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The First Magnetic Fields
George Davies, Lawrence M. Widrow
We demonstrate that the Biermann battery mechanism for the creation of large scale magnetic fields can arise in a simple model protogalaxy. Analytic calculations and numerical simu…
Self-similar collapse and the structure of dark matter halos: A fluid approach
Kandaswamy Subramanian
We explore the dynamical restrictions on the structure of dark matter halos through a study of cosmological self-similar gravitational collapse solutions. A fluid approach to the c…
The structure of dark matter halos in hierarchical clustering theories
Kandaswamy Subramanian, Renyue Cen, Jeremiah P. Ostriker
During hierarchical clustering, smaller masses generally collapse earlier than larger masses and so are denser on the average. The core of a small mass halo could be dense enough t…
A Unified treatment of small and large- scale dynamos in helical turbulence
Kandaswamy Subramanian
Helical turbulence is thought to provide the key to the generation of large-scale magnetic fields. Turbulence also generically leads to rapidly growing small-scale magnetic fields…
Thoughts on galactic magnetism
Kandaswamy Subramanian
Magnetic fields correlated on several kiloparsec scales are seen in spiral galaxies. Their origin could be due to amplification of a small seed field by a turbulent galactic dynamo…