物质吸积的外赋AGB星参数化模型  

Mass Accretion Parametric Model of Extrinsic AGB Stars

作　　者：张妙静[1] 张栩宁[1] 潘江洪[1] 丘秀强[1] 

机构地区：[1]广西师范大学物理与电子工程学院,广西桂林541004

出　　处：《广西师范大学学报（自然科学版）》2009年第1期17-20,共4页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金资助项目(10347002)

摘　　要：以单星的参数化慢中子俘获过程核合成模型为基础,提出了包含物质吸积的外赋AGB星参数化模型:在双星系统中,采用稳定的洛希瓣物质转移率,通过逐次脉冲将主星外包层的物质转移给伴星,伴星表面的物质经多次混合而最终形成外赋AGB星。此外,利用此模型较好地拟合了HD 201626和HD 196944的表面元素丰度。On the basis of the parametric method of single AGB star with s-process nucleosynthesis,a mass accretion parametric model is presented for the extrinsic AGB stars：In a binary system,the host, with a mass transfer rate for stable RLOF,transfers the material in successive pulses to the companion, and the latter will be a extrinsic AGB by receiving and mixing these material in its surface. And it gets a good fit to the observed abundances of HD201626 and HD196944.

关 键 词：外赋AGB 双星 S-过程 物质吸积 

分 类 号：P142[天文地球—天体物理]