MULTIPLE MOVING MAGNETIC-STRUCTURES IN THE SOLAR CORONA

We report the study of moving magnetic structures inferred from the observations of a moving type IV event with multiple sources. The ejection contains at least two moving radio emitting loops with different relative inclinations. The radio loops are located above multiple Hα flare loops in an active region near the limb. We investigate the relationship between the two systems of loops. The spatial, temporal and geometrical associations between the radio emission and near surface activities suggest a scenario similar to coronal mass ejection (CME) events, although no CME observations exist for the present event. From the observed characteristics, we find that the radio emission can be interpreted as Razin suppressed optically thin gyrosynchrotron emission from nonthermal particles of energy ∼ 100, keV and density ∼ 102-105 cm-3 in a magnetic field ≤ 2 G. © 1990 Kluwer Academic Publishers.