Fluctuation to mean field dynamos: The search for coherence
by
Prof.Kandaswamy Subramanian(Inter University Centre for Astronomy Astrophysics)
→
Europe/Stockholm
122:026
122:026
Description
Fluctuation dynamos could be important in generating the first magnetic fields
in galaxies and also maintaining the fields in galaxy clusters. Mean field dynamos
would be important in explaining the fields on scales larger than the scale
of the forcing. An issue which is often debated is whether the generated fields
are coherent enough to explain the observations. This talk focuses on this issue and
discusses various lines of evidence which suggests that these dynamos
can indeed produce coherent enough fields. Further, the issue of how to explain
magnetic spiral arms seen in several disk galaxies is also addressed.