Impulsive solar x-ray bursts

Technical Report · Mon Aug 01 04:00:00 EDT 1977

OSTI ID:5109640

Crannell, C J; Frost, K J; Maetzler, C; Ohki, K; Saba, J L

A set of 22 simple, impulsive solar flares, identified in the OSO-5 hard X-ray data, were analyzed together with coincident microwave and meterwave radio observations. The rise times and fall times of the X-ray bursts are found to be highly correlated and effectively equal, this result strongly suggesting a flare energizing mechanism that is reversible. The good time resolution available for these observations reveals that the microwave emission is influenced by an additional process, evident in the tendency of the microwave emission to peak later and decay more slowly than the symmetric X-ray bursts. Meterwave emission is observed in coincidence with the 5 events which show the strongest time correlation between the X-ray and microwave burst structure. This meterwave emission is characterized by U-burst radiation, indicating confinement of the flare source.

• Research Organization: National Aeronautics and Space Administration, Greenbelt, Md. (USA). Goddard Space Flight Center
• OSTI ID: 5109640
• Report Number(s): N-77-31062; NASA-TM-X-71379; X-684-77-202
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
HARD X RADIATION
IONIZING RADIATIONS
MICROWAVE RADIATION
PULSE RISE TIME
PULSES
RADIATIONS
RADIOWAVE RADIATION
SOLAR ACTIVITY
SOLAR FLARES
SOLAR RADIATION
SOLAR RADIO BURSTS
SOLAR RADIOWAVE RADIATION
SOLAR X-RAY BURSTS
SPECTRA
TIMING PROPERTIES
X RADIATION