Backgrounds and the High Redshift Universe

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

There are many ways to observe the high redshift universe. One of these is to study backgrounds, from the near infrared to the radio. These backgrounds can give information about the properties of star formation from intermediate redshifts (z 2-4) to high redshifts (z>6). One of the benefits of observing backgrounds is that they trace the star formation that is occurring in the majority of galaxies, not just those bright enough to be seen in high redshift galaxy surveys. I will discuss our recent theoretical work, as well as our analysis and interpretation of observations from the Herschel Space Telescope. Our results includes analysis of the mean intensity, fluctuations, and fractional anisotropy of the backgrounds. This gives information to constrain the epoch of reionization, including the mass of halos responsible for reionization, the escape fraction, and the star formation rate. Furthermore, I will talk about our attempts to resolve the background in the far infrared, and the strength of these observations, including our tests to assess the stability of stacking analysis. Lastly, I will discuss the prospects of future observations.

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