A&A 443, 1007-1011 (2005)
DOI: 10.1051/0004-6361:20052883

Metallicity effect in multi-dimensional SNIa nucleosynthesis

C. Travaglio^{1, 2}, W. Hillebrandt² and M. Reinecke<sup>2

1</sup>  Istituto Nazionale di Astrofisica (INAF) - Osservatorio Astronomico di Torino, via Osservatorio 20, 10025 Pino Torinese (Torino), Italy
    e-mail: travaglio@to.astro.it
²  Max-Planck Institut für Astrophysik, Karl-Schwarzschild Strasse 1, 85741 Garching bei München, Germany

(Received 15 February 2005 / Accepted 18 July 2005)

Abstract
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 -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 -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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