论文标题
关于宇宙隔离气体中宇宙射线相互作用对观察到的高能中微子通量的贡献
On the contribution of cosmic-ray interactions in the circumgalactic gas to the observed high-energy neutrino flux
论文作者
论文摘要
逃避乳白色磁盘的宇宙射线与圆形气体相互作用，该气体填充了我们星系的病毒体积。这些相互作用应产生可在地球上观察到的能量弥漫性中微子和光子的保证通量。这种中微子通量对由Icecube Neutminino天文台衡量的频谱做出了合理的贡献：以这种方式发出的能量受到喀斯喀特伽马射线的限制，因为级联反应没有时间发展，但是与观察相一致，中间环的到达指示并不指向银河系。但是，先前的研究报告了对相应中微子通量的估计非常不同，因此目前尚不清楚对观察到的光谱的贡献是否必不可少。在这里，我们在各种关于宇宙射线频谱和传播培养基中的弥漫性中微子通量成分的计算中读取了该弥漫性中微子通量成分的计算。我们发现，即使有这些变化，只要满足了多通电子的约束，对观察到的中微子通量的这种贡献仍然是倾斜的。
Cosmic rays escaping the Milky-Way disk interact with circumgalactic gas which fills the virial volume of our Galaxy. These interactions should produce guaranteed fluxes of energetic diffuse neutrinos and photons observable at the Earth. This neutrino flux would be a plausible contribution to the spectrum measured by the IceCube neutrino observatory: the energy emitted in this way is weakly constrained from cascade gamma rays, since the cascades have no time to develop, but the arrival directions of the neutrinos do not point to the Galactic disk, in agreement with observations. However, previous studies reported very different estimates of the corresponding neutrino flux, so it was unclear if this contribution to the observed spectrum is essential. Here we readdress the calculation of this diffuse neutrino flux component under various assumptions about the cosmic-ray spectrum and propagation in the circumgalactic medium. We find that even with these variations, this contribution to the observed neutrino flux remains subleading provided multimessenger constraints are satisfied.
