论文标题
超级风向灾难性冷却。 iii。非平衡光电离
Catastrophic Cooling in Superwinds. III. Non-equilibrium Photoionization
论文作者
论文摘要
观察到某些Starburst驱动的银河系超级风波表明，强烈的辐射冷却可以在反馈的性质以及星形星系中的恒星和分子气体的形成中起关键作用。这些灾难性冷却的超级风很好地通过绝热流体模型来充分描述，但是可以通过将非平衡辐射冷却功能纳入流体模型来复制。在这项工作中，我们采用了在闪光流体动力法规框架中实施的原子和冷却模块Maihem，以模拟辐射冷却超级风的形成及其相应的非平衡电离（NEI）国家，以实现各种流出参数，气体金属金属和环境密度。我们采用光电报来预测这些辐射冷却超级风波的辐射和密度结合的光离子化，我们预测了紫外线和光学线发射。我们使用NEI状态构建的非平衡光电离模型证明了C IV的增强，尤其是在金属丰富的，灾难性冷却流出的流出和金属罚款的ovi中。
Observations of some starburst-driven galactic superwinds suggest that strong radiative cooling could play a key role in the nature of feedback and the formation of stars and molecular gas in star-forming galaxies. These catastrophically cooling superwinds are not adequately described by adiabatic fluid models, but they can be reproduced by incorporating non-equilibrium radiative cooling functions into the fluid model. In this work, we have employed the atomic and cooling module MAIHEM implemented in the framework of the FLASH hydrodynamics code to simulate the formation of radiatively cooling superwinds as well as their corresponding non-equilibrium ionization (NEI) states for various outflow parameters, gas metallicities, and ambient densities. We employ the photoionization program CLOUDY to predict radiation- and density-bounded photoionization for these radiatively cooling superwinds, and we predict UV and optical line emission. Our non-equilibrium photoionization models built with the NEI states demonstrate the enhancement of C IV, especially in metal-rich, catastrophically cooling outflows, and O VI in metal-poor ones.
