Speaker
Description
With the newest cosmological observations there was an increase in the precision that we measure cosmological parameters. This new precision also led to the emergence of discrepancies in different measurements of these parameters, the so-called cosmological tensions. These could hint systematic effects or new physics. Also, with this increase in precision comes an inflation in the number of nuisance parameters that enter the statistical analysis leading to possible marginalization or prior volume effects in standard MCMC statistical cosmological analysis that influence the resulting cosmological parameters inferred. In this talk, I will show a few instances where this volume effects are relevant. I will give particular attention to the case of the early dark energy, in the context of the Hubble tension, where we use the marginalization free method, the profile likelihood, to show that these effects are relevant. I finalize by pointing out that this effect needs to be taken into consideration in current and future parameter inference analysis since they are particularly important for the cosmological tensions.
