1-5 July 2019
Faculty of Physics, University of Warsaw
Europe/Warsaw timezone

Constraining the interacting vacuum scenario

Not scheduled
20m
Faculty of Physics, University of Warsaw

Faculty of Physics, University of Warsaw

conference hall 0.03, Faculty of Physics, University of Warsaw ul. Pasteura 5, 02-093 Warszawa Poland
Poster session

Speaker

Ms Natalie Hogg (Institute of Cosmology and Gravitation)

Description

It is well-known that there are problems with the standard model of cosmology that hint at possible physics beyond the $\Lambda$CDM paradigm. In particular, the 4$\sigma$ tension in the values of $H_0$ coming from CMB and supernovae measurements is motivation enough to consider alternative cosmological models.

In this talk, I will introduce one such model, the interacting vacuum scenario. Beginning with the covariant theory of the interaction, I will show the linear theory of perturbations in the scenario before specialising to the spatially flat FLRW background. I will describe how the interaction parameter can be constrained using MCMC methods and show the results of our investigation for both a constant and a dynamical interaction, focusing on the effects of the interaction on the cosmological tensions.

Primary author

Ms Natalie Hogg (Institute of Cosmology and Gravitation)

Co-authors

Presentation Materials

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