RADIO AND X-RAY STUDIES OF A CORONAL MASS EJECTION ASSOCIATED WITH A VERY SLOW PROMINENCE ERUPTION

We report on the observations of an X-ray coronal mass ejection (CME) with its three part structure: frontal loop, coronal cavity, and the e ruptive prominence core. The prominence core was observed in microwave s, and the frontal loop was observed in X-rays. A coronal volume much larger than that occupied by the prominence seems to be affected by th e eruption. Formation of an arcade structure was also observed beneath the erupting prominence. X-ray enhancement at the arcade persisted fo r several hours similar to long decay events. At the apex of the arcad e there was a bright knot, which we interpret as the reconnection regi on from which the filament gets detached. We determined the trajectori es of the frontal loop and the prominence core and found them to have very different characteristics. The CME showed an extremely small acce leration, while the prominence had a linear motion in the beginning fo llowed by an exponential rise. However, during the several hours of si multaneous observation, the prominence did not catch up with the front al loop. We determined the evolution of the CME mass, which increased by a factor of 4 during our observations. We discuss the implications of the observations in the general context of coronal mass ejections.