The E asteroids and the origin of the enstatite achondrites
The E asteroids and the origin of the enstatite achondrites
复制标题
E小行星和顽辉石无球粒陨石的起源
DOI：
10.1016/0016-7037(77)90208-3
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发表时间：
1977
影响因子：
5
通讯作者：
J. Williams
中科院分区：
文献类型：
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作者：
B. Zellner;M. Leake;David Morrison;J. Williams
本文总结了光学类型为E- 44尼萨、64安吉丽娜和434匈牙利的三颗已知小行星的颜色、偏振和偏振数据。E类小行星的清单基本上已经完成，其表面显然由无色、半透明、不含铁的硅酸盐组成，如斜长石、镁橄榄石或顽火辉石。它们可能被鉴定为顽火辉石无球粒陨石的来源，这与诺顿县奥辉岩的新实验室旋光法相一致。尼萨和匈牙利似乎都处于非常有利的陨石生成位置，尼萨的形状非常非球形，在动力学上与富含金属的小行星135赫塔和几个同样明显属于贫金属E型的小天体有关。这一构造暗示了一个分化母体的碎片，其中赫塔是铁核，尼萨是最大的地幔碎片。然而，相对体积并不符合简单的火成岩与岩浆岩成分的区别。
Color, polarization and albedo data are summarized for the three known minor planets of optical type E— 44 Nysa, 64 Angelina and 434 Hungaria. The inventory of E asteroids with dimensions > 50 km is shown to be essentially complete.The surfaces of the E objects evidently consist of colorless, translucent, iron-free silicates such as plagioclase, forstefite, or enstatite. Their possible identification as the source of enstatite achondrites is consistent with new laboratory polarimetry of the Norton County aubrite. Both Nysa and Hungaria seem to be rather favorably situated for the production of meteorites.Nysa has a highly non-spherical shape, and is dynamically associated with the metal-rich asteroid 135 Hertha and several small objects also apparently of the metal-depleted E type. The configuration is suggestive of the fragments of a differentiated parent body, in which Hertha originated as the iron core and Nysa as the largest surviving mantle fragment. The relative volumes, however, are not consistent with simple igneous differentiation from a chondritic composition.
DOI：
--
发表时间：
2007
期刊：
Lunar and Planetary Science Conference XXXVIII 38
影响因子：
--
作者：
原田 知明;保科 洋介;吉村 英恭;C.Okamoto
通讯作者：
C.Okamoto