宇宙射线与塌缩结构的光谱畸变
Cosmic Rays and Spectral Distortions from Collapsing Textures
摘要：
我们计算了宇宙纹理的标度分布的解旋产生的光子和中微子的能谱，并讨论了高能宇宙射线谱和CMB谱畸变的影响。纹理导致对光子通量的贡献，其按$E^3 F(E) \sim E^{3/2}$缩放。因此，对纹理模型的最严格约束来自原始光子可以到达我们而不被CMB和其他前景散射的最高能量。纹理导致$μ$型和$y$型失真。虽然来自当前COBE边界的纹理模型上的约束比来自CMB的角功率谱的边界弱，但未来的调查（例如PIXIE）可以导致更强的边界。高能量中微子通量的约束从皮埃尔俄歇实验的数据，并产生一个约束的能量尺度的纹理，这是竞争的CMB边界。
英文摘要：
We compute the energy spectrum of photons and neutrinos produced by the unwinding of a scaling distribution of cosmic textures, and discuss the implications for the spectrum of high energy cosmic rays, and for CMB spectral distortions. Textures lead to a contribution to the photon flux which scales as $E^3 F(E) \sim E^{3/2}$. Hence, the tightest constraints on the texture model come from the highest energies from which primordial photons can reach us without being scattered by the CMB and other foregrounds. Textures lead to both $μ$ type and $y$ type distortions. While the constraints on the texture model coming from the current COBE bounds are weaker than the bounds from the angular power spectrum of the CMB, future surveys such as PIXIE can lead to stronger bounds. The high energy neutrino flux is constrained by data from the Pierre Auger experiment and yields a bound on the energy scale of textures which is competitive with CMB bounds.
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