Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...258l..45t&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 258, July 1, 1982, p. L45-L48.
Astronomy and Astrophysics
Astronomy
100
Coalescing, Coronal Loops, Solar Flares, Solar X-Rays, Computerized Simulation, Gamma Ray Astronomy, Lines Of Force, Magnetohydrodynamic Stability, Nonlinear Systems, Solar Corona
Scientific paper
In connection with recent direct observations of interconnecting coronal loops, loop coalescence is being considered as a possibly important process for solar flares and coronal X-ray brightening phenomena. In the present investigation, it is proposed that the nonlinear development of the coalescence instability of current loops provides a coherent explanation of such observations and a phenomenon reported by Forrest et al. (1982), who observed amplitude oscillations in gamma-ray emission from the impulsive phase of a solar flare. It is pointed out that the present theory also offers a quantitative and natural explanation of such known characteristics as the impulsive nature of flares, the time scale of the impulsive phase, intense heating by flares, and formation of the high-energy tail of particle distribution. A plasma configuration which is unstable against the tearing and subsequent coalescence instabilities is studied.
Brunel F.
Sakai Joe
Tajima Toshiki
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