标题： 来自受激星云的光谱揭示银河系中心附近的湍流 显示英文标题

标题： Spectra from the shocked nebulae revealing turbulence near the Galactic Centre

摘要： 从银河系中心附近的云层发出的光谱被研究，通过计算紫外-光学-红外线，使用由中红外观测拟合约束的物理参数和元素丰度。 特征线比率与活动星系中观测到的进行比较。 我们发现银河系中心附近电离气体的物理条件与星暴星系和活动星系核不同，即气体速度和密度以及光致电离通量相对较低。 发射星云的几何厚度特别小，这表明物质受到不稳定性强烈分割，导致底层冲击生成的湍流。 显示英文摘要

摘要： The spectra emitted from clouds near the Galactic Centre are investigated calculating the UV-optical-IR lines using the physical parameters and the element abundances constrained by the fit of mid-IR observations. The characteristic line ratios are compared with those observed in active galaxies. We have found that the physical conditions in the nebulae near the GC are different from those of starburst galaxies and AGN, namely, gas velocities and densities as well as the photoionization fluxes are relatively low. The geometrical thickness of the emitting nebulae is particularly small suggesting that matter is strongly fragmented by instabilities leading to an underlying shock-generated turbulence.