Anisotropies in the stochastic gravitational-wave background: Formalism and the cosmic string case

Anisotropies in the stochastic gravitational-wave background: Formalism and the cosmic string case
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随机引力波背景中的各向异性:形式主义和宇宙弦情况

DOI:
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发表时间:
2018
期刊:
影响因子:
5
通讯作者:
M. Sakellariadou
M. Sakellariadou
中科院分区:
物理与天体物理2区
文献类型:
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作者:
A. Jenkins;M. Sakellariadou

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我们开发了一个强大的分析形式主义计算随机引力波背景的能量密度,包括其各向异性的完整描述。这是完全普遍的,可以应用于任何天体物理学或宇宙学的来源。作为一个例子,我们应用这些工具的情况下,网络的南部-后藤宇宙弦。我们发现,各向异性是相对不敏感的选择模型的字符串网络,但它们是非常敏感的字符串张力$GMU$的值。
We develop a powerful analytical formalism for calculating the energy density of the stochastic gravitational wave background, including a full description of its anisotropies. This is completely general, and can be applied to any astrophysical or cosmological source. As an example, we apply these tools to the case of a network of Nambu-Goto cosmic strings. We find that the anisotropies are relatively insensitive to the choice of model for the string network, but that they are very sensitive to the value of the string tension $Gmu$.