New electro-acoustic waves in a degenerate quantum plasma system

TL;DR

This paper predicts and analyzes new electro-acoustic waves in degenerate quantum plasmas, highlighting their unique dependence on degenerate pressure and providing a dispersion relation applicable to white dwarf stars.

Contribution

It introduces and derives the dispersion relation for degenerate pressure driven EA waves in quantum plasmas, a phenomenon not previously described.

Findings

New DPDEA waves depend on degenerate pressure

Dispersion relation derived for the first time

Application to white dwarf plasma system

Abstract

The existence of new electro-acoustic (EA) waves [named here `degenerate pressure driven EA' (DPDEA) waves] propagating in a degenerate quantum plasma (DQP) system [containing non-inertial, cold, non-relativistically (NR)/ultra-relativistically (UR) degenerate electron species (DES), and inertial, cold, NR degenerate positive particle species (PPS)] is predicted for the first time. The DPDEA waves, in which the inertia is mainly provided by the mass density of the inertial PPS, and the restoring force is mainly provided by the non-inertial, NR/UR DES, are new since they are completely disappeared if the degenerate pressure of the plasma particle species is neglected. The dispersion relation (derived here for the first time) is applied in a white dwarf DQP system to show the dispersion properties of the new DPDEA waves.