项目名称: X射线双星的多波段观测性质研究
项目编号: No.11303047
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 雷亚娟
作者单位: 中国科学院国家天文台
项目金额: 29万元
中文摘要: X射线双星是包含一个致密天体和一个伴星的双星系统,致密天体通过吸积伴星的物质辐射高能射线。本项目将利用当代高能天文卫星的数据库,结合射电、光学等波段的观测数据,对X射线双星做数据处理及统计分析研究,以揭示致密天体的吸积环境、吸积盘结构演化和辐射机制、喷流的来源及产生机制,以及这些现象的相互关系。研究的内容既包含某个样本的统计性质,也有个体的特征。研究方法主要是能谱和时变方法,例如不同能段的相关性和时延、准周期震荡等与吸积率的演化关系,能谱模型的变化和拟合参数演化。另外,目前认证的激变变星数目很有限,我们将利用LAMOST的巡天数据,结合其他波段数据进行交叉证认,发现一批新的激变变星。同时我们利用X射线巡天数据和光学巡天数据,对已认证的激变变星进行多波段研究。
中文关键词: X射线双星;X射线;吸积;吸积盘;
英文摘要: X-ray binary comprise a compact object orbiting a companion, which emit X-ray radiations due to the accretion of matter from the companion. With the data of high energy astronomical missions, referring to the data of radio and optics,the project aims at detecting the structure of accretion disk, emission mechanism, the origion of jet, and the relationship of these phenomena. Timing and spectral studies are main method,for example, the cross correlation function and time lag of different energy bands, QPO, spectral model and parameters, and their evolution along the accretion rate. The results of studies contain both the statistical characteristics and the features of certain system. At the same time, with optical and X-ray survey, some new Cataclysmic Variables will be detected and identified, whose multi-wavelength data will be analyzed.
英文关键词: X-ray binary;X-ray;accretion;accretion disk;