对混合Cosmic-Ray和热驱动银河风的同步加速器约束
Synchrotron Constraints on a Hybrid Cosmic-Ray and Thermally-Driven Galactic Wind
摘要：
宇宙射线和磁场可以对大规模星系风的发射产生重大影响。许多研究人员已经研究了宇宙射线的作用;我们的小组以前表明，宇宙射线和热驱动风可以解释软X射线发射到银河系中心。在本文中，我们计算的同步辐射从我们原来的风模型，并将其与观测结果进行比较;同步数据表明，早期的假设发射条件的风必须改变：我们需要改善早期的模型，限制发射区域的内部“分子环”的域，并通过降低磁场强度从先前假设的最大强度。有了这些物理动机的修改，我们发现，风模型可以同时适合无线电同步加速器和X射线发射，虽然该模型需要有一个更高的气体压力和密度比以前的模型，以重现所观察到的X射线发射措施在较小的“足迹”。磁场的下降也降低了宇宙射线加热的效果，需要比以前的模型更高的风底部温度。
英文摘要：
Cosmic rays and magnetic fields can substantially impact the launching of large-scale galactic winds. Many researchers have investigated the role of cosmic rays; our group previously showed that a cosmic-ray and thermally-driven wind could explain soft X-ray emission towards the center of the Galaxy. In this paper, we calculate the synchrotron emission from our original wind model and compare it to observations; the synchrotron data shows that earlier assumptions about the launching conditions of the wind must be changed: we are required to improve that earlier model by restricting the launching region to the domain of the inner "Molecular Ring", and by decreasing the magnetic field strength from the previously assumed maximum strength. With these physically-motived modifications, we find that a wind model can fit both the radio synchrotron and the X-ray emission, although that model is required to have a higher gas pressure and density than the previous model in order to reproduce the observed X-ray emission measure within the smaller `footprint'. The drop in magnetic field also decreases the effect of cosmic-ray heating, requiring a higher temperature at the base of the wind than the previous model.
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