论文标题
费米气泡发射的银河微风起源
Galactic breeze origin for the Fermi bubbles emission
论文作者
论文摘要
费米气泡的起源构成了银河平面上方和下方的两个伽马射线发射裂片，但仍不清楚。此处探索了这种费米气泡伽玛射线发射的可能性源自在这里探索以亚型银河流出或微风为前流的宽容宇宙射线。微风溶液的模拟和随后的宇宙射线传输是使用冥王星与宇宙射线传输代码结合使用的流体动力密码进行的。发现获得的银河流出模型与费米气泡区域中气体的流出速度曲线的推断兼容，并且有证据表明存在大量的热离子气体在银河系光环区域中。尽管很简单，但发现该模型能够在高银河纬度上重现观察到的费米 - 拉特能量通量。遵循这些结果，对1-3〜TEV光子的伽马射线发射的预测进行了与CTA/SWGO测量结果进行比较。
The origin of the Fermi bubbles, which constitute two gamma-ray emitting lobes above and below the Galactic plane, remains unclear. The possibility that this Fermi bubbles gamma-ray emission originates from hadronic cosmic rays advected by a subsonic Galactic outflow, or breeze, is here explored. The simulation of a breeze solution and subsequent cosmic ray transport is carried out using the hydrodynamical code, PLUTO, in combination with a cosmic ray transport code. The Galactic outflow model obtained is found to be compatible with both inferences of the decelerating outflow velocity profile of the gas in the Fermi bubbles region, and evidence for the presence of a large amount of hot ionised gas out in the Galactic halo region. Although simple, this model is found to be able to reproduce the observed Fermi-LAT energy flux at high Galactic latitudes. Following these results a prediction concerning the gamma-ray emission for 1-3~TeV photons is made for future comparison with CTA/SWGO measurements.
