Diffusion and Coulomb separation of ions in dense matter

Abstract

We analyze diffusion equations in strongly coupled Coulomb mixtures of ions in dense stellar matter. Strong coupling of ions in the presence of gravitational forces and electric fields (induced by plasma polarization in the presence of gravity) produces a specific diffusion current which can separate ions with the same A/Z (mass to charge number) ratios but different Z. This Coulomb separation of ions can be important for the evolution of white dwarfs and neutron stars.

5 pages, 2 figures; slightly updated with respect to version 1

References in corpus (4)

• Evolution of white dwarf stars with high-metallicity progenitors: the role of 22Ne diffusion
• Diffusion of Neon in White Dwarf Stars
• Diffusive Nuclear Burning of Helium on Neutron Stars
• Diffusion in Coulomb Crystals

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