Inhibition of degeneracy by intense magnetic fields - Derivation and astrophysical application

Details Inhibition of degeneracy by intense magnetic fields - Derivation and astrophysical application Inhibition of degeneracy by intense magnetic fields - Derivation and astrophysical application

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.135...87i&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 135, no. 1, July 1987, p. 87-104.

Statistics

Computation

3

Computational Astrophysics, Cryogenic Fluids, Degeneration, Electron Gas, Magnetic Effects, Magnetic Fields, Equations Of State, Gas Density, Gas Temperature, Stellar Luminosity, Stellar Magnetic Fields, Stellar Mass

Scientific paper

Strong magnetic fields inhibit degeneracy in Fermi gases, that is, they postpone degeneracy to higher densities or lower temperatures. This principle, virtually unknown in the physical and astrophysical literature, is derived for the case of an ideal Dirac electron gas. Its possible importance in astrophysics is due to the fact that the equations of state of Fermi gases at given density and temperature can be qualitatively changed by this degeneracy-inhibition by strong fields. All astrophysical work with strong fields up to the present has used the field-free equations of state and the usual MHD approximation: permeability of about 1. An application to hypothetical degenerate stellar objects with arbitrarily strong fields is considered in order to see what effects the changed equations of state would lead to. One result is that the luminosity-temperature relation of the star is changed: the luminosity is reduced for given mass and interior temperature.

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