Speaker
Description
The nature of dark energy remains one of the central open problems in cosmology, commonly parameterised through the equation of state w(z). The inference of the dark energy equation of state w(z) is typically performed within the homogeneous FLRW paradigm. However, cosmic structure introduces inhomogeneities that can impact both observables and their interpretation. In this talk, I discuss how cosmic inhomogeneities influence both observables and their interpretation, with particular focus on the reconstruction of w(z). I highlight mechanisms through which structure and light propagation effects can bias estimates of the expansion history, potentially mimicking signatures of dynamical dark energy or inducing apparent redshift evolution in w(z).
| Research Area | Cosmology: late universe |
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