论文标题
一个$μ$来统治它们：CMB光谱畸变可以探测域墙，宇宙字符串和低尺度相变
One $μ$ to rule them all: CMB spectral distortions can probe domain walls, cosmic strings and low scale phase transitions
论文作者
论文摘要
我们提出了一个新的纯粹重力耦合扇区的探针，该扇区具有大型各向异性。这些各向异性通过重力相互作用与重力 - 透明液的重力相互作用受阻，后者在此过程中加热。注入的热量会导致宇宙微波背景光谱的可测量失真。我们给出了扭曲大小的分析估计，并概述了如何从第一原理中计算它们。这些方法以域壁/宇宙字符串网络的形式应用于各向异性，或者是由一阶相变或标量场动力学引起的。我们发现，这种方法可以潜在地探测以前不受约束的参数空间的大区域，并且与对这种黑暗部门引起的引力波的上级搜索非常互补。
We present a new probe of purely gravitationally coupled sectors with large anisotropies. These anisotropies are damped via gravitational interactions with the baryon-photon fluid, which is heated up in the process. The injected heat causes measurable distortions of the cosmic microwave background spectrum. We give analytic estimates for the size of the distortions and outline how to calculate them from first principles. These methods are applied to anisotropies in the form of a domain wall/cosmic string network or caused by a first order phase transition or scalar field dynamics. We find that this method can potentially probe large regions of previously unconstrained parameter space and is very much complementary to up-coming searches of gravitational waves caused by such dark sectors.
