A Note on Bursts of Radio Emission and High Energy ($>$20 keV) X-Rays from Solar Flares
De Jager, C. and M. R. Kundu, A Note on Bursts of Radio Emission and High Energy ($>$20 keV) X-Rays from Solar Flares, 836 (1963) (ADS)
(click on the image for a larger version)
Ancient history from 1963, a hand-drawn cartoon!
This presumably was one of the first cartoons showing what became the
"standard" thick-target model, exemplified in many cartoons of this Archive
(more elegantly, for example, in the
Kane-Donnelly cartoon, dating from
not much later.
At this time the thick-target model was already well established for
auroral particles, which also precipitate and radiate bremsstrahlung photons.
The pioneering observations of both auroral and solar thick targets were
made by J.R. Winckler of the University of Minnesota, and his students
(notably K.A. Anderson and L.E. Peterson), both of whom have solar
cartoons in this Archive.
Note please how the precipitating electrons innocently ignore any guidance from
the magnetic field, perhaps because people knew even less about it then than now.
Ancient history from 1963, a hand-drawn cartoon! This presumably was one of the first cartoons showing what became the "standard" thick-target model, exemplified in many cartoons of this Archive (more elegantly, for example, in the Kane-Donnelly cartoon, dating from not much later. At this time the thick-target model was already well established for auroral particles, which also precipitate and radiate bremsstrahlung photons. The pioneering observations of both auroral and solar thick targets were made by J.R. Winckler of the University of Minnesota, and his students (notably K.A. Anderson and L.E. Peterson), both of whom have solar cartoons in this Archive.
Note please how the precipitating electrons innocently ignore any guidance from the magnetic field, perhaps because people knew even less about it then than now.