Primordial non-Gaussianities in the Intergalactic Medium

Understand

We present results from the first high-resolution hydrodynamical simulations of non-Gaussian cosmological models.

• We focus on the statistical properties of the transmitted Lyman-alpha flux in the high redshift intergalactic medium.
• Imprints of non-Gaussianity are present and are larger at high redshifts.
• Differences larger than 20 % at z>3 in the flux probability distribution function for high transmissivity regions (voids) are expected for values of the non linearity parameter f_NL=\pm 100 when compared to a standard LCDM cosmology with f_NL=0.