4U 1901+03耀发期间吸积结构之间的转换
高能天体物理现象
2020-03-11 v1
摘要
我们报告了利用Insight-HXMT和NICER对X射线吸积脉冲星4U 1901+03的2019年爆发进行分析的结果。在爆发的衰减阶段，能谱和脉冲轮廓均发生显著演化。整个爆发过程中观测到数十次耀发。它们在爆发峰值时更频繁且更亮。我们发现，持续时间为数十至数百秒的耀发通常比持久辐射亮约1.5倍。耀发期间的脉冲轮廓形状可能与持久辐射显著不同。特别是，在许多情况下清楚地观测到相位偏移。我们将这些发现解释为脉冲束流图案改变的直接证据，其源于亚临界与超临界吸积态之间的短时间尺度转换。我们还观察到，在可比光度下，耀发的脉冲轮廓与持久辐射的脉冲轮廓相当相似。这表明中子星极冠上的吸积主要由光度即质量吸积率决定。
引用
@article{arxiv.2002.08919,
title = {Switches between accretion structures during flares in 4U 1901+03},
author = {L. Ji and L. Ducci and A. Santangelo and S. Zhang and V. Suleimanov and S. Tsygankov and V. Doroshenko and A. Nabizadeh and S. N. Zhang and M. Y. Ge and L. Tao and Q. C. Bu and J. L. Qu and F. J. Lu and L. Chen and L. M. Song and T. P. Li and Y. P. Xu and X. L. Cao and Y. Chen and C. Z. Liu and C. Cai and Z. Chang and G. Chen and T. X. Chen and Y. B. Chen and Y. P. Chen and W. Cui and W. W. Cui and J. K. Deng and Y. W. Dong and Y. Y. Du and M. X. Fu and G. H. Gao and H. Gao and M. Gao and Y. D. Gu and J. Guan and C. C. Guo and D. W. Han and Y. Huang and J. Huo and S. M. Jia and L. H. Jiang and W. C. Jiang and J. Jin and L. D. Kong and B. Li and C. K. Li and G. Li and M. S. Li and W. Li and X. Li and X. B. Li and X. F. Li and Y. G. Li and Z. W. Li and X. H. Liang and J. Y. Liao and G. Q. Liu and H. X. Liu and H. W. Liu and X. J. Liu and Y. N. Liu and B. Lu 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 Y. L. Tuo and C. Wang and G. F. Wang and J. Wang and P. J. Wang and W. S. Wang and Y. S. Wang and X. Y. Wen and B. Y. Wu and B. B. Wu and M. Wu and G. C. Xiao and S. Xiao and S. L. Xiong and J. W. Yang and S. Yang and Yan-Ji Yang and Yi-Jung Yang and Q. B. Yi and Q. Q. Yin and Y. You and A. M. Zhang and C. M. Zhang and F. Zhang and H. M. Zhang and J. Zhang and P. Zhang and T. Zhang and W. Zhang and W. C. Zhang and W. Z. Zhang and Yi Zhang and Y. F. Zhang and Y. J. Zhang and Y. H. Zhang and Yue Zhang and Z. Zhang and Z. L. Zhang and H. S. Zhao and X. F. Zhao and S. J. Zheng and D. K. Zhou and J. F. Zhou and Y. X. Zhu and Y. Zhu},
journal= {arXiv preprint arXiv:2002.08919},
year = {2020}
}
备注
11 pages, 8 figures, accepted for publication in MNRAS