• Can the Hubble tension be resolved by bulk viscosity? 

      Normann, Ben David; Brevik, Iver Håkon (Journal article; Peer reviewed, 2021)
      We show that the cosmic bulk viscosity estimated in our previous works is sufficient to bridge the H0 value inferred from observations of the early universe with the value inferred from the local (late) universe.
    • CosmoAI: A study of gravitational lensing through simulation and machine learning 

      Ingebrigtsen, Simon; Remøy, Sondre Westbø; Runde, Simon Nedreberg; Austnes, Einar Leite (Bachelor thesis, 2022)
      Gravitasjonslinsing brukes som et verktøy for å lokalisere og kartlegge mørk materie i universet. Gjennom Roulette-formalismen håper man at informasjon i linsen kan tolkes ved hjelp av ett felles matematisk rammeverk. ...
    • General bulk-viscous solutions and estimates of bulk viscosity in the cosmic fluid 

      Normann, Ben David; Brevik, Iver Håkon (Journal article; Peer reviewed, 2016)
      We derive a general formalism for bulk viscous solutions of the energy-conservation equation for ρ(a,ζ) ρ(a,ζ) , both for a single-component and a multicomponent fluid in the Friedmann universe. For our purposes, these ...
    • Intergalactic Machine Vision 

      Lynghjem Vegsund, Kristian; Sukarevicius, Modestas (Bachelor thesis, 2023)
      Gravitasjonslinser gir oss en unik indirekte innsikt i mørk materie, og tillater oss å kartlegge mørk materies fordeling i universet. I dette prosjektet skal vi fortsette utviklingen på et åpent kildekode-prosjekt som ...
    • Remarks on cosmological bulk viscosity in different epochs 

      Brevik, Iver Håkon; Normann, Ben David (Peer reviewed; Journal article, 2020)
      The intention of this paper is mainly two-fold. First, we point out a striking numerical agreement between the bulk viscosity in the lepton era calculated by Husdal (2016) and our own calculations of the present-day bulk ...
    • Viscous cosmology - Bulk viscosity in the cosmological context 

      Normann, Ben David (Master thesis, 2015)
      The main objective of this thesis has been to estimate the present value of the bulk viscosity of the cosmic fluid. The following list contains a summary of the main results found in the present work: -The bulk viscosity ...