Constraints on σ8 from galaxy clustering in N-body simulations and semi-analytic models
Constraints on σ8 from galaxy clustering in N-body simulations and semi-analytic models
We generate mock galaxy catalogues for a grid of different cosmologies, using rescaled N-body simulations in tandem with a semi-analytic model run using consistent parameters. Because we predict the galaxy bias, rather than fitting it as a nuisance parameter, we obtain an almost pure constraint on σ8 by comparing the …