白矮主序双星光谱的参数自动测量研究

发布时间：2018-05-17 23:20

本文选题：白矮主序双星 + 参数测量　；参考：《光谱学与光谱分析》2017年09期

【摘要】：白矮主序双星是一类致密的双星系统,主星是一颗白矮星,伴星是一颗小质量的M型主序星。白矮主序双星光谱的数量相对较少,但对该类天体的研究对于进一步理解密近双星的演化,特别是公共包层演化的物理机制等重要的天体物理热点有积极的意义。SDSS-DR12是美国SLOAN巡天望远镜发布的最新数据,基于前期实验在其中发现的4,140个白矮主序双星光谱,通过最小二乘法对这些光谱进行分解后,使用模板匹配方法,测量了这批样本中两个子星的基本参数,包括有效温度、重力加速度、金属丰度等,并对结果进行了分析和统计,进一步丰富了白矮主序双星模板库。白矮主序双星的参数测量的主要问题是计算量大,在实验中使用了GPU技术,提高了匹配效率,在海量光谱处理方向进行了有益尝试。实验结果表明该方法对大型巡天望远镜的海量光谱参数自动处理有较重要的应用价值。
[Abstract]:White dwarf principal order binary star is a kind of dense binary system. The main star is a white dwarf star and the companion star is a small mass M-type principal ordered star. The number of spectra of white dwarf binary stars is relatively small, but the study of this kind of celestial bodies is useful for further understanding the evolution of dense binary stars. SDSS-DR12 is the latest data released by the SLOAN Survey Telescope in the United States, and it is based on the 4140 white dwarf principal sequence binary star spectra found in previous experiments. After these spectra were decomposed by the least square method, the basic parameters of the two sub-stars in the samples were measured by template matching method, including effective temperature, gravity acceleration, metal abundance and so on, and the results were analyzed and counted. Further enriched the white dwarf binary template library. The main problem in the parameter measurement of white dwarf binary star is the large amount of calculation. The GPU technique is used in the experiment to improve the matching efficiency and a useful attempt has been made in the processing direction of mass spectrum. The experimental results show that this method has important application value for the automatic processing of the massive spectral parameters of a large survey telescope.
【作者单位】：山东大学(威海)机电与信息工程学院;
【基金】：国家自然科学基金项目(11473019) 山东省自然科学基金项目(ZR2014AM015) 中国博士后科学基金项目(2015M582075)资助
【分类号】：P153

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