Volume 443, Number 3, December I 2005
|Page(s)||1007 - 1011|
|Section||Stellar structure and evolution|
|Published online||15 November 2005|
Metallicity effect in multi-dimensional SNIa nucleosynthesis
Istituto Nazionale di Astrofisica (INAF) - Osservatorio Astronomico di Torino, via Osservatorio 20, 10025 Pino Torinese (Torino), Italy e-mail: email@example.com
2 Max-Planck Institut für Astrophysik, Karl-Schwarzschild Strasse 1, 85741 Garching bei München, Germany
Accepted: 18 July 2005
We investigate the metallicity effect (measured by the original 22Ne content) on the detailed nucleosynthetic yields for 3D hydrodynamical simulations of the thermonuclear burning phase in type Ia supernovae (SNe Ia). Calculations are based on post-processes of the ejecta, using passively advected tracer particles. The nuclear reaction network employed in computing the explosive nucleosynthesis contains 383 nuclear species, ranging from neutrons, proton, and α-particles to 98Mo. we use the high resolution multi-point ignition (bubbles) model b30_3d_768, and we cover a metallicity range between and . We find a linear dependence of the ejected 56Ni mass on the progenitor's metallicity, with a variation in the 56Ni mass of ~25% in the metallicity range explored. The largest variation in 56Ni occurs at metallicity greater than solar. Almost no variations are shown in the unburned material 12C and 16O. The largest metallicity effect is seen in the α-elements. Implications for the observed scatter in the peak luminosities of SNe Ia are also discussed.
Key words: hydrodynamics / nuclear reactions, nucleosynthesis, abundances / supernovae: general
© ESO, 2005
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