Evidence for a z < 8 origin of the source-subtracted near-infrared background

This paper extends our previous fluctuation analysis of the near-infrared background at 1.6 mu m tothe1.1 mu m( F110W) image of the Hubble Ultra Deep Field. When all detectable sources are removed, the ratio of fluctuation power in the two images is consistent with the ratio expected for faint, z < 8, sources, and is inconsistent with the expected ratio for galaxies with z > 8. We also use numerically redshifted model galaxy spectral energy distributions for 50 and 10 Myr old galaxies to predict the expected fluctuation power at 3.6 and 4.5 mu m to compare with recent Spitzer observations. The predicted fluctuation power for galaxies at z 0 12 matches the observed Spitzer fluctuation power, while the predicted power for z > 13 galaxies is much higher than the observed values. As was found in the 1.6 mu m ( F160W) analysis, the fluctuation power in the source- subtracted F110Wimage is 2 orders of magnitude below the power in the image with all sources present. This leads to the conclusion that the 0.8 - 1.8 mu m near- infrared background is due to resolved galaxies in the redshift range z < 8, with the majority of power in the redshift range of 0.5 - 1.5.