Journal of High Energy Astrophysics ( IF 3.8 ) Pub Date : 2019-12-30 , DOI: 10.1016/j.jheap.2019.12.001 C. Güngör , M.Y. Ge , S. Zhang , A. Santangelo , S.N. Zhang , F.J. Lu , Y. Zhang , Y.P. Chen , L. Tao , Y.J. Yang , Q.C. Bu , C. Cai , X.L. Cao , Z. Chang , G. Chen , L. Chen , T.X. Chen , Y. 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 , Y.D. Gu , J. Guan , C.C. Guo , D.W. Han , Y. Huang , J. Huo , L. Ji , S.M. Jia , L.H. Jiang , W.C. Jiang , J. Jin , L.D. Kong , B. Li , C.K. Li , G. Li , M.S. Li , T.P. Li , W. Li , X. Li , X.B. Li , X.F. Li , Y.G. Li , Z.W. Li , X.H. Liang , J.Y. Liao , C.Z. Liu , G.Q. Liu , H.W. Liu , X.J. Liu , Y.N. Liu , B. Lu , X.F. Lu , T. Luo , Q. Luo , X. Ma , B. Meng , Y. Nang , J.Y. Nie , G. Ou , N. Sai , L.M. Song , X.Y. Song , L. Sun , Y. Tan , Y.L. Tuo , C. Wang , G.F. Wang , J. Wang , W.S. Wang , Y.S. Wang , X.Y. Wen , B.B. Wu , B.Y. Wu , M. Wu , G.C. Xiao , S. Xiao , S.L. Xiong , Y.P. Xu , J.W. Yang , S. Yang , Y.J. Yang , Q.B. Yi , Q.Q. Yin , Y. You , A.M. Zhang , C.M. Zhang , F. Zhang , H.M. Zhang , J. Zhang , T. Zhang , W. Zhang , W.C. Zhang , W.Z. Zhang , Y. Zhang , Y.F. Zhang , Y.J. 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
We study the 2018 outburst of Aql X-1 via the monitor of all sky X-ray image (MAXI) data. We show that the outburst starting in February 2018 is a member of short-low class in the frame of outburst duration and the peak count rate although the outburst morphology is slightly different from the other fast-rise-exponential-decay (FRED) type outbursts with a milder rising stage. We study the partial accretion in the weak propeller stage of Aql X-1 via the MAXI data of the 2018 outburst. We report on the spectral analysis of 3 observations of Aquila X-1 obtained by Insight – hard X-ray modulation telescope (Insight-HXMT) during the late decay stage of the 2018 outburst. We discuss that the data taken by Insight-HXMT is just after the transition to the weak propeller stage. Our analysis shows the necessity of a comptonization component to take into account the existence of an electron cloud resulting photons partly up-scattered.
中文翻译：
在螺旋桨早期阶段通过Insight-HXMT快照诊断天鹰座X-1的光谱特性
我们通过监控所有天空X射线图像（MAXI）数据来研究2018年Aql X-1爆发。我们显示，从2018年2月开始的爆发是短期低点的成员在爆发持续时间和峰值计数率的框架中分类，但爆发形态与其他具有较温和上升阶段的快速上升指数衰减（FRED）爆发略有不同。我们通过2018年爆发的MAXI数据研究了Aql X-1弱螺旋桨阶段的部分增生。我们报告了由Insight –硬X射线调制望远镜（Insight-HXMT）在2018年爆发的后期衰减阶段获得的Aquila X-1的3个观测值的光谱分析。我们讨论，Insight-HXMT所获取的数据只是在过渡到弱螺旋桨阶段之后。我们的分析表明，必须考虑质子化成分，才能考虑到存在一部分被向上散射的光子的电子云的存在。
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