银河系千秒差距尺度风：混合Cosmic-Ray和热驱动外流
The Milky Way's Kiloparsec Scale Wind: A Hybrid Cosmic-Ray and Thermally Driven Outflow
摘要：
我们应用风模型，驱动相结合的宇宙射线和热气体压力，银河系，并表明，所观察到的银河系弥漫软X射线发射可以更好地解释风比以前的静态气体模型。我们发现，宇宙射线压力是必不可少的驱动所观察到的风。因此，定义了一个“最适合”的银河风模型，我们探索的基础参数的变化，并显示风的属性如何随气体压力，宇宙射线压力和密度的变化而变化。我们证明了宇宙射线在发射风中的重要性，以及宇宙射线对风动力学的影响。此外，这个模型支持了Breitschwerdt和合作者的假设，即这样的风可能有助于解释在伽马射线发射中观察到的相对较小的梯度作为银河系半径的函数。
英文摘要：
We apply a wind model, driven by combined cosmic-ray and thermal-gas pressure, to the Milky Way, and show that the observed Galactic diffuse soft X-ray emission can be better explained by a wind than by previous static gas models. We find that cosmic-ray pressure is essential to driving the observed wind. Having thus defined a "best-fit" model for a Galactic wind, we explore variations in the base parameters and show how the wind's properties vary with changes in gas pressure, cosmic-ray pressure and density. We demonstrate the importance of cosmic rays in launching winds, and the effect cosmic rays have on wind dynamics. In addition, this model adds support to the hypothesis of Breitschwerdt and collaborators that such a wind may help explain the relatively small gradient observed in gamma-ray emission as a function of galactocentric radius.
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