| タイトル | Type II bursts, shock waves, and coronal transients - The event of 1980 June 29, 0233 UT |
| 著者（英） | Wagner, W. J.; Dulk, G. A.; Mclean, D. J.; Gary, D. E.; Hildner, E.; House, L.; Illing, R.; Sawyer, C. |
| 著者所属（英） | National Center for Atmospheric Research|Colorado Univ.|Commonwealth Scientific and Industrial Research Organization|NASA Marshall Space Flight Center|California Inst. of Tech. |
| 発行日 | 1984-05-01 |
| 言語 | eng |
| 内容記述 | The metric Type-II solar burst event of June 29, 1980, is characterized on the basis of spatially resolved radioheliograph observations obtained at Culgoora, Australia, and visible-light observations obtained with the coronograph/polarimeter of the SMM satellite. The data are presented in images, diagrams, and graphs and discussed in detail. The Type-II emission is found to arise in the dense moving material behind the transient loops, which have sky-plane width 0.5 solar radius and line-of-sight depth 0.1-0.4 solar radius. A faint arc observed moving ahead of the transient loops at about 900 km/sec and not associated with the Type-II burst is attributed to a shock front, and the compression ratio and Alfven Mach number of the enhanced-density region are estimated as n2/n1 = 1.3-3 and M(A) = 1.2-3. The ambient material at 3 solar radii is determined to have Alfven speed 250-625 km/sec and magnetic-field strength 50-120 mG. The total mass of the event is calculated as 700 Tg; the total magnetic energy of the loops is (1.5-15) x 10 to the 29th ergs. |
| NASA分類 | SOLAR PHYSICS |
| レポートNO | 84A38958 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/397538 |
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