Journal of High Energy Astrophysics ( IF 3.8 ) Pub Date : 2019-10-09 , DOI: 10.1016/j.jheap.2019.09.001 Y.P. Chen , S. Zhang , S.N. Zhang , L. Ji , L.D. Kong , A. Santangelo , J.L. Qu , F.J. Lu , T.P. Li , L.M. Song , Y.P. Xu , X.L. Cao , Y. Chen , C.Z. Liu , Q.C. Bu , C. Cai , Z. Chang , G. Chen , L. Chen , T.X. Chen , Y.B. Chen , W. Cui , W.W. Cui , J.K. Deng , Y.W. Dong , Y.Y. Du , M.X. Fu , G.H. Gao , H. Gao , M. Gao , M.Y. Ge , Y.D. Gu , J. Guan , C.C. Guo , D.W. Han , Y. Huang , J. Huo , S.M. Jia , L.H. Jiang , W.C. Jiang , J. Jin , B. Li , C.K. Li , G. Li , M.S. Li , W. Li , X. Li , X.B. Li , X.F. Li , Y.G. Li , Z.W. Li , X.H. Liang , J.Y. Liao , G.Q. Liu , H.W. Liu , X.J. Liu , Y.N. Liu , B. Lu , X.F. Lu , Q. Luo , T. Luo , X. Ma , B. Meng , Y. Nang , J.Y. Nie , G. Ou , X.Q. Ren , N. Sai , L. Sun , Y. Tan , L. Tao , Y.L. Tuo , C. Wang , G.F. Wang , 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 , J.W. Yang , S. Yang , Y.J. Yang , Y.J. Yang , Q.B. Yi , Q.Q. Yin , Y. You , A.M. Zhang , C.L. Zhang , C.M. Zhang , F. Zhang , H.M. Zhang , J. Zhang , T. Zhang , W.C. Zhang , W. Zhang , W.Z. Zhang , Yi. Zhang , Y.F. Zhang , Y.J. Zhang , Y. Zhang , Z. Zhang , Z.L. Zhang , H.S. Zhao , X.F. Zhao , S.J. Zheng , D.K. Zhou , J.F. Zhou , Y. Zhu , Y.X. Zhu
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.
中文翻译：
在4U 1608–52上的Insight-HXMT观察：明亮的I型X射线猝发的演化光谱特性
先前已通过频谱和时序分析检测到了热核（I型）X射线爆发对中子星低质量X射线双星（LMXB）中周围环境的影响的证据。得益于Insight-HXMT的广泛能量覆盖范围，我们分析了一个光球半径扩展（PRE）突发，并在软X射线下发现了过量的发射。我们的频谱分析表明，这种过量可能与突发发射引起的磁盘反射无关，而可以归因于爆发前/持续发射的增强。我们发现，突发和增强的持久性排放总和超过爱丁顿光度约40％。我们推测增强的发射来自超过PRE半径的区域，或通过电晕的Comptonization。
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