HXMT时代伽玛射线暴中心引擎研究

The central engine of gamma-ray bursts (GRBs) is one of the central topics in GRBs’research. However, many basic problems, such as the progenitor and the late activities of central engine, need to be further studied. By means of data analysis, theoretical research and numerical simulations, we will study the GRB central engine and the remnant compact object from the collapse of massive stars or mergers of compact stars, which is one of the key scientific goals of HXMT project. The data analysis will be performed via combining the observations from HXMT, Swift and Fermi satellites. The detail works in this project are shown as follows: 1) the properties of the prior emission and precursor of GRBs, based on the observations of HXMT satellite; 2) the identification of the progenitor of GRBs; 3) the constraints on the mass of the final compact object for the merger of two compact stars; 4) the re-activity of central engine. Our study will help to uncover the mechanism of the central engine of GRBs.

伽玛射线暴（简称伽玛暴）的中心引擎是伽玛暴研究的重点和热点之一，前身星、中心引擎的晚期活动等诸多基本问题有待进一步研究。本项目基于HXMT、Swift和Fermi卫星及地面望远镜协同观测的数据，通过数据处理处理、理论分析及数值模拟等手段，研究伽玛暴中心引擎，以及大质量恒星的死亡和致密星并合过程中黑洞的形成等重要科学问题(该内容为HXMT的重要科学目标之一)。项目的研究内容包括：1）利用HXMT低能探测器的数据研究伽玛暴的暴前辐射和先驱辐射特点；2）伽玛暴前身星类别的辨别；3）限制双致密星并合后中心天体的质量；4）中心引擎再活动过程等。本项目的研究，将有助于对伽玛暴中心引擎深入理解。

本项目以伽玛暴中心引擎为研究内容，我们基于 HXMT、Swift 和Fermi 卫星及地面望远镜协同或后续的观测数据 围绕着GRB的中心引擎、GRB的暴周环境、GRB的能谱及GRB的能源机制等方面进行了研究， 本项目还围绕未来的X射线天文星座CATCH计划开展了预先研究。