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The heavy-element abundances of AGB stars and the angular momentum conservation model of wind accretion for barium stars | Y. C. Liang
; G. Zhao
; B. Zhang
; | Date: |
6 Nov 2000 | Subject: | astro-ph | Affiliation: | 1,3), G. Zhao (1,3), B. Zhang (2,4) ( Beijing Astro. Obs., Hebei Normal Univ. National Astro. Obs. BAC | Abstract: | Adpoting new s-process nucleosynthesis scenario and branch s-process path, we calculate the heavy-element abundances and C/O ratio of solar metallicity 3M_sun TP-AGB stars. The evolutionary sequence from M to S to C stars of AGB stars is explained naturally by the calculated results. Then combining the angular momentum conservation model of wind accretion with the heavy-element abundances on the surface of TP-AGB stars, we calculate the heavy-element overabundances of barium stars via successive pulsed accreting and mixing. Our results support that the barium stars with longer orbital period, P>1600 days, form through wind accretion scenario. | Source: | arXiv, astro-ph/0011118 | Services: | Forum | Review | PDF | Favorites |
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