Near-infrared Extragalactic Background Light Fluctuations on Nonlinear Scales

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 intra-halo (IHL) has been proposed as a possible explanation for signal. In this work, we investigate emission integrated galaxy (IGL) and IHL in spectrum EBL fluctuations using simulated catalog MICECAT. We that $\ell\sim10^3$, one-halo clustering satellite galaxies comparable to two-halo term IGL spectrum. some previous analyses, model assumed small signal, which may result overestimating contribution EBL. also dependence IGL$+$IHL distribution function redshift halo mass, spatial profile within halo. Our forecast suggests upcoming SPHEREx deep field survey can distinguish different models considered work with high significance. Finally, quantify bias correlation mask not accounted analyses.