| タイトル | Ferric iron in primitive asteroids - A 0.43-micron absorption feature |
| 著者（英） | Sawyer, Scott R.; Hatch, Erin C.; Vilas, Faith; Larson, Stephen M.; Gaffey, Michael J. |
| 著者所属（英） | NASA Johnson Space Center; NASA Headquarters |
| 発行日 | 1993-04-01 |
| 言語 | eng |
| 内容記述 | A search of reflectance spectra of C- P-, D- and S-class asteroids to hunt for the Soret band near 0.4 micron that is indicative of porphyrins yielded an identification of an 0.43 micron absorption feature in 11 primitive asteroids of the C, P, and G classes and in one S-class asteroid. It is proposed that the feature is an Fe(3+) spin-forbidden transition in aqueously altered material, possibly located near 0.43 micron due to an enhancement effect similar to the mechanism operating in jarosite. The significance of the feature for the aqueous alteration history of these asteroids is addressed. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 93A35800 |
| 権利 | Copyright |
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