提取“WMAP混浊”的系统效应
Systematic effects in the extraction of the 'WMAP haze'
摘要：
从WMAP微波天空图中提取“薄雾”是基于减去已知的前景，即自由（韧致辐射），热尘埃和同步加速器，每一个都被其他天空图追踪。虽然408兆赫全天巡天用于同步加速器模板，但WMAP波段为数十千兆赫，辐射宇宙射线电子的空间分布应该是完全不同的，因为它们在银河系中的扩散依赖于能量。这在剩余的天空图中引入的系统不确定性与所声称的霾相当，并且对于某些源分布，可以具有非常相似的光谱和纬度轮廓，甚至有点相似的形态。因此，在将“雾”解释为物理特征时必须谨慎，银河系中心的暗物质湮灭。
英文摘要：
The extraction of a 'haze' from the WMAP microwave skymaps is based on subtraction of known foregrounds, viz. free-free (bremsstrahlung), thermal dust and synchrotron, each traced by other skymaps. While the 408 MHz all-sky survey is used for the synchrotron template, the WMAP bands are at tens of GHz where the spatial distribution of the radiating cosmic ray electrons ought to be quite different because of the energy-dependence of their diffusion in the Galaxy. The systematic uncertainty this introduces in the residual skymap is comparable to the claimed haze and can, for certain source distributions, have a very similar spectrum and latitudinal profile and even a somewhat similar morphology. Hence caution must be exercised in interpreting the 'haze' as a physical signature of, e.g., dark matter annihilation in the Galactic centre.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
