Radio movie of an ejection from the
Sun Radio movie of an ejection from the
This movie shows a movie of an ejection event on the east limb of the Sun as seen by the Nobeyama radioheliograph in Japan with an image every 1 minute. This event has been analyzed by N. Gopalswamy ("New Perspectives on Solar Prominences", IAU Coll. 167, ASP 150, p 358). The time is shown in the upper left corner of each panel and the maximum brightness temperature of the off-limb material is shown in the upper right corner. The material in the ejection is presumably filament or prominence material, which sits elevated in the corona at a temperature of typically several thousand degrees until the event. Since the peak brightness temperature in the corona reaches 20000 K, the material must be heated as it rises. The ejected material can be traced to a height of over 600000 km, or almost a solar radius. The initial speed is about 250 km per second. The figure at the right shows the change in distance from its launching place of the leading edge of the ejection as a function of time.