Magnetic fields - from the early to the contempory Universe
Nordita Events
Friday 11 April 2008
from 10:30
to 11:30 at
Nordita Seminar Room
Speaker :
Kandaswamy Subramanian (IUCAA)
Abstract :
Coherent large scale magnetic fields have been observed
in many objects probed till now, including galaxies and even
the intergalactic space in clusters of galaxies. Their origin and
evolution continues to remain intriguing. We discuss
a number of possibilities, from their origin during the period of
inflation or symmetry breaking phase transitions in the very
early universe, to battery and dynamo effects in the later
universe. Primordial fields may reveal themselves, by leaving
interesting signals in the Cosmic Microwave background radiation,
and also by affecting early structure formation in crucial ways.
We also discuss the current status of the astrophysical battery
and dynamo mechanisms needed to amplify and maintain cosmic magnetic
fields. We end with a brief, subjective summary of the program
on Turbulence and Dynamos, currently running at Nordita.
