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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.

preprint2011arXivOpen access
Shahab JoudakiOlivier DoreLuis FerramachoManoj KaplinghatMario G. Santos
astro-ph.CO
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Shahab JoudakiOlivier DoreLuis FerramachoManoj KaplinghatMario G. Santos

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