| タイトル | A study of the contrast of sunspots from photometric images |
| 著者（英） | Chapman, Gary A.; Beck, John G. |
| 著者所属（英） | NASA Headquarters |
| 発行日 | 1993-07-01 |
| 言語 | eng |
| 内容記述 | The thermal contrast alpha, and the umbra-penumbra A(u)/A(p) were calculated for 63 sunspots of various sizes and morphologies. Results show that values of alpha ranged from 0.1807 to 0.4266 and A(u)/A(p) ranged from 0.0089 to 0.4899. The values of thermal contrast and umbra-penumbra were compared with complexity ratings, magnetic field strength, and time factors and found to be independent of these parameters. |
| NASA分類 | SOLAR PHYSICS |
| レポートNO | 93A46362 |
| 権利 | Copyright |
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