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湍流应力对AGB星物质损失率作用的初步探讨 被引量：3

Discussion on Relationship between Turbulent stress and Mass Loss Rates of AGB Star
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摘要 通过分析8M⊙和2.8M⊙早期AGB星外部湍流应力与引力的比值在几个演化点上随质量的分布,发现在恒星外部存在一个湍流应力与引力的比值能达到几十的区域,该区域的位置随演化时间的变化而变化,此位置以外的壳层质量随时间的变化规律与Nieuwenhuijzen H.et.Al给出的恒星质量损失率的变化规律完全相同.在此基础上拟合出早期AGB星的质量损失率与出现最大湍流应力位置以外的壳层质量之间的关系式,提出湍流作用对星风的主要影响应体现在湍流作用大的区域在恒星外壳中的位置. According to Analyzing the distribution of the ratio of the turbulent stress to gravitation of pro--AGB with 2.8Mo and 8Mo on several evolution point, an area which the turbulent stress is several times as big as gravitation outward star is found. The position of this area is changed with the evolution time, and the Variety of mass outward this position is the same as the mass loss rates that is result of calculation with formulae of Nieuwenhuijzen. H. et. Al giving. We educe the formulae between the mass outward the position of appearing the maximal turbulent stress and the mass loss rates of pro--AGB, and present the primary Contribution of Turbulent Effect on stellar wind is the position of the area of existing larger turbulent stress.
作者 汪志云 陈培杰
机构地区 襄樊学院物理与电子信息技术系
出处 《广西民族大学学报（自然科学版）》 CAS 2007年第2期79-82,共4页 Journal of Guangxi Minzu University ：Natural Science Edition
关键词 AGB星 湍流 星风损失率 stellar structure and evolution AGB star turbulent
分类号 P142.4 [天文地球—天体物理]
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参考文献13

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二级参考文献25

  • 1汪志云,蒋苏云,陈培杰.8M_■恒星演化过程中湍流应力作用效果的分析[J].天文学报,2005,46(4):398-405. 被引量：6
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  • 10蒋苏云,黄润乾.湍流压对中小质量恒星后期演化的影响(I)湍流压、物态方程及热力学量的计算[J].天体物理学报,1997,17(3):271-282. 被引量：9

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广西民族大学学报（自然科学版）
2007年 第2期

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