Some statistical properties of Ellerman bombs |
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| Authors: | J -René Roy H Leparskas |
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| Institution: | (1) Dept. of Astronomy, University of Western Ontario, London, Ontario, Canada;(2) Sacramento Peak Observatory, Air Force Cambridge Research Laboratories, 88349 Sunspot, N.M., U.S.A.;(3) Dept. of Astronomy, University of Western Ontario, London, Ontario, Canada |
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| Abstract: | One hundred seventy-eight Ellerman bombs were identified and studied with on- and off-band H filtergrams of two active centers, one near disk center and the other near the east limb. The photographs, taken through a 1/4 Å bandpass filter, occasionally attained resolution as fine as 0.3 . The mean duration of bombs at H-2 Å was about 13 min near disk center and 11 min near the limb; these times increase slightly when we observe closer to the core of H. Eighty-six percent of the bombs in the near-limb region and 56% in the disk-center region were seen to be accompanied by ejections of dark material; the ejections were 3–30 long. The ejection length appears to be proportional to the bomb size times the bomb lifetime. |
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