标题： GHz峰谱星系中的N_H - N_HI 相关性 显示英文标题

标题： N_H - N_HI correlation in Gigahertz-peaked-spectrum galaxies

摘要： 使用WSRT（Westerbork综合射电望远镜），我们对一组已知的具有GHz峰值光谱（GPS）且呈紧致对称结构（CSO）的X射线发射星系进行了HI观测，这些星系之前未检测到HI吸收。 我们将整个X射线发射GPS/CSO样本的射电和X射线数据结合起来，发现总氢柱密度与中性氢柱密度之间存在显著的正相关关系（分别对应于$N_{\rm H}$和$N_{\rm HI}$）。 通过贝叶斯方法，我们同时量化了$N_{\rm H} - N_{\rm HI}$关系的参数以及数据集的固有离散程度。 对于样本中的特定子集，我们发现了$N_{\rm H} \propto N_{\rm HI}^b$，伴随着$b=0.93^{+0.49}_{-0.33}$和$\sigma_{int} (N_{\rm H})= 1.27^{+1.30}_{-0.40}$。 $N_{\rm H} - N_{\rm HI}$的相关性表明射电和X射线吸收气体的物理属性之间存在联系。 显示英文摘要

摘要： With the Westerbork Synthesis Radio Telescope, we performed HI observations of a sample of known X-ray emitting Gigahertz-peaked-spectrum galaxies with compact-symmetric-object morphology (GPS/CSOs) that lacked an HI absorption detection. We combined radio and X-ray data of the full sample of X-ray emitting GPS/CSOs and found a significant, positive correlation between the column densities of the total and neutral hydrogen ($N_{\rm H}$ and $N_{\rm HI}$, respectively). Using a Bayesian approach, we simultaneously quantified the parameters of the $N_{\rm H} - N_{\rm HI}$ relation and the intrinsic spread of the data set. For a specific subset of our sample, we found $N_{\rm H} \propto N_{\rm HI}^b$, with $b=0.93^{+0.49}_{-0.33}$, and $\sigma_{int} (N_{\rm H})= 1.27^{+1.30}_{-0.40}$. The $N_{\rm H} - N_{\rm HI}$ correlation suggests a connection between the physical properties of the radio and X-ray absorbing gas.