Abstract

In this paper, we explore for the first time the interactions of the net downward, time-dependent, γ-pumping overlying an imposed layer of magnetic fluid, in a polytropic atmosphere. Our calculations show that an equipartition of energy, between the magnetic and kinetic components, must be reached for buoyancy-driven magnetic structures to rise into the pumping region. However, structures do not rise unhindered, as in a previous investigation. We show that the evolution and other features of the emerging magnetic flux structures are significantly affected by the temporal variation of the γ-pumping. The rate of emerging structures, the strength of magnetic concentrations and the extent to how far magnetic field can travel were all found to depend on the timescale of the γ-pumping.

Publication Type:	Article
Publisher Keywords:	Convection, instabilities, MHD, sun: interior, sun: magnetic fields
Subjects:	Q Science > QB Astronomy Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering
Departments:	School of Science & Technology > Mathematics

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