The traditional clustering analyses of galaxy redshift surveys compress the clustering data into a set of late-time physical variables in a model-independent way. This approach has recently been extended by an additional shape variable encoding early-time physics information. We apply this new technique, ShapeFit, to SDSS-III BOSS data and show that it matches the constraining power of alternative, model-dependent approaches, which directly constrain the model’s parameters adopting a cosmological model ab initio. ShapeFit is $\sim 30$ times faster, model independent, naturally splits early- and late-time variables, and enables a better control of observational systematics.

Close

PrevNext

View figure in article

• Cosmological constant
• Cosmological parameters
• Evolution of the Universe
• Large scale structure of the Universe