The thermomagnetic instability in degenerate cores of white dwarfs

Details The thermomagnetic instability in degenerate cores of white dwarfs The thermomagnetic instability in degenerate cores of white dwarfs

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..69..259d&link_type=abstract

Astrophysics and Space Science, vol. 69, no. 2, May 1980, p. 259-267.

Astronomy and Astrophysics

Astrophysics

5

Magnetic Cores, Magnetohydrodynamic Stability, Stellar Evolution, Stellar Magnetic Fields, White Dwarf Stars, Electron Gas, Energy Transfer, Thermodynamic Equilibrium

Scientific paper

Theoretical considerations and hypotheses indicate that plasma instabilities of various kind are responsible for such stellar processes as luminosity variations, flare phenomena, mixing, etc. In the present analysis, it is shown that degenerate cores of sufficiently hot white dwarfs are susceptible to a thermodynamic instability which generates a magnetic field and excites hydrodynamic motions. The necessary conditions for the onset of this instability are identified, along with the parameters of the instability region. The characteristic time scales of the instability are assessed, and some effects of the instability are examined.

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