Primordial non-Gaussianity from the 21 cm power spectrum during the epoch of reionization.
Phys Rev Lett
; 107(13): 131304, 2011 Sep 23.
Article
en En
| MEDLINE
| ID: mdl-22026840
ABSTRACT
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.
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Banco de datos:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Año:
2011
Tipo del documento:
Article
País de afiliación:
Estados Unidos