白矮-主序双星的搜寻及研究进展

发布时间：2017-12-31 02:03

本文关键词：白矮-主序双星的搜寻及研究进展　出处：《天文学进展》2014年04期 　论文类型：期刊论文

【摘要】：白矮-主序双星是银河系中最常见的致密双星系统,它包含一颗白矮星主星和一颗小质量主序星伴星,由主序双星演化而来。大约1/4的白矮-主序双星经历过一个公共包层演化阶段,其轨道间距较小,周期很短,被称为后共包层双星;而另外3/4的白矮-主序双星则从未经历过公共包层演化,其轨道间距几乎与其最初的主序双星的相同,被称为宽距白矮-主序双星。在光学波段,一般从白矮-主序双星的光谱上能明显地看出其有两个成分。随着大型巡天项目如SDSS、LAMOST巡天的开展,近年来搜寻到的白矮-主序双星的数目越来越多。通过对搜寻到的白矮-主序双星进行大量的后续观测,己从中发现并确认了一大批后共包层双星。利用观测到的白矮-主序双星及后共包层双星样本,有助于我们进一步理解密近双星的演化过程,尤其是公共包层演化的物理机制等重要的天体物理热点议题。介绍了白矮-主序双星的形成和演化,回顾了大型巡天项目中自矮-主序双星的系统搜寻,以及基于这些白矮-主序双星样本获得的研究成果,最后对白矮-主序双星的搜寻研究做了展望。
[Abstract]:White dwarf-principal sequence binary is the most common dense binary system in the Milky way. It consists of a white dwarf star and a small mass principal sequence star companion. About 1/4 of the white dwarf and principal order binary stars have gone through a common cladding evolution stage, with small orbital spacing and short period, so they are called post-coclave binary stars. The other 3/4 white dwarf-principal-order binary stars have never experienced a common cladding evolution, and their orbital spacing is almost the same as that of their original principal-order binary stars, known as wide-spaced white dwarf-principal-order binary stars in the optical band. In general, two components can be seen from the spectra of white dwarf and principal order binary stars, along with the development of large-scale survey projects such as SDSS / LAMOST survey. In recent years, more and more white dwarf and principal order binary stars have been searched. A large number of follow-up observations have been made on the white dwarf principal order binary stars. A large number of post-coclave binary stars have been found and confirmed. Using the observed samples of white dwarf principal order binary and post coclave binary stars, we can further understand the evolution process of dense near binary stars. In this paper, the formation and evolution of white dwarf-principal order binary stars are introduced, and the system search of self-dwarf-principal-order binary stars in large-scale survey projects is reviewed. Based on the research results obtained from these white dwarf-principal order binary stars, the prospect of searching for white dwarf-principal order binary stars is given.
【作者单位】：中国科学院光学天文重点实验室国家天文台;中国科学院大学;
【基金】：973项目(2014CB845700) 国家自然科学基金(11390370,11103031,11233004)
【分类号】：P145.5
【正文快照】： 1引言大部分恒星都位于双星系统中⑴,双星研宄是天体物理学的基础领域之一。对双星中两成分的动力学交互进行测量可以算出更准确的恒星参数。尤其有意义的是对致密双星的研究。致密双星是包含一颗或两颗致密天体(白矮星、中子星或黑洞)的双星系统,是研宄引力波物理的理想天体

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