Multi-redshift limits on the 21cm power spectrum from PAPER

Understand

The epoch of reionization power spectrum is expected to evolve strongly with redshift, and it is this variation with cosmic history that will allow us to begin to place constraints on the physics of reionization.

• The primary obstacle to the measurement of the EoR power spectrum is bright foreground emission.
• We present an analysis of observations from the Donald C.
• Backer Precision Array for Probing the Epoch of Reionization (PAPER) telescope which place new limits on the HI power spectrum over the redshift range of $7.5<z<10.5$, extending previously published single redshift results to cover the full range accessible to the instrument.