From Magnetic Collapse to Gravitational Collapse: Levels of Understanding of Magnetism*†

Wheeler, John Archibald

doi:10.1111/j.1749-6632.1975.tb36090.x

Cited by 6 publications

(5 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…and its formidable role on the stellar chain of evolution. It is also believed that the magnetic field has a fundamental role in the formation and the dynamical processes in astrophysical environments [24]. There has been extensive past studies on the thermodynamical behavior of degenerated electron gas under arbitrarily high magnetic field [25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Orbital ferromagnetism and the Chandrasekhar mass-limit

Akbari-Moghanjoughi

2012

Physics of Plasmas

View full text Add to dashboard Cite

In this paper we use quantum magnetohydrodynamic (MHD) as well as magnetohydrostatic (MHS) models for a zero-temperature Fermi-Dirac plasma to show the fundamental role of Landau orbital ferromagnetism (LOFER) on the magnetohydrostatic stability of compact stars. It is revealed that the generalized flux-conserved equation of state of form B = βρ 2s/3 only with conditions 0 ≤ s ≤ 1 and 0 ≤ β < √ 2π can leads to a stable compact stellar configuration. The distinct critical value β cr = √ 2π isshown to affect the magnetohydrostatic stability of the LOFER (s = 1) state and the magnetic field strength limit on the compact stellar configuration. Furthermore, the value of the parameter β is remarked to fundamentally alter the Chandrasekhar massradius 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 superdense plasmas such as white dwarfs.

show abstract

Section: Introductionmentioning

confidence: 99%

Orbital ferromagnetism and the Chandrasekhar mass-limit

Akbari-Moghanjoughi

2012

Physics of Plasmas

View full text Add to dashboard Cite

show abstract

“…One of the greatest challenges in astrophysical sciences is to understand puzzling presence and possible role of magnetism in stellar birth [7,8] collapse, [9], evolution [10,11] and physical processes such as gamma-ray bursts [12,13]. There have been reports of whitedwarfs and neutron stars with associated ultra-high magnetic fields [14,15].…”

Section: Introductionmentioning

confidence: 99%

Coulomb Stability-Shatter: Consequences for Compact-Stars

Akbari-Moghanjoughi¹

2012

Preprint

View full text Add to dashboard Cite

In this research the transverse hydrostatic stability of a gravitating Fermi-Dirac plasma under a quantizing field is explored. It is revealed that such plasma is magnetically unstable due to the Landau electron spin-orbit quantization in all magnetic levels which might explain the gravitational compactification in the case of magnetic compact-stars. It is also revealed that the Coulomb interaction plays a fundamental role in the magnetic instability when a critical field is reached for a given plasma composition. It is remarked that, the Coulomb interaction, on specific condition depending on the field-strength and plasma composition, can suddenly destroy the transverse stability of the relativistically degenerate Fermi-Dirac plasma. The consequences of such instability on mass-limit of magnetic compact-stars and the neutron star crust with possible relation to gamma-ray bursts is numerically examined.

show abstract

“…One of the greatest challenges in astrophysics is to understand the mysterious origin of high magnetic field and unique physical processes in many compact stars. There has been spectacular breakthroughs in this area of science in the past several years since the pioneering works of Chandrasekhar, Bohm, Canuto, Chiu and O'Connell et.al [1][2][3][4][5] on relativistic degeneracy and magnetism. We have already observed manu peculiar properties that arise due to Pauli exclusion and electron degeneracy in ordinary metallic and semiconductor materials such as quantum tunneling, Landau quantization, De Haas-van Alphen effect and many others [6,7].…”

Section: Introductionmentioning

confidence: 99%

Orbital ferromagnetism and quantum collapse in stellar plasmas

Akbari-Moghanjoughi

2011

Physics of Plasmas

View full text Add to dashboard Cite

The possibility of quantum collapse and characteristics of nonlinear localized excitations are examined in dense stars with Landau orbital ferromagnetism in the framework of conventional quantum magnetohydrodynamics model including Bohm force and spin-orbit polarization effects. Employing the concepts of effective potential and Sagdeev pseudopotential, it is confirmed that the quantum collapse and Landau orbital ferromagnetism concepts are consistent with the magnetic field and mass-density range present in some white dwarf stars. Furthermore, the value of ferromagnetic-field found in this work is about the same order of magnitude as the values calculated earlier. It is revealed that the magnetosonic nonlinear propagations can behave much differently in the two distinct non-relativistic and relativistic degeneracy regimes in a ferromagnetic dense astrophysical object. Current findings should help to understand the origin of the most important mechanisms such as gravitational collapse and the high magnetic field present in many compact stars.

show abstract

From Magnetic Collapse to Gravitational Collapse: Levels of Understanding of Magnetism*†

Cited by 6 publications

References 28 publications

Orbital ferromagnetism and the Chandrasekhar mass-limit

Orbital ferromagnetism and the Chandrasekhar mass-limit

Coulomb Stability-Shatter: Consequences for Compact-Stars

Orbital ferromagnetism and quantum collapse in stellar plasmas

Contact Info

Product

Resources

About