Evidence of hydrated and/or hydroxylated minerals on the surface of asteroid 4 Vesta
Evidence of hydrated and/or hydroxylated minerals on the surface of asteroid 4 Vesta
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DOI：
10.1029/2003gl018627
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发表时间：
2003-11
影响因子：
5.2
通讯作者：
S. Hasegawa;K. Murakawa;M. Ishiguro;Hidenori Nonaka;N. Takato;C. Davis;M. Ueno;T. Hiroi
中科院分区：
文献类型：
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作者：
S. Hasegawa;K. Murakawa;M. Ishiguro;Hidenori Nonaka;N. Takato;C. Davis;M. Ueno;T. Hiroi
小行星4灶神星被认为是一个分化的物体，由于其无软骨表面，内部结构完整。在本文中，我们报告了灶神星的K-L波段光谱观测。我们已经在155°和195°之间的角隅探测到了灶神星表面上大约1%水平的3 μm吸收特征的存在。这一结果表明，灶神星的这一区域存在OH和/或H2O矿物;来源可能是碳质球粒陨石撞击物或太阳风注入的碎片。灶神星被认为是最小的类地行星，探测到3 μm的吸收特征，可能会为类地行星上挥发性物质的起源提供线索。
Asteroid 4 Vesta is thought to be a differentiated object with intact internal structure due to its achondritic surface. In this paper, we report K‐L band spectroscopic observations of Vesta. We have detected the presence of a 3‐μm absorption feature at about the 1% level on the surface of Vesta at longitudes between 155° and 195°. This result indicates that OH and/or H2O‐bearing minerals are present in this region of Vesta; the sources are plausibly fragments of carbonaceous chondrite impactors or solar wind implantation. The detection of 3‐μm absorption features from Vesta, regarded as the smallest terrestrial planet, may provide clues to the origin of volatile materials on terrestrial planets.