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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >A Study of Three-Dimensional Kinematics of the Narrow-Line Region of the Seyfert Galaxy NGC 4151 Based on Integral Field Spectroscopy
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A Study of Three-Dimensional Kinematics of the Narrow-Line Region of the Seyfert Galaxy NGC 4151 Based on Integral Field Spectroscopy

机译：基于积分光谱法的赛弗特星系NGC 4151窄线区域的三维运动学研究

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摘要

By using the Integral Field Spectroscopy mode of the Kyoto Tri-dimensional Spectrograph II we have mapped the two-dimensional distribution of kinematics in a wide variety of emission lines in the narrow-line region of NGC 4151. We decomposed the emission lines and defined two components: a narrow component and a broad component. The narrow component has smaller FWHM values, and is spatially more extended than the broad component. We applied a simple model to each component, a rotation in the galactic plane for the narrow component and a biconical outflow model for the broad one. The two-dimensional velocity distributions of the narrow component was well-fitted to a normal rotation in the galactic plane, with the best-fit parameters being similar among the emission lines. We found that the residual maps show similar large positive values at a knot around 6" southwest form the nucleus. For the central region, excluding the knot, the velocity field was fitted better, and the residual was small as the relative wavelength-calibration accuracy of the instrument among lenslets. We modeled the broad component with a simple biconical outflow axisymmetrical with respect to its axis by assuming a constant outflowing velocity, a constant FWHM value, and the emission line strength declining according to a power law with the distance from the nucleus. The best-fit model suggests that PA for the axis of the biconical outflow is close to the direction of the [OIII] line emission elongation. Our line of sight was included within the outflowing bicone, which had filled cones.
机译：通过使用京都三维三维光谱仪II的积分场光谱模式，我们绘制了NGC 4151窄线区域中各种发射线中运动学的二维分布。我们分解了发射线并定义了两个组成部分：一个狭窄的组成部分和一个广泛的组成部分。较窄的组件具有较小的FWHM值，并且在空间上比较宽的组件更具扩展性。我们对每个组件应用了一个简单模型，较窄的组件在银河平面上旋转，而较宽的组件则采用了双圆锥流出模型。窄分量的二维速度分布非常适合银河系平面中的法向旋转，在发射线之间最佳拟合参数相似。我们发现，残差图在原子核西南约6“处的结处显示出相似的大正值。对于中心区域，除结以外，速度场拟合得更好，并且残差较小，因为相对波长校准精度我们通过假设恒定的流出速度，恒定的FWHM值以及发射线强度根据幂定律随距其中心的距离而下降而对相对于其轴呈轴对称的简单双圆锥形流出进行建模。最佳拟合模型表明，双锥形流出的轴的PA接近[OIII]线发射伸长的方向，我们的视线包含在流出的锥形孔中，锥形孔已填充。

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