Insight-HXMT observation on 4U 1608–52: Evolving spectral properties of a bright type-I X-ray burst

Autor:	S. N. Zhang, W. C. Jiang, W. S. Wang, Ge Ou, Z. Chang, J. F. Zhou, X.Q. Ren, C. Z. Liu, C. L. Zhang, Tian-Xiang Chen, Min Gao, H. S. Zhao, Sisi Yang, G. F. Wang, D. K. Zhou, Yi Zhang, X. J. Liu, J. L. Qu, G. C. Xiao, Jia Huo, Z. L. Zhang, Y. G. Li, M. X. Fu, Ya Fang Huang, Bing Li, F. Zhang, Chun-sheng Zhang, X. F. Li, Aimei Zhang, W. Z. Zhang, J. Z. Wang, Liang Sun, Y. B. Chen, Xue-Feng Lu, F. J. Lu, S. M. Jia, XiangYang Wen, Lian Tao, Yuan You, Junke Zhang, Gang Li, Y. S. Wang, Wei Zhang, B. Y. Wu, Qi-Bin Yi, B. B. Wu, Mao-Shun Li, Yunchao Liu, Y. J. Yang, Tao Luo, Xiaobo Li, L. D. Kong, S. Xiao, Yi-Qiao Dong, X. L. Cao, W. C. Zhang, Q. Luo, Weiguang Cui, X. X. Li, Yuan-Yuan Du, J. Y. Liao, H. M. Zhang, Gang Chen, Qingcui Bu, B. Lu, Y. H. Tan, J. K. Deng, Cheng-Cheng Guo, H. W. Liu, N. Sai, Q. Q. Yin, Y. P. Chen, Y. F. Zhang, C. K. Li, L. M. Song, Yu-Dong Gu, J. Jin, G. H. Gao, Xin-Fu Zhao, S. J. Zheng, Y. X. Zhu, C. Cai, Z. W. Li, Zhi-Xiang Zhang, X. H. Ma, Ming-Yu Ge, M. Wu, Y. Zhang, C. Wang, Wenxiong Li, Andrea Santangelo, Yu-Xuan Zhu, Shaolin Xiong, Luhua Jiang, Y. P. Xu, Y. J. Zhang, H. Gao, X. H. Liang, J. Guan, Ti-Pei Li, Y. L. Tuo, J. W. Yang, GuoQing Liu, Wei Cui, Long Ji, T. Zhang, L. Chen, J. Y. Nie, Da-Wei Han, Bin Meng, Y. Nang
Rok vydání:	2019
Předmět:	Physics Thermonuclear fusion 010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena Spectral properties X-ray Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Radius Astrophysics 01 natural sciences symbols.namesake Neutron star Space and Planetary Science 0103 physical sciences Eddington luminosity Reflection (physics) symbols Spectral analysis 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics
Zdroj:	Journal of High Energy Astrophysics. 24:23-29
ISSN:	2214-4048
Popis:	The evidences for the influence of thermonuclear (type-I) X-ray bursts upon the surrounding environments in neutron star low-mass X-ray binaries (LMXB) were detected previously via spectral and timing analyses. Benefitting from a broad energy coverage of Insight-HXMT, we analyze one photospheric radius expansion (PRE) burst, and find an emission excess at soft X-rays. Our spectral analysis shows that, such an excess is not likely relevant to the disk reflection induced by the burst emission and can be attributed to an enhanced pre-burst/persistent emission. We find that the burst and enhanced persistent emissions sum up to exceed Eddington luminosity by ∼ 40 percentages. We speculate that the enhanced emission is from a region beyond the PRE radius, or through the Comptonization of the corona.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2a5ef6abe52f33bc3a7fa0a228804646 https://doi.org/10.1016/j.jheap.2019.09.001 Zobrazit plný text záznamu Full Text from ScienceDirect