Imprints of non-standard Dark Energy and Dark Matter Models on the 21cm Intensity Map Power Spectrum

Understand

We study the imprint of non-standard dark energy (DE) and dark matter (DM) models on the 21cm intensity map power spectra from high-redshift neutral hydrogen (HI) gas.

• To this purpose we use halo catalogs from N-body simulations of dynamical DE models and DM scenarios which are statistically indistinguishable from the standard Cold Dark Matter model with Cosmological Constant (LCDM) using currently available cosmological observations.
• We limit our analysis to halo catalogs at redshift z = 1 and 2.3 which are common to all simulations.
• For each catalog we model the HI distribution by using a simple prescription to associate the HI gas mass to N-body halos.