YNAO OpenIR  > 恒星物理研究组
NUMERICAL INTEGRAL OF RESISTANCE COEFFICIENTS IN DIFFUSION
Zhang QS(张钱生)1,2,3; Zhang, Q. S.(Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Peoples R China)
发表期刊ASTROPHYSICAL JOURNAL
2017-01-10
卷号834期号:2页码:132-
DOI10.3847/1538-4357/834/2/132
产权排序第1完成单位
收录类别SCI
关键词Diffusion Stars: Abundances Stars: Interiors
摘要The resistance coefficients in the screened Coulomb potential of stellar plasma are evaluated to high accuracy. I have analyzed the possible singularities in the integral of scattering angle. There are possible singularities in the case of an attractive potential. This may result in a problem for the numerical integral. In order to avoid the problem, I have used a proper scheme, e.g., splitting into many subintervals where the width of each subinterval is determined by the variation of the integrand, to calculate the scattering angle. The collision integrals are calculated by using Romberg's method, therefore the accuracy is high (i.e., similar to 10(-12)). The results of collision integrals and their derivatives for -7 <= psi <= 5 are listed. By using Hermite polynomial interpolation from those data, the collision integrals can be obtained with an accuracy of 10(-10). For very weakly coupled plasma (psi >= 4.5), analytical fittings for collision integrals are available with an accuracy of 10(-11). I have compared the final results of resistance coefficients with other works and found that, for a repulsive potential, the results are basically the same as others'; for an attractive potential, the results in cases of intermediate and strong coupling show significant differences. The resulting resistance coefficients are tested in the solar model. Comparing with the widely used models of Cox et al. and Thoul et al., the resistance coefficients in the screened Coulomb potential lead to a slightly weaker effect in the solar model, which is contrary to the expectation of attempts to solve the solar abundance problem.
项目资助者National Natural Science Foundation of China(11303087) ; Chinese Academy of Sciences (Light of West China Program) ; Chinese Academy of Sciences (Youth Innovation Promotion Association)
语种英语
学科领域天文学
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2017-01-18
WOS记录号WOS:000400138300006
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]THERMONUCLEAR REACTION-RATES ; SOLAR CONVECTION ZONE ; OF-STATE TABLES ; ELEMENT DIFFUSION ; COMPOSITION GRADIENTS ; REVISED ABUNDANCES ; STELLAR PLASMAS ; MODELS ; HELIUM ; OPACITIES
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/10177
专题恒星物理研究组
中国科学院天体结构与演化重点实验室
通讯作者Zhang, Q. S.(Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Peoples R China)
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, P. R. China
2.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, P. R. China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming, 650216, P. R. China
推荐引用方式
GB/T 7714
Zhang QS,Zhang, Q. S.. NUMERICAL INTEGRAL OF RESISTANCE COEFFICIENTS IN DIFFUSION[J]. ASTROPHYSICAL JOURNAL,2017,834(2):132-.
APA Zhang QS,&Zhang, Q. S..(2017).NUMERICAL INTEGRAL OF RESISTANCE COEFFICIENTS IN DIFFUSION.ASTROPHYSICAL JOURNAL,834(2),132-.
MLA Zhang QS,et al."NUMERICAL INTEGRAL OF RESISTANCE COEFFICIENTS IN DIFFUSION".ASTROPHYSICAL JOURNAL 834.2(2017):132-.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
NUMERICAL INTEGRAL O(701KB)期刊论文出版稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Zhang QS(张钱生)]的文章
[Zhang, Q. S.(Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Peoples R China)]的文章
百度学术
百度学术中相似的文章
[Zhang QS(张钱生)]的文章
[Zhang, Q. S.(Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Peoples R China)]的文章
必应学术
必应学术中相似的文章
[Zhang QS(张钱生)]的文章
[Zhang, Q. S.(Chinese Acad Sci, Yunnan Observ, 396 Yangfangwang, Kunming 650216, Peoples R China)]的文章
相关权益政策
暂无数据
收藏/分享
文件名: NUMERICAL INTEGRAL OF RESISTANCE COEFFICIENTS IN DIFFUSION.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。