Implications of the solar flare gamma-ray limb-brightening observations for particle acceleration and the flare magnetic environment. II - Numerical results for a class of loop models

Details Implications of the solar flare gamma-ray limb-brightening observations for particle acceleration and the flare magnetic environment. II - Numerical results for a class of loop models Implications of the solar flare gamma-ray limb-brightening observations for particle acceleration and the flare magnetic environment. II - Numerical results for a class of loop models

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...232..544m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 232, no. 2, June 1990, p. 544-555. Research supported by SERC.

Computer Science

Numerical Analysis

18

Coronal Loops, Gamma Rays, Limb Brightening, Particle Acceleration, Solar Flares, Solar Limb, Solar Magnetic Field, Numerical Analysis, Solar Corona, Solar Physics, Stellar Models

Scientific paper

A previous, analytical discussion of the directivity of the greather than 10 MeV continuum is extended by performing numerical calculations of the directivity expected from electrons injected, with varying degrees of anisotropy, into magnetic loops. The three-dimensional loop models employed are semicircular in the corona and strengthen according to a simple, empirical form between the base of the corona and the top of the photosphere. It is shown that the observed burst distribution, taken at face value, places useful constraints on the region of the solar atmosphere where the field increases, the amount by which the field increases between the corona and the photosphere, the radius and orientation of individual flux tubes, and the extent to which the electrons are initially 'beamed' along the field. The potential diagnostic importance of observing the flux from disk center bursts is discussed.

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