Radio evidence for a magnetic mirror effect on beams of subrelativistic electrons in the solar corona
New radio spectral observations of the sun are presented which reveal a magnetic mirror effect on impulsively injected beams of subrelativistic electrons in coronal arch structures. A third branch following the descending branch of some U-bursts was detected, called N-bursts. A detailed analysis of the digital time profiles shows that the duration of the beam emission regularly increased with time along the three successive branches of the N-bursts. This duration is interpreted as the dispersion of the beam along its path. This continuity strongly suggests that the three successive branches were produced by the same electron beam, demonstrating that the N-bursts actually trace reflections on magnetic mirrors near the feet of magnetic arches. Nineteen N-bursts were analyzed in detail. The information thus obtained allows a detailed probing of the magnetic mirror effect on beams of subrelativistic electrons in astrophysical conditions. 34 references.
- Research Organization:
- National Observatory, Greece; Colorado Univ., Boulder; Paris Observatoire, Meudon, France
- OSTI ID:
- 5930521
- Journal Information:
- Astrophys. J.; (United States), Vol. 319
- Country of Publication:
- United States
- Language:
- English
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TRACING ELECTRON BEAMS IN THE SUN'S CORONA WITH RADIO DYNAMIC IMAGING SPECTROSCOPY
Related Subjects
GENERAL PHYSICS
SOLAR CORONA
ELECTRON BEAMS
RADIOWAVE RADIATION
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC FIELDS
MAGNETIC MIRRORS
SOLAR RADIO BURSTS
ATMOSPHERES
BEAMS
ELECTROMAGNETIC RADIATION
LEPTON BEAMS
OPEN PLASMA DEVICES
PARTICLE BEAMS
RADIATIONS
SOLAR ACTIVITY
STELLAR ATMOSPHERES
STELLAR CORONAE
THERMONUCLEAR DEVICES
640104* - Astrophysics & Cosmology- Solar Phenomena