论文标题
NGC 4151中的相对论反射
Relativistic reflection in NGC 4151
论文作者
论文摘要
我们使用同时使用Suzaku和XMM观测值补充的Suzaku/Nustar观测和磁通分辨的积分光谱研究了Seyfert Galaxy NGC 4151的X射线光谱。我们的最佳光谱溶液表明，在数百个重力半径的距离上，在薄薄物质中产生了狭窄的Fe Kalpha线。在这样的模型中，我们发现当源处于明亮的X射线状态时，从大约十个重力半径截断的磁盘中存在弱但显着的相对论反射。我们找不到在昏暗X射线状态下或反对相对论反射的证据。我们还排除了X射线发射的模型，该模型由位于黑洞地平线的源占主导地位，该源是在以前的作品中提出的，该作品实现了该源的灯柱几何形状。我们指出的是，在灯柱几何形状到NUSTAR数据的应用中，对热组合频谱的准确计算及其对强力的失真至关重要。
We investigate the X-ray spectrum of the Seyfert galaxy NGC 4151 using the simultaneous Suzaku/NuSTAR observation and flux-resolved INTEGRAL spectra supplemented by Suzaku and XMM observations. Our best spectral solution indicates that the narrow Fe Kalpha line is produced in Compton-thin matter at the distance of several hundred gravitational radii. In such a model, we find a weak but significant relativistic reflection from a disk truncated at about ten gravitational radii when the source is in bright X-ray states. We do not find evidence either for or against the presence of relativistic reflection in the dim X-ray state. We also rule out models with X-ray emission dominated by a source located very close to the black hole horizon, which was proposed in previous works implementing the lamp-post geometry for this source. We point out that accurate computation of the thermal Comptonization spectrum and its distortion by strong gravity is crucial in applications of the lamp-post geometry to the NuSTAR data.
