论文标题
来自宇宙微波背景约束的原始磁场的模拟和观察测试
Simulations and observational tests of primordial magnetic fields from Cosmic Microwave Background constraints
论文作者
论文摘要
我们根据田间对宇宙学扰动的重力效应，介绍了宇宙微波背景观测来衍生的原始磁场的第一个宇宙学模拟。我们用{\ enzo}代码进化了不同的原始磁场模型，并比较了它们在星系簇，细丝和空隙中可观察到的签名（以及相对差异）。同步子无线电功率和来自星系簇的法拉第旋转度量的差异通常太小而无法检测到，而细丝中存在的差异将通过平方公里阵列的较高灵敏度进行测试。然而，几种统计全套分析，例如星系和弥漫性同步器功率之间的互相关，法拉第旋转结构从背景射电星系起作用，或者可以使用超高能宇宙射线到达方向的分析，可以用于约束这些原始场模型。
We present the first cosmological simulations of primordial magnetic fields derived from the constraints by the Cosmic Microwave Background observations, based on the fields' gravitational effect on cosmological perturbations. We evolved different primordial magnetic field models with the {\enzo} code and compared their observable signatures (and relative differences) in galaxy clusters, filaments and voids. The differences in synchrotron radio powers and Faraday Rotation measure from galaxy clusters are generally too small to be detected, whereas differences present in filaments will be testable with the higher sensitivity of the Square Kilometre Array. However, several statistical full-sky analyses, such as the cross-correlation between galaxies and diffuse synchrotron power, the Faraday Rotation structure functions from background radio galaxies, or the analysis of arrival direction of Ultra-High-Energy Cosmic Rays, can already be used to constrain these primordial field models.
