论文标题
阐明NGC 1194中重新处理气体的全球分布
Elucidating the global distribution of reprocessing gas in NGC 1194
论文作者
论文摘要
对明亮的，局部的Seyfert 1.9 Galaxy，NGC 1194进行了XMM-NEWTON和NUSTAR联合观察。该AGN的硬光谱形式是使用Toroidal Copercesor mytorus建模的。解耦模型形式很好地描述了频谱，反射是由全球平均柱密度> 4 x 10^24 cm^-2的气体产生的，并通过降低级别的较低柱传输连续体。在此模型中，反射强度比简单圆环的预期高〜3。这样的结果可能表明，许多固有的X射线连续体都隐藏在视图中。另一种模型是斑点的圆环，其中85％的视线被Compton-Thick-Thick-thick Gas遮盖了，其余的15％由Compton-phin-lin-lin-com suble。斑点的圆环模型基于Fe的太阳丰度，与其他AGN中发现的X射线部分覆盖结果一致。斑点的圆环模型可以以反射特征的强度来缓解问题，这不是直观的结果：关于全局后处理气体几何形状的这种见解无法使用临时模型组件来描述光谱形式。
A joint XMM-Newton and NuSTAR observation was conducted for the bright, local Seyfert 1.9 galaxy, NGC 1194. The hard spectral form of this AGN was modeled using the toroidal reprocessor MYTORUS. The decoupled model form provides a good description of the spectrum, with reflection arising from gas with a global average column density > 4 x 10^24 cm^-2 and transmission of the continuum through an order-of-magnitude lower column. In this model, the reflection strength is a factor ~3 higher than expected from a simple torus. Such a result may indicate that much of the intrinsic X-ray continuum is hidden from view. An alternative model is that of a patchy torus, where 85% of sight-lines are obscured by Compton-thick gas and the remaining 15% by Compton-thin gas. The patchy torus model is based on a solar abundance of Fe and is consistent with X-ray partial-covering results found in other AGN. That a patchy torus model would relieve the issue with the strength of the reflection signature is not an intuitive result: such an insight regarding the geometry of the global reprocessing gas could not have been obtained using ad hoc model components to describe the spectral form.
