WEKO3
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Spectral reflectance (0.25-2.5μm) of powdered olivines and meteorites, and their bearing on surface materials of asteroids
https://nipr.repo.nii.ac.jp/records/1227
https://nipr.repo.nii.ac.jp/records/12273d495aa6-10be-448c-83ce-9218fea17a20
名前 / ファイル | ライセンス | アクション |
---|---|---|
KJ00000011753 (2.5 MB)
|
Item type | 紀要論文(ELS) / Departmental Bulletin Paper(1) | |||||
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公開日 | 1981-12-01 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Spectral reflectance (0.25-2.5μm) of powdered olivines and meteorites, and their bearing on surface materials of asteroids | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
ページ属性 | ||||||
内容記述タイプ | Other | |||||
内容記述 | P(論文) | |||||
著者名(英) |
Miyamoto, Masamichi
× Miyamoto, Masamichi× Mito, Akihiro× Takano, Yukio× Fujii, Naoyuki |
|||||
著者所属(英) | ||||||
en | ||||||
Department of Pure and Applied Sciences, College of General Education, University of Tokyo/Department of Pure and Applied Sciences, College of General Education, University of Tokyo/Department of Pure and Applied Sciences, College of General Education, University of Tokyo/Department of Earth Sciences, Faculty of Science, Kobe University | ||||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Spectral reflectance changes with the particle size, the thickness of the sample, the species of the background materials, and effects of carbon black were examined on powdered samples of sized olivines and some meteorites in the 0.25-2.5μm wavelength region. The effects of the pulverization on the spectral changes are dependent mainly on very fine-grained materials (e.g.<46μm) in the sample. These spectral changes of meteorites are as follows : 1) The albedo increases; 2) The spectra 'redden' in the range of about 1.6-2.5μm; 3) The absorption band strengths in the region of about 0.5-1.5μm become weak and broad; 4) The reflectance near 0.4μm is raised; 5) The sharp drop-off less than 0.35μm is found. The thickness of the sample has little effect on the reflectance spectra when the sample is more than 0.2mm thick, while a very thin sample (<0.1mm) reduces spectral contrast. When the background material has low reflectivity such as some meteorites, the spectral reflectance depends almost entirely on a very thin layer of the materials on the surface. A very small amount (1-2wt%) of carbon black lowers the reflectance and depresses the details of the absorption features. Taking into consideration these results and the brecciation processes by impacts on the asteroid surface, the finer-grained C1 or C2 meteorite seems to be a better candidate for the surface material of Ceres (or Pallas) than a coarse-grained sample of this meteorite. | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00733561 | |||||
書誌情報 |
Memoirs of National Institute of Polar Research. Special issue 巻 20, p. 345-361, 発行日 1981-12 |