矮新星概述与研究进展

发布时间：2018-03-06 18:20

本文选题：双星　切入点：激变变星　出处：《天文学进展》2014年04期 　论文类型：期刊论文

【摘要】：矮新星是爆发频繁的激变变星,主星是白矮星,次星是充满洛希瓣的晚型矮星;白矮星周围有吸积盘,物质流与吸积盘的碰撞区域即热斑。与大多数密近双星系统相比,矮新星最大的特点是吸积盘的存在以及频繁的爆发现象。首先介绍了矮新星的研究历史和现状,对吸积盘的形成过程进行总结,给出了矮新星的基本物理图像;其次简要介绍了矮新星的各种次型的特征和形成原因,对目前的爆发模型进行归纳;回顾了矮新星中著名的轨道周期空缺现象和最短轨道周期截止现象,并给出其在标准化模型下的解释以及标准化模型面临的挑战;举例说明了矮新星的轨道周期变化分析不仅对研究其演化起着重要作用,而且是探测褐矮星和地外行星的重要手段;对食光变曲线的分析方法和矮新星中罕见的高低态变化进行了简单小结;最后,进行总结并讨论矮新星领域的发展趋势和目前的一些热点问题。
[Abstract]:Dwarf nova is a frequent burst variable star, the main star is a white dwarf star, the second star is a late dwarf star full of Losch lobes, the white dwarf star has accretion disk around it, the collision area between mass flow and accretion disk is hot spot. Compared with most close binary star system, The greatest characteristic of dwarf nova is the existence of accretion disk and frequent explosion phenomenon. Firstly, the history and present situation of dwarf nova research are introduced, the forming process of accretion disk is summarized, and the basic physical image of dwarf nova is given. Secondly, the characteristics and causes of various subtypes of dwarf nova are briefly introduced, and the current burst models are summarized, and the famous phenomena of orbital cycle vacancy and shortest orbital period cut-off in dwarf nova are reviewed. The interpretation under the standardized model and the challenge faced by the standardized model are given, and an example is given to illustrate that the analysis of the orbital periodic variation of the dwarf nova not only plays an important role in the study of its evolution. It is also an important means to detect brown dwarfs and exoplanets, and a brief summary of the analysis method of the light variation curve and the rare high and low changes in dwarf nova is given. The development trend of dwarf nova and some current hot issues are summarized and discussed.
【作者单位】：中国科学院云南天文台;中国科学院大学;
【基金】：国家自然科学基金(11133007,11325315)
【分类号】：P145.3

【共引文献】