论文标题
4U 1636-536中的爆炸盘相互作用如良好所观察到的
Burst-Disk Interaction in 4U 1636-536 as observed by NICER
论文作者
论文摘要
我们介绍了在三年监测活动过程中Neutron Star Interior Composition Explorer（NICE）从4U 1636-536观察到的51个热核X射线爆发。我们对其中的40个爆发进行了时间分辨光谱，并显示了所有爆发光谱中存在强软过量的。过量的发射可以通过使用缩放系数（F_A方法）来持续发射来表征，这归因于由于Poynting-Robertson拖动而导致中子星的质量积聚率的提高。软过量发射也可以通过使用模型来考虑积聚磁盘的突发发射的反射。我们还提出了对5 X射线爆发的时间分析的光谱分析。最后，我们通过与\ nustar同时观察到的7个X射线爆发的证据，通过在爆发开始的4U 1636-536的硬X射线灯泡中的相关减小。
We present the detection of 51 thermonuclear X-ray bursts observed from 4U 1636-536 by the Neutron Star Interior Composition Explorer (NICER) over the course of a three year monitoring campaign. We performed time resolved spectroscopy for 40 of these bursts and showed the existence of a strong soft excess in all the burst spectra. The excess emission can be characterized by the use of a scaling factor (f_a method) to the persistent emission of the source, which is attributed to the increased mass accretion rate on to the neutron star due to Poynting-Robertson drag. The soft excess emission can also be characterized by the use of a model taking into account the reflection of the burst emission off of the accretion disk. We also present time resolved spectral analysis of 5 X-ray bursts simultaneously observed by NICER and AstroSat, which confirm the main results with even greater precision. Finally, we present evidence for Compton cooling using 7 X-ray bursts observed contemporaneously with \nustar, by means of a correlated decrease in the hard X-ray lightcurve of 4U 1636-536 as the bursts start.
