模拟在NGC 1068倾斜流出周围飞行时的光学/UV偏振
Modeling the optical/UV polarization while flying around the tilted outflows of NGC 1068
摘要：
最近的多波段光谱和脉泽观测的建模表明，在原型的Seyfert-2星系NGC 1068的核区域的电离流出相对于遮蔽环面的垂直轴倾斜。在此基础上，我们建立了NGC 1068光学/紫外波段的复杂后处理模型。我们应用辐射转移程序STOKES计算偏振光谱和图像。电子和尘埃散射和辐射耦合发生在多组分物体的内部区域的影响被考虑在内，并在不同的极角和方位角的视角进行评估。再现了观测到的活动星系核的1型/2型极化二分法。在假设观察者朝向NGC 1068的倾斜度下，极化由极外流中的散射主导，因此它指示了它们相对于环轴的倾斜角。虽然我们的模型结果的详细分析仍在进行中，我们简要地讨论它们如何与现有的NGC 1068偏振观测。
英文摘要：
Recent modeling of multi-waveband spectroscopic and maser observations suggests that the ionized outflows in the nuclear region of the archetypal Seyfert-2 galaxy NGC 1068 are inclined with respect to the vertical axis of the obscuring torus. Based on this suggestion, we build a complex reprocessing model of NGC 1068 for the optical/UV band. We apply the radiative transfer code STOKES to compute polarization spectra and images. The effects of electron and dust scattering and the radiative coupling occurring in the inner regions of the multi-component object are taken into account and evaluated at different polar and azimuthal viewing angles. The observed type-1/type-2 polarization dichotomy of active galactic nuclei is reproduced. At the assumed observer's inclination toward NGC 1068, the polarization is dominated by scattering in the polar outflows and therefore it indicates their tilting angle with respect to the torus axis. While a detailed analysis of our model results is still in progress, we briefly discuss how they relate to existing polarization observations of NGC 1068.
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