# Dynamos versus magnetogenesis: astrophysics versus cosmology (Pencil Code school and user meeting workshop)

- Institution: CERN
- Department: Theory Colloquia
- Speaker: Axel Brandenburg
- Year: 2025
- Language: English
- Subjects: Astronomy and space
- Source: [CERN](https://videos.cern.ch/record/3022840)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

Magnetic fields occur spontaneously both in astrophysics and in the early universe. Their energy sources are rather different: kinetic energy of the plasma in astrophysics and a variety of other forms of energy including axions, scalar fields, and chiral fermions in the cosmological settings. However, both areas have in common that the magnetic field is amplified by a long wavelength instability. In this colloquium, I will survey astrophysical and cosmological magnetic fields and then present a selection of important recent findings.

This talk is also part of the Pencil Code school and user meeting workshop (https://indico.cern.ch/event/1548935) .

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## Lectures

1. [Dynamos versus magnetogenesis: astrophysics versus cosmology (Pencil Code school and user meeting workshop)](https://invisiblenetwork.ai/learn/cern/3022840/bae3689db43d), 1 h 3 min (CERN's player)