Water Ice on the Satellite of Kuiper Belt Object 2003 EL61
Water Ice on the Satellite of Kuiper Belt Object 2003 EL61
复制标题
柯伊伯带天体 2003 EL61 卫星上的水冰
DOI：
10.1086/503159
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
E. Schaller
中科院分区：
文献类型：
--
作者：
K. Barkume;M. Brown;E. Schaller
我们已经获得了大型柯伊伯带天体2003EL61中最亮的卫星的近红外光谱。光谱在1.5m2.0μm处有吸收特征，表明表面有水冰存在。我们发现，这颗卫星的吸收线比柯伊伯带天体上常见的水冰特征要深得多。我们认为，不同寻常的光谱表明，这颗卫星很可能是由撞击形成的，而不是被捕获的。
We have obtained a near-infrared spectrum of the brightest satellite of the large Kuiper Belt object 2003 EL61. The spectrum has absorption features at 1.5 and 2.0 μm, indicating that water ice is present on the surface. We find that the satellite's absorption lines are much deeper than water ice features typically found on Kuiper Belt objects. We argue that the unusual spectrum indicates that the satellite was likely formed by impact and not by capture.