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arXiv 2302.09165astro-ph.GA
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星暴驱动的超级风的流体动力学模拟和含时光电离模拟

Hydrodynamic Simulations and Time-dependent Photoionization Modeling of Starburst-driven Superwinds

A. Danehkar, M. S. Oey, W. J. Gray

摘要:

星暴星系中OB星团的热能沉积导致了星系超级风的形成。对恒星爆发驱动的超级风的多波长观测指出,复杂的热和电离结构不能用简单的绝热假设来充分解释。在这项研究中,我们进行流体动力学模拟耦合到辐射冷却功能的流体模型,并产生依赖于时间的非平衡光电离模型来预测的物理条件和电离结构的超级风使用MAIHEM原子和冷却包建立在程序FLASH。我们的模拟产生的随时间变化的电离状态和物理条件被用来计算各种参数的超级风的发射线,这使我们能够探索潜在的辐射冷却的星爆区域的非平衡电离的影响。

英文摘要:

Thermal energies deposited by OB stellar clusters in starburst galaxies lead to the formation of galactic superwinds. Multi-wavelength observations of starburst-driven superwinds pointed at complex thermal and ionization structures which cannot adequately be explained by simple adiabatic assumptions. In this study, we perform hydrodynamic simulations of a fluid model coupled to radiative cooling functions, and generate time-dependent non-equilibrium photoionization models to predict physical conditions and ionization structures of superwinds using the MAIHEM atomic and cooling package built on the program FLASH. Time-dependent ionization states and physical conditions produced by our simulations are used to calculate the emission lines of superwinds for various parameters, which allow us to explore implications of non-equilibrium ionization for starburst regions with potential radiative cooling.

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