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红矮星双星的质径关系难题
Alternative TitleThe Problem of Relationship Between Mass and Radius of the Red Dwarf Binaries
张斌1,2; 朱俐颖1
Source Publication天文学进展(Progress In Astronomy)
2016-02
Volume34Issue:1Pages:20-36
DOI10.3969/j.issn.1000-8349.2016.01.02
ClassificationP144.9
Contribution Rank第1完成单位
Indexed ByCSCD ; 核心
Keyword红矮星 食双星 质径关系 磁场 自转 金属丰度
Abstract

红矮星的质量一般小于0.8 M_⊙,有效温度介于2 500~5 000 K之间,包括晚K型和M型恒星,属于小质量晚型恒星。红矮星双星由于展现出许多独特的性质而备受天文界关注,最为突出的有三点:精确测量恒星半径和质量,强烈的活动性,以及由于存在质径关系难题而表现出与理论演化模型的不符。所谓红矮星质径关系难题,是指观测到的恒星半径要比理论计算的大,而有效温度却比理论计算的低,但是光度一致。对此难题的可能解释主要包括三个方面:恒星金属丰度,恒星的自转以及恒星的磁场活动。随着研究的深入,支持自转和磁场活动联合作用的证据逐渐增多,具体的细节还在研究中。

Other Abstract

Red dwarfs which are ubiquitous in our galaxy refer to, the mass is less than 0.8 solar mass, with a low the surface effective temperature distribution between 2500~5000 K and in their main sequence evolution stage. Generally speaking, red dwarf binaries are cool stars including M and late K type stars, which belong to a part of late low-mass eclipsing binaries. Due to many unique properties, red dwarf binaries are brought into sharp focus in astronomy in recent years. The most prominent properties are the accurate measurement of stellar radius and mass; strongly activity and the discrepancy between theory evolution model and observation because of mass-radius relation problem. The so- called mass-radius relation problem means that the observed stellar radius is bigger than the theoretical calculation and the effective temperature is lower than the theoretical calculation, but the luminosity is consistent. The stellar metallicity, stellar rotation and stellar magnetic activity are three possible main explanations to this problem. As the deepening of the research, the evidence of supporting the combined action of rotation and magnetic activity is gradually increasing, the understanding of the specific details still need more efforts in the future.

Funding Project国家自然科学基金[11133007] ; 国家自然科学基金[11325315] ; 国家自然科学基金[11573063]
Funding Organization国家自然科学基金[11133007, 11325315, 11573063]
Language中文
Subject Area天文学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
ISSN1000-8349
CSCD IDCSCD:5651076
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9814
Collection双星与变星研究组
Corresponding Author张斌
Affiliation1.中国科学院云南天文台,昆明,650011
2.中国科学院大学,北京 ,100049
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
张斌,朱俐颖. 红矮星双星的质径关系难题[J]. 天文学进展(Progress In Astronomy),2016,34(1):20-36.
APA 张斌,&朱俐颖.(2016).红矮星双星的质径关系难题.天文学进展(Progress In Astronomy),34(1),20-36.
MLA 张斌,et al."红矮星双星的质径关系难题".天文学进展(Progress In Astronomy) 34.1(2016):20-36.
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