论文标题
非线性尺度上的近红外乳清背景光波动
Near-infrared Extragalactic Background Light Fluctuations on Nonlinear Scales
论文作者
论文摘要
几项关于近红外乳清外背景光（EBL）的波动研究发现，在数十分钟的尺度上（$ \ ell \ sim10^3 $）发现了过多的功率。已经提出了从halo内光（IHL）发出的发射，以解释过量信号的可能解释。在这项工作中，我们使用模拟的Galaxy目录MICECAT研究了EBL波动的功率谱中集成星系光（IGL）和IHL的发射。我们发现，在$ \ ell \ sim10^3 $时，来自卫星星系的一halo聚类具有与IGL功率谱中两个HALO术语相当的功率。在以前的EBL分析中，IGL模型假设了一个小的一半聚类信号，这可能导致高估IHL对EBL的贡献。我们还研究了IGL $+$ IHL功率谱对IHL分布的依赖性，这是Redshift和Halo质量的函数，以及Halo中的空间轮廓。我们的预测表明，即将进行的Spherex深层现场调查可以区分这项工作中考虑的不同IHL模型。最后，我们通过掩码和信号的相关性量化功率谱的偏差，这在先前的分析中尚未考虑。
Several fluctuation studies on the near-infrared extragalactic background light (EBL) find an excess power at tens of arcminute scales ($\ell\sim10^3$). Emission from the intra-halo light (IHL) has been proposed as a possible explanation for the excess signal. In this work, we investigate the emission from the integrated galaxy light (IGL) and IHL in the power spectrum of EBL fluctuations using the simulated galaxy catalog MICECAT. We find that at $\ell\sim10^3$, the one-halo clustering from satellite galaxies has comparable power to the two-halo term in the IGL power spectrum. In some previous EBL analyses, the IGL model assumed a small one-halo clustering signal, which may result in overestimating the IHL contribution to the EBL. We also investigate the dependence of the IGL$+$IHL power spectrum on the IHL distribution as a function of redshift and halo mass, and the spatial profile within the halo. Our forecast suggests that the upcoming SPHEREx deep field survey can distinguish different IHL models considered in this work with high significance. Finally, we quantify the bias in the power spectrum from the correlation of the mask and the signal, which has not been accounted for in previous analyses.
