301 citations · 1.2k across the 28 of their papers we have counts for
4 papers · 1 filter
Galactic dynamo action in presence of stochastic alpha and shear
Sharanya Sur, Kandaswamy Subramanian
Using a one-dimensional -dynamo model appropriate to galaxies, we study the possibility of dynamo action driven by a stochastic alpha effect and shear. To determine the field e…
Kinematic alpha effect in isotropic turbulence simulations
Sharanya Sur, Axel Brandenburg, Kandaswamy Subramanian
Using numerical simulations at moderate magnetic Reynolds numbers up to 220 it is shown that in the kinematic regime, isotropic helical turbulence leads to an alpha effect and a tu…
Kinetic and magnetic alpha effects in nonlinear dynamo theory
Sharanya Sur, Kandaswamy Subramanian, Axel Brandenburg
The backreaction of the Lorentz force on the alpha-effect is studied in the limit of small magnetic and fluid Reynolds numbers, using the first order smoothing approximation (FOSA)…
Galactic dynamos supported by magnetic helicity fluxes
Sharanya Sur, Anvar Shukurov, Kandaswamy Subramanian
We present a simple semi-analytical model of nonlinear, mean-field galactic dynamos and use it to study the effects of various magnetic helicity fluxes. The dynamo equations are re…