Instability-driven interfacial dynamo in protoneutron stars
A Mastrano, A Melatos
MNRAS | OXFORD UNIV PRESS | Published : 2011
The existence of a tachocline in the Sun has been proven by helioseismology. It is unknown whether a similar shear layer, widely regarded as the seat of magnetic dynamo action, also exists in a protoneutron star. Sudden jumps in magnetic diffusivity η and turbulent vorticity α, for example at the interface between the neutron-finger and convective zones, are known to be capable of enhancing mean-field dynamo effects in a protoneutron star. Here, we apply the well-known, plane-parallel, MacGregor-Charbonneau analysis of the solar interfacial dynamo to the protoneutron star problem and analytically calculate the growth rate under a range of conditions. It is shown that, like the solar dynamo, ..View full abstract
This work is supported by the Melbourne University International Postgraduate Research Scholarship and the Albert Shimmins Memorial Fund.