天文学进展2016，Vol.34Issue(1)：20-36,17.DOI:10.3969/j.issn.1000-8349.2016.01.02
红矮星双星的质径关系难题
The Problem of Relationship Between Mass and Radius of the Red Dwarf Binaries
摘要
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.关键词
红矮星/食双星/质径关系/磁场/自转/金属丰度Key words
red dwarf/eclipsing binary/M?R relation/magnetic field/rotation/metallicity分类
天文与地球科学引用本文复制引用
张斌,朱俐颖..红矮星双星的质径关系难题[J].天文学进展,2016,34(1):20-36,17.基金项目
国家自然科学基金(11133007,11325315,11573063) （11133007,11325315,11573063）
