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Bulgarian Journal of Physics
Print: 1310-0157 Online: 1314-2666
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RECOGNIZED BY THE EUROPEAN PHYSICAL SOCIETY 
Bulg. J. Phys. vol.27 no.S1 (2000), pp. 085-088
Morphology and Evolution of a Hα Eruptive Prominence
A. Ökten1,3, V .N. Dermendjiev2, N.I. Petrov2, T. Özışık1, H.H. Esenoglu1
1Istanbul University, Faculty of Science, Department of Astronomy and Space Sciences, Turkey
2Institute of Astronomy, Bulgarian Academy of Science, Bulgaria
3Istanbul University Observatory Research and Application Center, Turkey
go back1Istanbul University, Faculty of Science, Department of Astronomy and Space Sciences, Turkey
2Institute of Astronomy, Bulgarian Academy of Science, Bulgaria
3Istanbul University Observatory Research and Application Center, Turkey
Abstract. An eruptive prominence has been observed in Hα on 18 June 1989 at western solar limb (N10°;W90°) in time interval 08:39–09:22 UT. The eruption started as expansion of the upper part of a filament channel crossing the equator. Several arches of erupting prominence material have been registered in more than 31 frames. All the frames have been processed and analyzed by means of microdensitometer and image processing technique for study the morphology of the eruptive event.