会议专题

A Spectroscopic Study of Barium Stars

We present an analysis of eight barium stars,providing their atmospheric parameters (Teff,log g,Fe/H,ξt)and chemical abundances,based on the high signal-to-noise ratio and high resolution Echelle spectra.The s-process elements Y,Zr,Ba,La,Eu show obvious overabundance relative to the Sun.And Na,Mg,Al,si,Ca,Sc,Ti,V,Cr,Mn,Ni show comparable abundances to the Solar ones.The results of theoretical model of wind accretion for binary systems can explain the observed abundance patterns of the neutron capture process elemeats in these Ba stars,which means that their overabundant heavy—elements could be caused by accreting the ejecta of AGB stars,the progenitors of the present white dwarf companions in the binary systems.

Stars:abundances Stars:atmospheres Stars:chemically peculiar Stars:evolution binaries:spectroscopic

G.Q.Liu Y.C.Liang L.Deng

National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,P.R.China;Graduate Un National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100012,P.R.China

国际会议

The 252th Symposium of the International Astronomical Union(国际天文学联合会第252届研讨会)

海南三亚

英文

425-426

2008-04-06(万方平台首次上网日期,不代表论文的发表时间)