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Disputation: Robert Bleckert Nils Håkan Wissing

Doctoral candidate Robert Bleckert Nils Håkan Wissing at the Institute of Theoretical Astrophysics, Faculty of Mathematics and Natural Sciences, is defending the thesis "Simulating Galactic Dynamo Processes with Smoothed Particle Magnetohydrodynamics" for the degree of Philosophiae Doctor.

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Doctoral candidate Robert Bleckert Nils Håkan Wissing. Photo: private.

Join the in-person disputation

The PhD defence and trial lecture will be 100% in-person. The room opens for participation just before the disputation starts, and closes for new participants approximately 15 minutes after the defence has begun.

Join the trial lecture - September 1. at 10:15 (Peisestua, room 304, 3rd floor at Svein Rosselands Hus)

"The role of magnetic fields during giant impacts in the solar system"

Conferral summary

Magnetiske felt er overalt i universet og spiller en viktig rolle i ulike astrofysiske systemer. For å forstå mer om universet er det viktig å undersøke disse systemene med numeriske simuleringer. I løpet av sin tid her har Robert utviklet en ny numerisk metode for å simulere galakser med magnetiske felt.

Main research findings

When we look out at the universe, we find that magnetic fields are everywhere. From solar flares to the launching of jets, magnetic fields play an important role for a wide range of systems. This includes galaxies, which have been found to host surprisingly strong magnetic fields compared to their predicted strength in the early universe. This means that there must have been significant amplification of the magnetic field during the evolution of these galaxies. But what kind of process could amplify the magnetic field this quickly? Enter magnetic dynamo processes, which describes the exponential growth of magnetic fields due to being stretched, twisted, and folded by the underlying fluid motions.

Due to astronomy being an observational science, an important approach to testing astrophysical theories is through the use of numerical simulations. This gives us a ’virtual’ lab to understand how a system will evolve in time. This thesis goes through the development of a new numerical method and its application to the magnetized core-collapse, magneto-rotational instability and galaxy formation. In our simulations of galaxy formation, we find that our new method can capture many of the dynamo processes, recreating the amplification needed to explain our observations.


Contact information for the Department

Tags: PhD defense, disputas
Published Aug. 18, 2022 9:59 AM - Last modified Aug. 18, 2022 10:48 AM