慧眼-HXMT观测到的黑洞双星系统中的W-K关系
The W-K Relation in Black Hole X-ray Binaries from Insight-HXMT Observation
马宾远 1杨孜旭 1廖进元 2屈进禄1
作者信息
- 1. 中国科学院大学天文与空间科学学院 北京 100049;中国科学院高能物理研究所 北京 100049
- 2. 中国科学院高能物理研究所 北京 100049
- 折叠
摘要
通过几十年的观测研究,黑洞X射线双星(X-Ray Binary,XRB)部分特征被揭示.然而,吸积盘结构尚不确定.黑洞XRB功率密度谱的截断频率与准周期振荡(Quasi Periodic Oscillation,QPO)的相关性质(W-K关系)可以限制吸积盘结构.利用慧眼-HXMT(Hard X-ray Modulation Telescope)观测到的5个黑洞XRB的数据,对黑洞XRB的W-K关系进行了研究,结果表明在慧眼-HXMT观测的3个探测器能段中W-K关系成立.此外在MAXI J1535-571之中存在截断频率和吸积盘内半径的相关关系,这和截断的吸积盘结构一致.如果观测到的功率密度谱来自质量吸积率的扰动传播,可以推测吸积盘内半径接近最内圆形稳定轨道,此黑洞可能是高自旋系统.
Abstract
Through decades of observations and studies,the characteristics of black hole X-ray binaries(XRBs)have been gradually revealed.However,the structure of the accretion disk remains uncertain.In the power density spectrum of the BHXRB(Black Hole X-ray Binaries),there is a correlation between the break frequency and the quasi-periodic oscillation(W-K relation),and it can constrain the current model of accretion disk.The W-K relation in black hole XRBs is studied based on the observations of five black hole XRBs by Insight-HXMT(Hard X-ray Modulation Telescope).The result shows that the W-K relation is valid in all the three telescopes with different energy bands.Moreover,a correlation between the break frequency and the inner radius of the accretion disk is found for MAXI J1535-571,which is self-consistent with the model of a truncated accretion disk.If the observed power density spectra result from the propagation of perturbation in mass accretion rate,it can be further inferred that the inner radius of the accretion disk is close to the innermost stable circular orbit and the black hole might be a high-spin system.
关键词
X射线:双星/相对论过程/吸积盘/辐射机制:普通Key words
X-ray:binary/relativistic processes/accretion disk/radiation mechanisms:general引用本文复制引用
基金项目
国家重点研发计划(2021YFA0718500)
出版年
2024
NETL
NSTL
万方数据