Primordial non-Gaussianity from the 21 cm Power Spectrum during the   Epoch of Reionization
  Primordial non-Gaussianity is a crucial test of inflationary cosmology. We consider the impact of non-Gaussianity on the ionization power spectrum from 21 cm emission during the epoch of reionization. We focus on the power spectrum on large scales at redshifts of 7 to 8 and explore the expected constraint on the local non-Gaussianity parameter f_NL for current and next-generation 21 cm experiments. We show that experiments such as SKA and MWA could measure f_NL values of order 10. This can be improved by an order of magnitude with a fast-Fourier transform telescope like Omniscope. 
Shahab Joudaki (UC Irvine), Olivier Dore (JPL, Caltech), Luis   Ferramacho (CNRS, Toulouse), Manoj Kaplinghat (UC Irvine), M...
astro-ph.CO