MAXI J1820+070 非物理自转演化的物理起源
高能天体物理现象
2021-04-14 v3
摘要
我们报道了 Insight-HXMT 对 2018 年爆发期间新黑洞 X 射线双星 MAXI J1820+070 的观测。通过连续谱拟合方法进行的详细光谱分析显示，在其高软态期间推断自转发生演化。此外，硬度比、非热光度与反射分数也经历演化，且与推断自转发生转变的时期完全吻合。该自转的非物理演化归因于内吸积盘的演化，后者由热冕因凝结机制坍缩引起，或可能与类喷流冕的减速有关。对内吸积盘半径以及吸积盘光度与内吸积盘半径关系的研究表明，仅在特定时刻吸积盘内边缘到达最内稳定圆轨道，此时自转测量才可靠。我们从而将 MAXI J1820+070 的自转限制为 a*=0.2^{+0.2}_{-0.3}。这样一个拥有强喷流但自转缓慢的黑洞表明，其喷流活动主要由吸积盘而非黑洞自转驱动。
引用
@article{arxiv.2012.12067,
title = {Physical origin of the nonphysical spin evolution of MAXI J1820+070},
author = {J. Guan and L. Tao and J. L. Qu and S. N. Zhang and W. Zhang and S. Zhang and R. C. Ma and M. Y. Ge and L. M. Song and F. J. Lu and T. P. Li and Y. P. Xu and Y. Chen and X. L. Cao and C. Z. Liu and L. Zhang and Y. N. Wang and Y. P. Chen and Q. C. Bu and C. Cai and Z. Chang and L. Chen and T. X. Chen and Y. B. Chen and W. W. Cui and Y. Y. Du and G. H. Gao and H. Gao and Y. D. Gu and C. C. Guo and D. W. Han and Y. Huang and J. Huo and S. M. Jia and W. C. Jiang and J. Jin and L. D. Kong and B. Li and C. K. Li and G. Li and W. Li and X. Li and X. B. Li and X. F. Li and Z. W. Li and X. H. Liang and J. Y. Liao and B. S. Liu and H. W. Liu and H. X. Liu and X. J. Liu and X. F. Lu and Q. Luo and T. Luo and X. Ma and B. Meng and Y. Nang and J. Y. Nie and G. Ou and X. Q. Ren and N. Sai and X. Y. Song and L. Sun and Y. Tan and C. Wang and L. J. Wang and P. J. Wang and W. S. Wang and Y. S. Wang and X. Y. Wen and B. B. Wu and B. Y. Wu and M. Wu and G. C. Xiao and S. Xiao and S. L. Xiong and R. J. Yang and S. Yang and Y. J. Yang and Y. J. Yang and Q. B. Yi and Q. Q. Yin and Y. You and F. Zhang and H. M. Zhang and J. Zhang and P. Zhang and W. C. Zhang and Y. F. Zhang and Y. H. Zhang and H. S. Zhao and X. F. Zhao and S. J. Zheng and Y. G. Zheng and D. K. Zhou},
journal= {arXiv preprint arXiv:2012.12067},
year = {2021}
}
备注
14 pages, 13 figures, 5 tables, accepted for publication in MNRAS