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 at 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.
Center for Cosmology, Department of Physics and Astronomy, University of California, Irvine, 92697, USA.
Shahab
S
Joudaki
Olivier
O
Doré
Luis
L
Ferramacho
Manoj
M
Kaplinghat
Mario G
MG
Santos