Simulations and observational tests of primordial magnetic fields from Cosmic Microwave Background constraints

Simulations and observational tests of primordial magnetic fields from Cosmic Microwave Background constraints
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宇宙微波背景约束下原初磁场的模拟和观测测试

DOI:
10.1093/mnras/staa3532
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发表时间:
2021
影响因子:
4.8
通讯作者:
Brüggen
Brüggen
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Paoletti;Banfi;Finelli;Gheller;O’Sullivan;Brüggen

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我们提出了第一个宇宙学模拟的原始磁场来自宇宙微波背景观测的约束下,基于场的引力对宇宙学扰动的影响。我们用theenzocode演化了不同的原始磁场模型,并比较了它们在星系团、细丝和空洞中的可观测特征(和相对差异)。星系团的同步辐射功率和法拉第旋转测量的差异通常太小而无法检测到,而灯丝中存在的差异将通过平方公里阵列的更高灵敏度来检测。然而,一些统计的全天分析,如星系和漫射同步辐射功率之间的互相关,从背景射电星系的法拉第旋转结构函数,或超高能宇宙射线的到达方向的分析,已经可以用来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 theenzocode 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.
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影响因子: 4.8
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