Primordial non-Gaussianity from the 21 cm Power Spectrum during the Epoch of Reionization

Autor:	Joudaki, Shahab, Dore, Olivier, Ferramacho, Luis, Kaplinghat, Manoj, Santos, Mario G.
Rok vydání:	2011
Předmět:	Astrophysics - Cosmology and Extragalactic Astrophysics
Zdroj:	Phys.Rev.Lett.107:131304,2011
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.107.131304
Popis:	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. Comment: Minor changes, reflects version accepted for publication in PRL
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1105.1773 Zobrazit plný text záznamu View this record from Arxiv