The Influence of Turbulent Stress to Structure and Evolution of AGB Star;

Based on the present s-Process nucleosynthesis models for AGB stars, with~(13)C pocket releasing neutrons radiatively in interpulse period, using the simplified assumption that the~(13)C pocket is subdivided into three layers, the asymptotic distribution of neutron exposures in the He intershell is investigated.

Based on the model of stellar structure and evolution concerning turbulent stress,the evolutions of the early AGB star with initial mass 7M⊙ are computed by means of different mixing parameter.

Characteristics of the Distribution of Neutron Exposures in Low-mass AGB Stars

In present study,the relations between ration of the heavy to lingh s-element(slow neutrue capture element)abundances,heavy s-element abundances,lingh selement abundances and the average neutron exposure are calculated for the extrinsic AGB stars,respectively.

According to the latest model of TP-AGB stars,we put forward a kind of parametric method which calculates element abundances in the envelope of AGB stars.

The influence on the spin vector distributions by the intrinsic flatness of disk galaxies is taken into account.

Combining the scenario of TP-AGB stars radiative s-process nucleosynthesis and the change equations of the Binary stars wind accretion model orbital elements,using the method of pulse mass accretion and mixture one time after anther,we calculate the evolution process of large numbers of Low-mass Binary stars and count the distributed rules of extrinsic AGB stars evolved into Lead-stars.