Fredagskollokvium: Modeling the cosmological evolution of magnetic fields

Romain Teyssier, Department of Astrophysical Sciences, Princeton University (USA).

portrettbildet av en man
Romain Teyssier is professor of Astrophysical Sciences and Applied and Computational Mathematics at Princeton University.

Magnetic fields are ubiquitous in galaxies, around galaxies and possibly in the intergalactic medium (IGM). Explaining their origin is a challenging task based on complex magnetohydrodynamic (MHD) numerical simulations.
I will report on our recent work modeling the creation of seed fields through the Biermann battery process, the amplification of these seed fields through the turbulent dynamo process and finally the dispersion of these equipartition fields in the IGM through galactic outflows.
I will discuss the pros and the cons of this scenario in light of current observations.

 

graphs showing a simulation of a dwarf star at different stages
Simulation of an isolated dwarf galaxy with (toot) and without (left) supernova feedback.

 


This Friday colloquium will be hybrid. Attendees can therefore participate either in-person or via Zoom. Please join via Zoom at

https://uio.zoom.us/j/69001043754?pwd=cEJpbVE5ci9PdWNtRld2TDNNcGtKdz09

Meeting ID: 690 0104 3754

Passcode: PeiseStua3

Attendees will be muted during the colloquium, but will have the opportunity to ask questions at the end by clicking on the "raise hand” button (or send a request via chat).

Emneord: fredagskollokvium, institute seminar, computational astrophysics, Cosmology, Galaxy formation
Publisert 26. aug. 2022 16:03 - Sist endret 28. aug. 2022 19:22