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Redshift drift in inhomogeneous universe models with concrete abstract cosmology

Sofie-Marie Koksbang
University of Southern Denmark

Redshift drift is an observable that we hope to measure within this century. It is well-known that the redshift drift yields a direct measurement of the expansion rate in FLRW models and within that setting its sign also directly establishes if the Universe has undergone accelerated expansion. But the real universe is not an FLRW universe: It has structures, and in order to interpret future redshift drift measurements reliably we need to know how these structures affect redshift drift. In the talk, I will start with a brief review of the concepts of redshift drift and cosmic backreaction before moving on to introduce the approach "concrete abstract cosmology". I will then discuss what results have been obtained using this approach regarding redshift drift in inhomogeneous universe models.

2022 November 24, 14:30

Online broadcast (Zoom)

Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia