Cumulative light from the Epoch of Reionization - the Near Infrared Background and the 21cm line.

Observations of the Epoch of Reionization are now becoming a distinct possibility. High-redshift galaxy surveys are discovering galaxies well into the Epoch of Reionization. However, these observations present a small portion of the total picture, providing information on only the brightest objects within the survey. I will discuss two other observations that can reveal information on reionization history. Cumulative light from all galaxies, including those numerous galaxies below the detection limit of high redshift galaxy surveys, would be present in the Near Infrared Background. Emission from the 21cm line would originate from neutral areas in the IGM, and would be reveal information about the early stages of reionization. I will present theoretical modeling of both the 21cm line and the Near Infrared Background, and show how these two observations are correlated. This can help reveal information about the buildup of galaxies, their stellar populations, and reionization history.