Testing New Early Dark Energy
Title: Testing New Early Dark Energy
DNr: NAISS 2023/22-1245
Project Type: NAISS Small Compute
Principal Investigator: Florian Niedermann <florian.niedermann@su.se>
Affiliation: Stockholms universitet
Duration: 2023-11-27 – 2024-12-01
Classification: 10305


We will investigate the New Early Dark Energy (NEDE) model as a resolution to the Hubble tension, one of the major problems in contemporary cosmology. NEDE is among the leading proposals. It resolves the Hubble tension through a phase transition in the early universe and replaces our current cosmological standard model, LambdaCDM. This project is supported by the VR Starting Grant 2022-03160 of the Swedish Research Council. For a seminal paper on NEDE see https://inspirehep.net/literature/1800935. In particular, we will test the model against current cosmological datasets such as the temperature and polarisation maps from the cosmic microwave background (the first light emitted after the Big Bang), baryonic acoustic oscillations (data from Galaxy surveys), supernovae, and large-scale structure data. In this project, we will perform a limited data analysis to familiarise ourselves with the SNIC computing environment. Ultimately, this is supposed to lead to an application for more extensive computing resources.