| タイトル | Heating and thermal transformation of micrometeoroids entering the earth's atmosphere |
| 著者（英） | Brownlee, D. E.; Love, S. G. |
| 著者所属（英） | Washington Univ. |
| 発行日 | 1991-01-01 |
| 言語 | eng |
| 内容記述 | The present numerical solutions for the atmospheric entry of 10 micron-1 mm diameter micrometeoroids gave attention to ablative mass loss and cooling, together with gravitational and curvature effects, for entry velocities in the 11.2-72 km/sec range. Maximum temperature and mass-loss rates are found to generally occur at altitudes between 85 and 90 km, during about 1 sec of peak heating; the survival of all particles in the 70 micron-1 mm size range is noted to be limited to those with minimal entry velocity. Virtually all of the 'cosmic spherules' of more than 70-mm diameter, as well as giant unmelted micrometeorites, are implied by the present results to be of asteroidal origin. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 91A23578 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/350346 |
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