论文标题
部分可观测时空混沌系统的无模型预测
Inverse Compton emission from heavy WIMP annihilations in the Galactic Centre
论文作者
论文摘要
储层计算是预测湍流的有力工具，其简单的架构具有处理大型系统的计算效率。然而，其实现通常需要完整的状态向量测量和系统非线性知识。我们使用非线性投影函数将系统测量扩展到高维空间，然后将其输入到储层中以获得预测。我们展示了这种储层计算网络在时空混沌系统上的应用，该系统模拟了湍流的若干特征。我们表明，使用径向基函数作为非线性投影器，即使只有部分观测并且不知道控制方程，也能稳健地捕捉复杂的系统非线性。最后，我们表明，当测量稀疏、不完整且带有噪声，甚至控制方程变得不准确时，我们的网络仍然可以产生相当准确的预测，从而为实际湍流系统的无模型预测铺平了道路。
A thermal relic WIMP remains a prime candidate for the nature of Dark Matter, particularly for the more poorly constrained case of a heavy ($\gtrsim$ 1 TeV) WIMP. The highest fluxes from WIMP annihilations are expected in the region of the Galactic Centre (GC) where current and near future gamma-ray observatories can be exploited to place tight limits on the WIMP paradigm. It is regularly noted that the annihilation flux of gammas will be accompanied by charged secondary particles which can produce 'delayed' inverse Compton (IC) gamma-ray emission, but this component is often neglected in indirect Dark Matter searches. In this work the inverse Compton emission is studied for the specific conditions of heavy WIMP annihilation in the GC. Using models for the magnetic and radiation fields of the region, and taking into consideration the transport of secondary particles, we find that for TeV WIMPs the IC component cannot be neglected in the GC, with the particles produced cooling within the region rather than propagating out in to the Galaxy. This effect changes the predicted spectral shape substantially and thus boosts the detection prospects for heavy WIMPs.
