论文标题
ULX PULSAR SWIFT J0243.6+6124 NUSTAR观察 - 超级 - 埃德丁顿州反射排放的优势
ULX pulsar Swift J0243.6+6124 observations with NuSTAR -- dominance of reflected emission in the super-Eddington state
论文作者
论文摘要
我们根据源在2017年爆发期间的Nustar观察结果，报告了ULX PULSAR SWIFT J0243.6+6124的超级伊德丁顿州埃德丁顿州的明亮反射发射成分的发现。在脉冲星相中，反射发射的通量变化较弱，而直接发射的脉冲幅度明显更大。我们建议，在该系统中，中子恒星在井中被孔的内边缘形成的井中，埃德丁顿的内部边缘由脉冲星的磁场截断。井的纵横比为H/R \ SIM 1。截短的圆盘的内边缘通过积聚柱的发射不断照亮，从而产生了弱变量反射的发射。随着中子恒星的旋转，其发射横向视线扫描，从而引起脉动直接发射。从铁线的多普勒拓宽中，我们测量了积聚盘\ sim 50 r_g的截断半径。磁场的推断偶极子分量与以前有利于强大场的估计值一致。该系统的唯一性取决于其中等超级 - 埃德丁顿的积聚速率和中等磁场，从而使截短的几何厚积聚盘的内边缘从中子恒星以较大的固体角度可以看到。
We report the discovery of the bright reflected emission component in the super-Eddington state of the ULX pulsar Swift J0243.6+6124, based on the NuSTAR observations of the source during its 2017 outburst. The flux of the reflected emission is weakly variable over the pulsar phase while the direct emission shows significantly larger pulsation amplitude. We propose that in this system the neutron star finds itself in the centre of the well formed by the inner edge of the geometrically thick super-Eddington accretion disc truncated by the magnetic field of the pulsar. The aspect ratio of the well is H/R \sim 1. The inner edge of the truncated disc is continuously illuminated by the emission of the accretion column giving rise to the weakly variable reflected emission. As the neutron star rotates, its emission sweeps through the line of sight, giving rise to the pulsating direct emission. From Doppler broadening of the iron line, we measure the truncation radius of the accretion disc \sim 50 R_g. The inferred dipole component of the magnetic field is consistent with previous estimates favouring a not very strong field. The uniqueness of this system is determined by its moderately super-Eddington accretion rate and the moderate magnetic field so that the inner edge of the truncated geometrically thick accretion disc is seen from the neutron star at a large solid angle.
