Cosmology in the non-linear regime : the small scale miracle

Understand

Interest rises to exploit the full shape information of the galaxy power spectrum, as well as pushing analyses to smaller non-linear scales.

• Here I use the halo model to quantify the information content in the tomographic angular power spectrum of galaxies, for future high resolution surveys : Euclid and SKA2.
• I study how this information varies as a function of the scale cut applied, either with angular cut $\ell_{max}$ or physical cut kmax.
• For this, I use analytical covariances with the most complete census of non-Gaussian terms, which proves critical.