Volume 447, Number 2, February IV 2006
|Page(s)||641 - 647|
|Section||Stellar structure and evolution|
|Published online||07 February 2006|
The s-process weak component: uncertainties due to convective overshooting
Istituto Nazionale di Astrofisica – Osservatorio Astrofisico di Catania (INAF-OAC), Città Universitaria, via S. Sofia 78, 95123 Catania, Italy e-mail: email@example.com
2 Università di Catania, Dipartimento di Fisica e Astronomia (sez. astrofisica), Città Universitaria, via S. Sofia 78, 95123 Catania, Italy
Accepted: 29 September 2005
Using a new s-nucleosynthesis code, coupled with the stellar evolution code Star2003, we performed simulations to study the impact of the convection treatment on the s-process during core He-burning in a star (ZAMS mass) with an initial metallicity of . Particular attention was devoted to the impact of the extent of overshooting on the s-process efficiency. The results show enhancements of about a factor in s-process efficiency (measured as the average overproduction factor of the 6 s-only nuclear species with ) with overshooting parameter values in the range , compared to results obtained with the same model but without overshooting. The impact of these results on the p-process model based on type II supernovae is discussed.
Key words: nuclear reactions, nucleosynthesis, abundances / convection / stars: evolution / stars: interiors
© ESO, 2006
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