文章基本信息

标题：The Interaction Between Accretion from the Interstellar Medium and Accretion from the Evolved Binary Component in Barium Stars
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作者：Yeuncheol Jeong ; Alexander V. Yushchenko ; Dmytry N. Doikov 等
期刊名称：Journal of Astronomy and Space Sciences
印刷版ISSN：2093-5587
电子版ISSN：2093-1409
出版年度：2018
卷号：35
期号：1
页码：1-6
DOI：10.5140/JASS.2018.35.1.1
语种：English
出版社：Korean Space Science Society
摘要：The reanalysis of the previously published abundance pattern of mild barium star HD202109 (ζ Cyg) and the chemical compositions of 129 thin disk barium stars facilitated the search for possible correlations of different stellar parameters with second ionization potentials of chemical elements. Results show that three valuable correlations exist in the atmospheres of barium stars. The first is the relationship between relative abundances and second ionization potentials. The second is the age dependence of mean correlation coefficients of relative abundances vs. second ionization potentials, and the third one is the changes in correlation coefficients of relative abundances vs. second ionization potentials as a function of stellar spatial velocities and overabundances of s-process elements. These findings demonstrate the possibility of hydrogen and helium accretion from the interstellar medium on the atmospheres of barium stars.
关键词：abundances;atmospheres;evolution;binaries;individual: HD 202109;accretion;accretion disks;circumstellar matter