Multi-thermal emission associated with a limb prominence following two subflares and a coronal mass ejection

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Magnetic Field Reconnection, Solar Corona, Solar Limb, Solar Prominences, Stellar Mass Ejection, Thermal Emission, Magnetic Fields, Solar Flares, Solar X-Rays, Space Plasmas, Ultraviolet Radiation

Scientific paper

Observations of a limb prominence which became activated following two small x-ray flares on 13 Aug. 1980 are presented. For the second event the structure was clearly visible in soft x-rays for over 30 minutes. The prominence was also emitting strongly at other wavelengths, and in particular the UV O V emission was seen from what appeared to be precisely the same structure as the x-rays. The brightest point in both the UV and x-rays appeared first at the opposite end of the prominence to the chromospheric flare. The highest temperature plasma was in excess of 107 K. The energization of the prominence is discussed and it is suggested that energy deposition by energetic particles could be important. It is further suggested that the particles are accelerated by reconnecting coronal magnetic fields associated with a coronal mass ejection which was in progress throughout this period.

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