AGB yields and Galactic Chemical Evolution: last updated

6th Nuclear Physics in Astrophysics

物理学;天文学

Bisterzo, S.^1,2 ; Travaglio, C.^2 ; Wiescher, M.^3 ; Gallino, R.^1 ; Köppeler, F.^4 ; Straniero, O.^5 ; Cristallo, S.^5 ; Imbriani, G.^6 ; Görres, J.^3 ; Deboer, R.J.^3

Department of Physics, University of Turin, Italy^1

INAF, Astrophysical Observatory of Turin, Italy^2

Department of Physics, University of Notre Dame, Notre Dame

IN, United States^3

Karlsruhe Institute of Technology, Karlsruhe, Germany^4

Osservatorio Astronomico di Collurania, Teramo, Italy^5

Dipartimento di Scienze Fisiche, Università di Napoli Federico II, Italy^6

关键词: AGB stars;    Extended range;    Galactic chemical evolutions;    Initial mass;    Metallicities;    Neutron capture cross section;    S-process;    Solar system formation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/665/1/012023/pdf
DOI  :  10.1088/1742-6596/665/1/012023

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

We study the s-process abundances at the epoch of the Solar-system formation as the outcome of nucleosynthesis occurring in AGB stars of various masses and metallicities. The calculations have been performed with the Galactic chemical evolution (GCE) model presented by [1, 2]. With respect to previous works, we used updated solar meteoritic abundances, a neutron capture cross section network that includes the most recent measurements, and we implemented the s-process yields with an extended range of AGB initial masses. The new set of AGB yields includes a new evaluation of the22Ne(α, n)25Mg rate, which takes into account the most recent experimental information.