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Shear dynamo problem: Quasilinear kinematic theory
S. Sridhar, Kandaswamy Subramanian
Large-scale dynamo action due to turbulence in the presence of a linear shear flow is studied. Our treatment is quasilinear and kinematic but is non perturbative in the shear stren…
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…
Nonlinear magnetic diffusivity and alpha tensors in helical turbulence
A. Brandenburg, K. -H. Rädler, M. Rheinhardt +1
The effect of a dynamo-generated mean magnetic field of Beltrami type on the mean electromotive force is studied. In the absence of the mean magnetic field the turbulence is assume…
Primordial magnetic fields and formation of molecular hydrogen
Shiv K Sethi, Biman B. Nath, Kandaswamy Subramanian
We study the implications of primordial magnetic fields for the thermal and ionization history of the post-recombination era. In particular we compute the effects of dissipation of…
Magnetizing the universe
Kandaswamy Subramanian
The origin of cosmic magnetism is an issue of fundamental importance in astrophysics. We review here some of the ideas of how large scale magnetic fields in the universe, particula…
Constrained semi-analytical models of Galactic outflows
Saumyadip Samui, Kandaswamy Subramanian, Raghunathan Srianand
We present semi-analytic models of galactic outflows, constrained by available observations on high redshift star formation and reionization. Galactic outflows are modeled in a man…