论文标题
MKN 478的反射分数与X射线通量和光谱指数的相关变异性
Correlated variability of the reflection fraction with the X-ray flux and spectral index for Mkn 478
论文作者
论文摘要
已知MKN 478的X射线频谱由强软过量过量主导，可以使用相对论模糊反射来描述。利用{\ it xmm-newton}的观察，{\ it astrosat}和{\ it迅速}，我们表明，长期（$ \ sim $年）和中间（天数到几个月）的可变性，反射分数是抗变量和频谱的可变性，而造成了越来越多的X。 洞。使用{\ it xmm-newton}数据的通量分辨光谱，我们表明反射分数在短时间的时间尺度上具有相同的磁通和索引。结果表明，源的长期和短期变化都取决于相同的物理机制，具有强力弯曲的强力机制，从而导致反射增强，而随着电晕的移动靠近黑洞，则可以增强反射和低通量。
The X-ray spectrum of Mkn 478 is known to be dominated by a strong soft excess which can be described using relativistic blurred reflection. Using observations from {\it XMM-Newton}, {\it AstroSat} and {\it Swift}, we show that for the long-term ($\sim$ years) and intermediate-term (days to months) variability, the reflection fraction is anti-correlated with the flux and spectral index, which implies that the variability is due to the hard X-ray producing corona moving closer to and further from the black hole. Using flux-resolved spectroscopy of the {\it XMM-Newton} data, we show that the reflection fraction has the same behaviour with flux and index on short time-scales of hours. The results indicate that both the long-term and short-term variability of the source is determined by the same physical mechanism of strong gravitational light bending causing enhanced reflection and low flux as the corona moves closer to the black hole.
