The Hubble tension and the magnetic universe
ARC Seminar: 05 February 2021 by Prof Levon Pogosian from the Simon Fraser University. Abstract: The standard cosmological model determined from the accurate cosmic microwave background measurements made by the Planck satellite implies a value of the Hubble constant H0 that is 4.2 standard deviations lower than the one determined from Type Ia supernovae by the SH0ES collaboration. We have found that accounting for the enhanced recombination rate due to the additional inhomogeneities in the baryon density induced by primordial magnetic fields can help to reconcile these two measurements. Intriguingly, the strength of the magnetic field required to solve the Hubble tension is of the right order of magnitude to also explain the observed galactic, cluster and intergalactic fields. Our results motivate further detailed studies of primordial magnetic fields, setting several well-defined targets for future observations. The Astrophysics Research Centre (ARC) is part of the College of Agriculture, Engineering and Science at the University of KwaZulu-Natal (UKZN). We strive to be a world-class centre of excellence for research and postgraduate training in astrophysics and related data-intensive science. WATCH NEXT: ○ The Commensal Radio Astronomy FAST Survey CRAFTS - • The Commensal Radio Astronomy FAST Survey ... ○ The conundrum of Hubble constant: A physical solution - • The conundrum of Hubble constant: A physic... ○ Searching for Dark Matter in the Sky - • Searching for Dark Matter in the Sky ○ Radial distribution of HI in disk dominated galaxies - • Radial distribution of HI in disk dominate... ○ Determining the Universe’s Initial Conditions - • Determining the Universe’s Initial Conditions ○ Subscribe to our channel / @astrophysicsresearchcentre3142 ○ Like us on Facebook / astrophysicsresearchcentre ○ Read our tweets on Twitter / arc_ukzn ○ Follow us on Instagram / astrophysicsresearchcentre ○ Visit our Website https://astro.ukzn.ac.za
