论文标题
NGC 4151中X射线排放线气体的质量流出
Mass Outflow of the X-ray Emission Line Gas in NGC 4151
论文作者
论文摘要
我们已经分析了Seyfert Galaxy NGC 4151中X射线发射管线气体的Chandra/高能传输光栅光谱。零阶光谱谱图显示了延长的H-和HE样O和NE，最多可远距离$ r \ r \ r \ sim $ r \ sim $ sim $ 200。使用一阶光谱，我们测量平均线速度$ \ sim -230 $ km s $^{ - 1} $，这表明X射线气体的流出很大。我们生成了多云的光电子化模型，以适合一阶光谱。我们需要三个发射线组件，具有列密度，log $ n_ {h} $和电离参数，log $ u $，分别为22.5/1.0、22.5/0.19和23.0/-0.50。为了估计电离气体的总质量和质量流出速率，我们应用了模型参数以适合Ne〜ix和Ne〜x的零阶发射线轮廓。我们确定了$ \ 5.4 \ times $ 10 $^{5} $ m_sun的总质量。假设具有与[O〜III]气体相同的运动配置文件，峰值X射线质量流出率为$ \ of \ r \ sim 150 $ pc。总质量和质量流出率与使用[O〜III]确定的质量流出率相似，这意味着X射线气体是主要的流出组件。但是，与光学流出不同，X射线流出速率不会以$ r> 100美元的价格下降，这表明它可能会对主机星系产生更大的影响。
We have analysed Chandra/High Energy Transmission Gratings spectra of the X-ray emission line gas in the Seyfert galaxy NGC 4151. The zeroth order spectral images show extended H- and He-like O and Ne, up to a distance $r \sim$ 200 pc from the nucleus. Using the 1st order spectra, we measure an average line velocity $\sim -230$ km s$^{-1}$, suggesting significant outflow of X-ray gas. We generated Cloudy photoionisation models to fit the 1st order spectra. We required three emission-line components, with column density, log$N_{H}$, and ionisation parameter, log$U$, of 22.5/1.0, 22.5/0.19, and 23.0/-0.50, respectively. To estimate the total mass of ionised gas and the mass outflow rates, we applied the model parameters to fit the zeroth order emission-line profiles of Ne~IX and Ne~X. We determined the total mass of $\approx 5.4 \times$ 10$^{5}$ M_sun. Assuming the same kinematic profile as that for the [O~III] gas, the peak X-ray mass outflow rate was $\approx 1.8$ M_sun yr$^{-1}$, at $r \sim 150$ pc. The total mass and mass outflow rates are similar to those determined using [O~III], implying that the X-ray gas is a major outflow component. However, unlike the optical outflows, the X-ray outflow rate does not drop off at $r >$ 100 pc, which suggests that it may have a greater impact on the host galaxy.
