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SUMMARY:Colloquium: Jennifer Schober (EPFL\, Switzerland)
DTSTART:20220331T123000Z
DTEND:20220331T133000Z
DTSTAMP:20260921T102108Z
UID:www.aip.de-1211
CATEGORIES:Scientific
CATEGORIES:Generic Event
CATEGORIES:Public
CONTACT:Sydney Barnes <sbarnes@aip.de>
DESCRIPTION:Cosmic magnetic fields: a new window to the early UniverseMagn
 etic fields are observed on virtually all length scales of the present-day
  Universe\, from planets and stars to galaxies and galaxy clusters. Observ
 ations of blazars suggest that even the intergalactic medium is permeated 
 by magnetic fields. Such large-scale fields were most likely generated ver
 y shortly after the Big Bang and therefore are a unique window into the ph
 ysics of the very early Universe. In my talk\, I will review theoretical m
 odels of magnetogenesis and confront these with observational constraints.
  I will address the possible origin of magnetic fields in the very early U
 niverse\, during inflation and the cosmological phase transitions\, as wel
 l as their pre-recombination evolution in magnetohydrodynamical (MHD) turb
 ulence. In particular\, I will present results from high-resolution numeri
 cal simulations that show an efficient amplification of magnetic energy du
 e to the so-called chiral anomaly\, a standard model effect that necessari
 ly leads to an extension of the MHD equations at high energies. 
LOCATION:Colloquium Zoom room
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