X射线双星多波段辐射的起源和特性

X-ray binary is a celestial system that shows some high-energy activity phenomena, containing of a stellar companion, a compact star (black hole or neutron star), an accretion disk and jet components. There are complex interactions between these components, thus the research on this type of celestial systems is currently an important field in astrophysics. Through theoretical considerations,numerical calculation and simulation,analysis of multi-band observation data from high resolution astronomical instruments, the project studies high-energy physical processes in this class of objects. The concrete contents include: the particle acceleration mechanism of the interaction regions that correspond to the accretion disk, compact star magnetosphere and jets, and the radiation characteristics of the resulting photon and neutrino spectra; the dissipated magnetic energies and characteristics of light curve in the formation process of an episodic jet; dynamical structures of mutual couplings between outflows (collimated jets + non-collimated winds) and hot accretion flows, and the resulting multi-band photon spectrum. This research project is dedicated to understand coupling dynamical structures between outflows and an accretion disk, explain the multiband radiation origin, flare characteristics, especially spectral feature with the variation of the orbital solution. The implementation of this project will help us recognize the physical processes for interactions of various physical components. Furthermore, the resulting results will have the certain enlightenment function, when we use these knowledge to investigate other related astrophysical problems.

X射线双星是呈现出高能活动现象的天体系统，由恒星伴星、致密星（黑洞或中子星）、吸积盘及喷流组成。这些组成部分之间有着复杂的相互作用，对这类天体系统的研究是当今天体物理学的一个重要前沿领域。本项目计划通过理论模型构建、数值计算模拟和对高分辨率天文仪器的多波段观测数据的分析，研究这类天体系统中的高能物理过程。具体内容包括吸积盘、致密星磁层、喷流区域的粒子加速机制及伴随产生的光子和中微子的辐射特性，间断性喷流中磁能的耗散及光变特性，外流（准直的喷流＋非准直的风）与热吸积流相互耦合的动力学结构及多波段光子谱特性。本项目致力于理解外流与吸积盘耦合的动力学结构，解释多波段辐射起源、辐射闪耀等特性，特别是随轨道变化的相解谱特征。本项目将有助于认识多种物理成分相互作用的物理过程，并对运用这些知识研究其它相关的天体物理问题有一定的启示作用。

X射线双星是呈现出高能活动现象的天体系统，由恒星伴星、致密星（黑洞或中子星）、吸积盘及喷流组成。这些组成成分之间有着复杂的相互作用，对这类天体系统的研究是当今天体物理学的一个重要前沿领域。本项目已经通过理论模型构建、数值计算模拟和对高分辨率天文仪器的多波段观测数据的分析，研究了这类天体系统中的高能物理过程。通过本项目的研究，我们(1)完成了X射线双星喷流中多波段辐射起源及能谱分布特性的研究，限定了多波段辐射区域及潜在的辐射机制；(2)完成了物质能量耗散及高能粒子加速、传播、辐射的研究课题，建立了自洽的高能辐射模型；(3)完成了吸积流区域高能粒子的电磁级联辐射模型；(4)完成了X射线双星Cygnus X-1伽玛射线段偏振能谱分布特性理论研究工作；(5)在本项目的资助下，新增了新的研究内容，即通过与美国的Alex Lazarian教授及韩国的Jungyeon Cho教授等在磁流体力学（MHD）湍流方面开展了数值模拟的研究工作。