Directionality of continuum gamma rays from solar flares

Journal Article · Mon Oct 31 23:00:00 EST 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/166897· OSTI ID:6438722

Bai, T

Using hard X-ray burst spectrometer total counts as calibration, the changes in the brightness of gamma rays above 300 keV as a function of the heliocentric angle of a flare are investigated. The normalized gamma-ray brightness, on the average, increases with the heliocentric angle; a flare at the limb is estimated to be 13 times brighter in beam gamma rays than a similar flare near the central meridian. Both pancakelike electron distributions and downward beam distributions can be adjusted to produce the deduced limb brightening. 14 references.

• Research Organization: Stanford Univ., CA (USA)
• OSTI ID: 6438722
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 334; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BRIGHTNESS
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
HARD X RADIATION
IONIZING RADIATIONS
MEASURING INSTRUMENTS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
SOLAR ACTIVITY
SOLAR FLARES
SOLAR RADIATION
SPECTROMETERS
STELLAR RADIATION
VARIATIONS
X RADIATION