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Solar microbursts at meter-decameter wavelengths

Technical Report ·
OSTI ID:6932676
; ; ; ;
Microbursts are low-brightness temperature bursts observed by the Clark Lake radioheliograph. The bursts occur several times per hour during quiet Sun periods and are seen at the observing frequencies from 30 to 70 MHz. They are stationary at a given frequency, have short rise times, and durations of 2-10 s. Observations of the bursts are presented and given an interpretation in terms of plasma emmission. The burst properties suggest that they are weak type III bursts. The observations imply that energy releases on the Sun continue to be impulsive, with nonthermal electron distributions, for small releases of energy. The relation of the bursts to type III bursts and hard X-ray bursts are discussed.
Research Organization:
Maryland Univ., College Park (USA)
OSTI ID:
6932676
Report Number(s):
AD-A-176284/8/XAB; SCIENTIFIC-3
Country of Publication:
United States
Language:
English

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Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BRIGHTNESS
ELECTROMAGNETIC RADIATION
FREQUENCY RANGE
MAIN SEQUENCE STARS
MAPS
MHZ RANGE
MHZ RANGE 01-100
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
RADIOWAVE RADIATION
SOLAR ACTIVITY
SOLAR FLARES
SOLAR RADIO BURSTS
STARS
SUN