Be/X射线双星RX J0209 .6-7427与AstroSat最近爆发的研究：麦哲伦桥中一颗新的超亮X射线脉冲星？
Study of Recent outburst in the Be/X-ray binary RX J0209.6-7427 with AstroSat: A new ultraluminous X-ray pulsar in the Magellanic Bridge?
摘要：
我们使用AstroSat卫星上的软X射线望远镜（SXT）和大面积X射线正比计数器（LAXPC）仪器进行观测，在其罕见的2019年爆发期间对RX J0209.6-7427进行了时间和光谱研究。NICER飞行任务首次在0.2-10千电子伏能量带探测到周期为9.29秒的脉动，如本文所述，AstroSat在0.3-80千电子伏的宽能量带探测到周期为9.29秒的脉动。脉冲星在爆发期间表现出快速自旋。能量分辨折叠脉冲轮廓产生在几个能量带在3-80 keV。据我们所知，这是第一次报告的时间和光谱特性，这是二元脉冲星的硬X射线。存在脉冲轮廓随能量的演变的建议。通过对脉冲星能谱的最佳拟合，推测RX J 0209.6 -7427的X射线光度为${1.6}\times 10^{39}$ ergs $^{-1}$。我们的时间和光谱的研究表明，这个源的特点，一个超明亮的X射线脉冲星在麦哲伦桥。详细的结果，并在目前的想法进行了讨论。
英文摘要：
We present the timing and spectral studies of RX J0209.6-7427 during its rare 2019 outburst using observations with the Soft X-ray Telescope (SXT) and Large Area X-ray Proportional Counter (LAXPC) instruments on the AstroSat satellite. Pulsations having a periodicity of 9.29 s were detected for the first time by the NICER mission in the 0.2-10 keV energy band and, as reported here, by AstroSat over a broad energy band covering 0.3-80 keV. The pulsar exhibits a rapid spin-up during the outburst. Energy resolved folded pulse profiles are generated in several energy bands in 3-80 keV. To the best of our knowledge this is the first report of the timing and spectral characteristics of this Be binary pulsar in hard X-rays. There is suggestion of evolution of the pulse profile with energy. The energy spectrum of the pulsar is determined and from the best fit spectral values, the X-ray luminosity of RX J0209.6-7427 is inferred to be ${1.6}\times 10^{39}$ ergs s$^{-1}$. Our timing and spectral studies suggest that this source has features of an ultraluminous X-ray pulsar in the Magellanic Bridge. Details of the results are presented and discussed in terms of the current ideas.
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