During his studies, Emil researched novel methods of analysing and computing predictions from new, exotic models of the Universe that have recently been proposed to reconcile discrepancies in the measured values of the current expansion rate of the Universe. In particular, Emil showed that traditional Bayesian analyses of these models may be misleading, and promoted a supplementary frequentist method, using so-called profile likelihoods, by illustrating its ability to detect these biases in a wide range of non-standard Universes and, additionally, developing an effective analysis framework usable by the wider cosmological community. Ultimately, Emil’s research on combining the two approaches contributes to a more nuanced understanding of the recently proposed extensions to the standard cosmological model, and, by extension, of what makes up our Universe.

The PhD degree was completed at the Department of Physics and Astronomy (IFA), Faculty of Natural Sciences, Aarhus University.

This summary was prepared by the PhD student.

Time: Friday 6 September 2024 at 9:30
Place: Building 1525, room 626, Det Skæve Rum, Department of Physics and Astronomy, Ny Munkegade 120, Aarhus University, 8000 Aarhus C.
Title of dissertation: Computation and Analysis of Non-Standard Universes
Contact information: Emil Brinch Holm, e-mail: emil.brinch@hotmail.com, tel.: +45 26991744
Members of the assessment committee:
Professor Julien Lesgourgues, Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen, Germany
Professor Alan Heavens, Department of Physics, Imperial College, United Kingdom
Associate Professor Jan Arlt, Department of Physics and Astronomy, Aarhus University (chair)
Main supervisor: Associate Professor Thomas Tram, IFA, Aarhus University
Co-supervisor: Professor Steen Hannestad, IFA, Aarhus University

Language: The PhD dissertation will be defended in English

The defence is public.
The PhD thesis is available for reading at the Graduate School of Natural Sciences/GSNS, Ny Munkegade 120, building 1521, 8000 Aarhus C.