论文标题
湍流对银河核气环的影响
The effects of turbulence on galactic nuclear gas rings
论文作者
论文摘要
内部几千座式星系中的气体动力学通常会导致产生核气环的构型。但是，银河核环形成的一般动力学描述并未考虑到热压和湍流的影响。在这里，我们在银河系中对气体进行了3D流体动力模拟，该模拟的可能性限于$ 2 $ 〜kpc的半径。我们包括自我实力和大规模的湍流驱动模块。我们研究气态核环的形成如何受到条形图速度和湍流强度的影响，并将结果与相对较高的声速进行比较。我们使用两个值的条形图速度，这些值已在文献中为我们的银河系（40和63 km s $^{ - 1} $ kpc $^{ - 1} $）讨论过。我们的结果表明，与没有湍流的模拟相比，湍流会产生较大和较小的核环，并增强气体迁移到银河系的内部PC。
The gas dynamics in the inner few kiloparsecs of barred galaxies often results in configurations that give rise to nuclear gas rings. However, the generic dynamical description of the formation of galactic nuclear rings does not take into account the effects of thermal pressure and turbulence. Here we perform 3D hydrodynamic simulations of gas in a galactic barred potential out to a radius of $2$~kpc. We include self-gravity and a large-scale turbulence-driving module. We study how the formation of gaseous nuclear rings is affected by changing the bar pattern speed and the strength of the turbulence, and compare the results to simulations with a relatively high sound speed. We use two values for the bar pattern speed that have been discussed in the literature for our Milky Way Galaxy (40 and 63 km s$^{-1}$ kpc$^{-1}$). Our results show that turbulence produces broader and smaller nuclear rings, and enhances gas migration towards the inner few pc of the galaxy, compared to simulations without turbulence.
