arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2012.02556astro-ph.HE
收藏

用Insight-HXMT观测吸积脉冲星GX 301-2的X射线后处理

X-ray reprocessing in accreting pulsar GX 301-2 observed with Insight-HXMT

L. Ji, V. Doroshenko, V. Suleimanov, A. Santangelo, M. Orlandini, J. Liu, L. Ducci, S. N. Zhang, A. Nabizadeh, D. Gavran, S. Zhang, M. Y. Ge, X. B. Li, L. Tao, … 展开作者

L. Ji, V. Doroshenko, V. Suleimanov, A. Santangelo, M. Orlandini, J. Liu, L. Ducci, S. N. Zhang, A. Nabizadeh, D. Gavran, S. Zhang, M. Y. Ge, X. B. Li, L. Tao, Q. C. Bu, J. L. Qu, F. J. Lu, L. Chen, L. M. Song, T. P. Li, Y. P. Xu, X. L. Cao, Y. Chen, C. Z. Liu, C. Cai, Z. Chang, T. X. Chen, Y. P. Chen, W. W. Cui, Y. Y. Du, G. H. Gao, H. Gao, Y. D. Gu, J. Guan, C. C. Guo, D. W. Han, Y. Huang, J. Huo, S. M. Jia, W. C. Jiang, J. Jin, L. D. Kong, B. Li, C. K. Li, G. Li, W. Li, X. Li, X. F. Li, Z. W. Li, X. H. Liang, J. Y. Liao, B. S. Liu, H. X. Liu, H. W. Liu, X. J. Liu, X. F. Lu, Q. Luo, T. Luo, R. C. Ma, X. Ma, B. Meng, Y. Nang, J. Y. Nie, G. Ou, X. Q. Ren, N. Sai, X. Y. Song, L. Sun, Y. Tan, Y. L. Tuo, C. Wang, L. J. Wang, P. J. Wang, W. S. Wang, Y. S. Wang, X. Y. Wen, B. Y. Wu, B. B. Wu, M. Wu, G. C. Xiao, S. Xiao, S. L. Xiong, R. J. Yang, S. Yang, Yan-Ji Yang, Yi-Jung Yang, Q. B. Yi, Q. Q. Yin, Y. You, F. Zhang, H. M. Zhang, J. Zhang, P. Zhang, W. Zhang, W. C. Zhang, Yi Zhang, Y. F. Zhang, Y. H. Zhang, H. S. Zhao, X. F. Zhao, S. J. Zheng, Y. G. Zheng, D. K. Zhou

摘要:

我们研究了2017-2019年Insight-HXMT/LE探测到的GX 301-2观测的吸收和发射特征。在不同的轨道相位,我们发现了突出的Fe K α,K β和Ni K α线,以及康普顿肩和Fe K壳层吸收边。这些特征是由于来自源的辐射与周围的吸积材料之间的相互作用引起的X射线再处理。根据铁谱线K α和K β的比值,我们推断吸积物质处于低电离态。我们发现了一个与轨道相关的局部吸收柱密度,它在近星点附近具有很大的值和很强的变化性。我们解释其可变性的吸积环境的不均匀性和/或吸积过程的不稳定性的结果。此外,可变的局部柱密度与整个轨道上的铁K α线的等效宽度相关,这表明中子星附近的吸积物质是球形分布的。

英文摘要:

We investigate the absorption and emission features in observations of GX 301-2 detected with Insight-HXMT/LE in 2017-2019. At different orbital phases, we found prominent Fe Kalpha, Kbeta and Ni Kalpha lines, as well as Compton shoulders and Fe K-shell absorption edges. These features are due to the X-ray reprocessing caused by the interaction between the radiation from the source and surrounding accretion material. According to the ratio of iron lines Kalpha and Kbeta, we infer the accretion material is in a low ionisation state. We find an orbital-dependent local absorption column density, which has a large value and strong variability around the periastron. We explain its variability as a result of inhomogeneities of the accretion environment and/or instabilities of accretion processes. In addition, the variable local column density is correlated with the equivalent width of the iron Kalpha lines throughout the orbit, which suggests that the accretion material near the neutron star is spherically distributed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑