Mathematics – Logic
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978grsa.rept..149c&link_type=abstract
In NASA. Goddard Space Flight Center Gamma Ray Spectry. in Astrophys. p 149-167 (SEE N78-31971 22-88)
Mathematics
Logic
Flare Stars, Gamma Rays, Magnetic Flux, Nuclear Radiation, Stellar Radiation, Bremsstrahlung, Nuclear Reactions, Solar Flares, Temperature Distribution, White Dwarf Stars
Scientific paper
Solar flare observations are consistent with the phenomenological description that a loop of magnetic flux is convected to the surface of the star and twisted. The resulting inductive current parallel to the field is dissipated at an enhanced rate throughout the field volume by current limiting instabilities. The steady state balance between joule heating and thermal conduction along the field lines of force to the denser, cooler surface establishes a temperature distribution. The expansion of heated and ionized surface layers leads to a pressure balance and hence predictable density and X-ray emission measure. The current limitation instabilities result observationally in the parallel current being transferred to run-away ions that reach a kinetic energy of some finite fraction of the inductive potential drop. The nuclear excitation gamma rays produced by such a run-away ion current are calculated for a white dwarf flare.
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