Weller J
Astrophys J. 1999 Dec 10;527(1):L1-L4. doi: 10.1086/312392.
In a universe with inhomogeneous reionization, the ionized patches create a second-order signal in the cosmic microwave background polarization anisotropy. This signal originates in the coupling of the free-electron fluctuation to the quadruple moment of the temperature anisotropy. We examine the contribution from a simple inhomogeneous reionization model and find that the signal from such a process is below the detectable limits of the Planck Surveyor mission. However, the signal is above the fundamental uncertainty limit from cosmic variance, so that a future detection with a high-accuracy experiment on subarcminute scales is possible.
在一个再电离不均匀的宇宙中，电离斑块在宇宙微波背景偏振各向异性中产生二阶信号。这个信号源于自由电子涨落与温度各向异性四极矩的耦合。我们研究了一个简单的不均匀再电离模型的贡献，发现这样一个过程产生的信号低于普朗克巡天任务的可探测极限。然而，该信号高于宇宙涨落的基本不确定性极限，因此未来有可能通过高精度实验在亚角分尺度上进行探测。
