main s-process abundance yield (2)phys.abunddoublenullables-weak[0/1]? Weak s-process abundance yield (2)phys.abunddoublenullabler[0/1]? r-process abundance yield (2)phys.abunddoublenullablenu-p[0/1]? {nu}p-process abundance yield (2)phys.abunddoublenullablegamma[0/1]? {gamma}-process abundance yield (2)phys.abunddoublenullableIa[0/1]? Type Ia SNe abundance yield (2)phys.abunddoublenullableMassive[0/1]? Massive star abundance yield (2)phys.abunddoublenullableGCR[0/0.3]? Secondary Galactic Cosmic Ray spallation abundance yield (2)phys.abunddoublenullablenu-N-GCR[0.5/0.8]? {nu}-process, novae, and secondary cosmic ray spallation abundance yield (2)phys.abunddoublenullableBBN[0.19/1.6]? Big Bang Nucleosynthesis abundance yield (2)phys.abunddoublenullable