Abstract The standard Λ Cold Dark Matter (ΛCDM) cosmological model provides a good
description of a wide range of astrophysical and cosmological data. However, there are a …

Most cosmological data analysis today relies on the Friedmann-Lemaître-Robertson-Walker
(FLRW) metric, providing the basis of the current standard cosmological model. Within this …

The comoving sound horizon at the baryon drag epoch, rd, encapsulates very important
physical information about the prerecombination era and serves as a cosmic standard ruler …

Relativistic cosmology can be formulated covariantly, but in dealing with numerical relativity
simulations a gauge choice is necessary. Although observables should be gauge-invariant …

How do we appropriately fit a model based on an idealized Friedmann-Lemaître Robertson-
Walker spacetime to observations made from a single location in a lumpy universe? We …

We study the impact of nearby inhomogeneities on an observer's inference of the Hubble
constant. Large-scale structures induce a dependence of cosmological parameters on …