基于ASAS巡天数据研究大样本相接双星的物理参数

发布时间：2018-11-16 09:58

【摘要】：在银河系中,有一半以上的恒星都是双星系统。双星是由万有引力这个“纽带”连接在一起的,它们相互绕转,呈现出特有的演化图景。在双星系统中,有的双星经常发生激烈的恒星活动现象(如:恒星黑子活动、耀斑爆发等)叫做色球活动双星,这类活动的双星系统对于我们的研究有着重要的意义。相接双星物理参数的研究不仅是恒星物理领域的热点课题,也是国际天体物理界非常重视的研究方向,并且我们的课题组在国内已经成功地开展了这个领域的研究工作。在本论文中,首先,根据从ASAS巡天数据中下载的相接双星相关数据,利用国际上求解食双星物理参数最著名的工具(WD程序)对相接双星的物理参数进行计算,再利用Origin绘图软件进行绘图,最后根据得到的物理参数、光变曲线图和结构图,进行分析总结。其次,利用我们课题组在智利的60cm望远镜观测得到的相接双星2MASS J21223350-4627383和2MASS J21222458-4619391为例,使用IRAF软件对测光数据进行孔径测光,再通过WD程序调试得出这两颗相接双星的测光解,利用得到的理论曲线去拟合原始的光变曲线,根据拟合的结果看出求得的测光解是正确的,并画出了这两颗相接双星的结构图。最后,把ASAS测光巡天数据和LAMOST光谱巡天数据进行交叉研究,在LAMOST数据库中找到了214颗ASAS进行过测光研究的食双星,并在这些食双星的光谱中找出具有Hα线发射的,即是有恒星色球活动的双星光谱。通过整理出这些光谱,对于今后继续进行食双星的观测研究有着指导性的意义。
[Abstract]:More than half of the stars in the Milky way are binary systems. The binary stars are linked by the "tie" of gravity, which revolves around each other and presents a unique evolutionary picture. In binary systems, some binary stars often occur intense star activity (such as star sunspot activity, flare burst, etc.) called chromospheric activity binaries. This kind of active binary star system is of great significance to our research. The study of the physical parameters of binary stars is not only a hot topic in the field of star physics, but also a very important research direction in the international astrophysics field, and our research group has successfully carried out the research work in this field in China. In this thesis, first of all, based on the data of binary stars downloaded from ASAS survey data, the most famous tool (WD program) for solving the physical parameters of binary stars in the world is used to calculate the physical parameters of binary stars. At last, according to the physical parameters, optical curve diagram and structure diagram, it is analyzed and summarized by using Origin drawing software. Secondly, with the examples of 2MASS J21223350-4627383 and 2MASS J21222458-4619391, which were observed by our group's 60cm telescope in Chile, the aperture photometry of photometry data was performed by IRAF software. Then the photometric solutions of the two binary stars are obtained by debugging the WD program, and the theoretical curves obtained are used to fit the original light variation curves. According to the fitting results, it is shown that the obtained photometric solutions are correct. The structure of the two binary stars is drawn. Finally, the ASAS photometric survey data and the LAMOST spectral sky survey data are cross-studied, and 214 binary stars which have been studied by ASAS have been found in the LAMOST database, and the H 伪 line emission has been found in the spectra of these binary stars. This is the spectrum of binary stars with stellar chromospheric activity. By sorting out these spectra, it is of guiding significance to continue the observation and study of binary stars in the future.
【学位授予单位】：贵州大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：P144.9

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