Constraints on CDM cosmology from galaxy power spectrum, CMB and SNIa evolution

Understand

We examine the constraints that can be obtained on standard cold dark matter models from the most currently used data set: CMB anisotropies, type Ia supernovae and the SDSS luminous red galaxies.

• We also examine how these constraints are widened when the equation of state parameter $w$ and the curvature parameter $\Omega_k$ are left as free parameters.
• For the $\Lambda$CDM model, our 'vanilla' model, cosmological parameters are tightly constrained and consistent with current estimates from various methods.
• When the dark energy parameter $w$ is free we find that the constraints remain mostly unchanged, i.e.