X射线双星的高能辐射研究

项目名称： X射线双星的高能辐射研究

项目编号： No.11473027

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 天文学、地球科学

项目作者： 张澍

作者单位： 中国科学院高能物理研究所

项目金额： 92万元

中文摘要： 课题的主要研究对象是X射线双星吸积的三个基本要素：盘、冕和喷流，特别是将重点开展对于冕的性质研究。我们将采用中子星表面的I 型X射线暴这样的经典标准烛光作为探针来研究冕的性质，以及冕和盘、喷流的相互关系。采用这种新的方法开展研究，有望给出有关吸积盘、冕和喷流观测的新结果，并将有助于研究两类伽玛射线XRB这一前沿热点：该领域的一个关键问题就是有关两类伽玛射线XRB吸积形成盘冕和喷流需要的条件，因此，伽玛射线XRB的观测积累和辐射机制研究也相应成为本课题的另一个研究重点。从观测上来看，我国的HXMT将在2015年升空，它具备世界最大的硬X探测面积以及最新的一手观测数据，通过结合其他卫星例如Fermi的数据，观测数据可以覆盖从硬X射线波段到伽玛射线波段的较宽能段。本课题通过采用新研究思路和分析新观测数据展开研究，预期为XRB领域中诸如冕的性质和伽玛射线XRB辐射机制等基本问题的解决提供新线索。

中文关键词： X射线双星；高能辐射；X射线；伽玛射线；辐射机制

英文摘要： The project will be focused on the three basic elements of X-ray binary system(XRB): disk/corona/jet, with the emphasis on the research of the corona property. The research will be carried out with a novel method of taking type-I X-ray burst as a unique probe to study the corona, and its correlation with the disk and the jet. By taking this novel method, it hopefully will lead to new clues in understanding the disk corona and jet, and is helpful for solving problems on the two types gamma-ray XRB, which is a current frontier hot spot. One of the key issues is about understanding the conditions under which the gamma-ray XRB system can form a disk/corona/jet structure. Therefore, gamma-ray XRB will be another research target of this project accordingly. For the observations, in 2015 the first Chinese HXMT will be launched, which works at hard X-ray with the largest detection area and provides us the most state-of-the-art data. We plan to work on the HXMT data and as well the data from other missions like Fermi, aiming at carrying out this project in a rather broad wavelength. This project is expected to provide clues necessary for resolving the basic problems of XRB domain, like the corona property and gamma-ray XRB emission mechanism, via being carried out with both the new probe and the new data.

英文关键词： XRB;high energy emission;X-ray;gamma-ray;emission mechanism