利用 Insight-HXMT 观测的吸积脉冲星 GX 301-2 中的 X 射线再处理
高能天体物理现象
2020-12-16 v1
摘要
我们研究了 2017–2019 年 Insight-HXMT/LE 探测到的 GX 301-2 观测中的吸收与发射特征。在不同轨道相位，我们发现了显著的 Fe Kalpha、Kbeta 与 Ni Kalpha 线，以及康普顿肩和 Fe K 壳层吸收边。这些特征源于来自源的辐射与周围吸积物质相互作用引起的 X 射线再处理。根据铁线 Kalpha 与 Kbeta 的比值，我们推断吸积物质处于低电离态。我们发现依赖于轨道的局部吸收柱密度，其在近星点处具有大数值和强变异性。我们将这种变异性解释为吸积环境的不均匀性和/或吸积过程的不稳定性所致。此外，可变局部柱密度与整个轨道中铁 Kalpha 线的等效宽度相关，这表明中子星附近的吸积物质呈球状分布。
引用
@article{arxiv.2012.02556,
title = {X-ray reprocessing in accreting pulsar GX 301-2 observed with Insight-HXMT},
author = {L. Ji and V. Doroshenko and V. Suleimanov and A. Santangelo and M. Orlandini and J. Liu and L. Ducci and S. N. Zhang and A. Nabizadeh and D. Gavran and S. Zhang and M. Y. Ge and X. B. Li 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 T. X. Chen and Y. P. Chen and W. W. Cui and Y. Y. Du and G. H. Gao and H. 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 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. F. Li and Z. W. Li and X. H. Liang and J. Y. Liao and B. S. Liu and H. X. Liu and H. W. Liu and X. J. Liu and X. F. Lu and Q. Luo and T. Luo and R. C. Ma 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 L. 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 R. J. Yang and S. Yang and Yan-Ji Yang and Yi-Jung 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. Zhang and W. C. Zhang and Yi 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:2012.02556},
year = {2020}
}
备注
10 pages, 5 figures, 2 tables, accepted for publication in MNRAS