Spectral Development of a Solar X-Ray Burst Observed on OSO-7
Rept. for Jan-Apr 1972
AEROSPACE CORP EL SEGUNDO CA LAB OPERATIONS
Pagination or Media Count:
The authors have made computer fits to proportional counter soft x- ray data and scintillation counter hard x-ray data for a small hard x-ray burst at UT 0519 on November 16, 1971. The energy content of the thermal plasma increased in conjunction with a hard x-ray burst of 60-second duration which entirely preceded the 5-keV x-ray maximum. If x-rays arise by thick target bremsstrahlung, the observed suprathermal electrons have sufficient energy to heat the thermally emitting plasma. In the thin target case, the collisional energy transfer from nonthermal electrons suffices only if the power law electron spectrum is extrapolated below 10 keV or the ambient plasma density exceeds 4 x 10 to the 10th powercc.