Modified Jeans Instability Criteria for Magnetized Systems

TL;DR

This paper investigates how intrinsic magnetization, electron tunneling, and Fermi pressure influence the Jeans instability in dense magnetized plasmas, revealing enhanced instability and spectral modifications due to magnetization effects.

Contribution

It introduces modified Jeans instability criteria accounting for intrinsic magnetization, electron tunneling, and Fermi pressure in magnetized plasmas, extending classical analyses.

Findings

Intrinsic magnetization enhances Jeans instability.

Magnetization significantly alters instability spectra.

Results suggest new stability considerations for dense plasmas.

Abstract

The Jeans instability is analyzed for dense magnetohydrodynamic plasmas with intrinsic magnetization, the latter due to collective electron spin effects. Furthermore, effects of electron tunneling as well as the Fermi pressure are included. It is found that the intrinsic magnetization of the plasma will enhance the Jeans instability, and can significantly modify the structure of the instability spectra. Implications and limitations of our results are discussed, as well as possible generalizations.