100 citations · 193 across the 3 of their papers we have counts for
9 papers · 1 filter
Can Cosmic Rays Heat the Intergalactic Medium?
Saumyadip Samui, Kandaswamy Subramanian, Raghunathan Srianand
Supernova explosions in the early star forming galaxies will accelerate cosmic rays (CRs). CRs are typically confined in the collapsed objects for a short period before escaping in…
Minimal tau approximation and simulations of the alpha effect
A. Brandenburg, K. Subramanian
The validity of a closure called the minimal tau approximation (MTA), is tested in the context of dynamo theory, wherein triple correlations are assumed to provide relaxation of th…
Nonlinear current helicity fluxes in turbulent dynamos and alpha quenching
Kandaswamy Subramanian, Axel Brandenburg
Large scale dynamos produce small scale current helicity as a waste product that quenches the large scale dynamo process (alpha effect). This quenching can be catastrophic (i.e.int…
Magnetic helicity in galactic dynamos
Kandaswamy Subramanian
Magnetic fields correlated on kiloparsec scales are seen in spiral galaxies. Their origin could be due to amplification of a small seed field by a turbulent galactic dynamo. We rev…
Synthesis of Small and Large scale Dynamos
Kandaswamy Subramanian
Using a closure model for the evolution of magnetic correlations, we uncover an interesting plausible saturated state of the small-scale fluctuation dynamo (SSD) and a novel anolog…
Large scale dynamos with ambipolar diffusion nonlinearity
Axel Brandenburg, Kandaswamy Subramanian
It is shown that ambipolar diffusion as a toy nonlinearity leads to very similar behaviour of large scale turbulent dynamos as full MHD. This is demonstrated using both direct simu…