مشخصات پژوهش

In this paper, we use quantum magnet ohydrodynami c as well as magnetohydrostat ic (MHS) models for a zero-temperature Fermi-Dirac plasma to s how the fundamental role of Landau orbital ferromagnetism (LOFER) on the magnetohydrostat ic stability of compact stars. It is revealed that the generalized flux-conserv ed equation of state of form B ¼ bq2s =3 only with conditions 0  s  1 and 0  b < ffiffiffiffiffiffi p2 p can lead to a stable compact stellar configuration. The distinct critical value bcr ¼ ffiffiffiffiffiffi p2 p is shown to affect the magnetohydrostatic stability of the LOFER (s ¼ 1) state and the magnetic field strength limit on the compact stellar configuration. Furthermore, the value of the parameter b is remarked to fundamentally alter the Chandrasekhar mass-radius relation and the known mass-limit on white dwarfs when the star is in LOFER state. Current findings can help to understand the role of flux-frozen ferromagnetism and its fundamental role on hydrostatic stability of relativistically degenerate super-dense plasmas such as white dwarfs.