AKARI/IRC near-infrared asteroid spectroscopic survey: AcuA-spec
AKARI/IRC near-infrared asteroid spectroscopic survey: AcuA-spec
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DOI：
10.1093/pasj/psy125
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发表时间：
2018-10
影响因子：
2.3
通讯作者：
F. Usui;S. Hasegawa;T. Ootsubo;T. Onaka
中科院分区：
文献类型：
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作者：
F. Usui;S. Hasegawa;T. Ootsubo;T. Onaka
关于太阳系中水的知识对于理解太阳系的广泛进化过程和热历史很重要。为了探索太阳系中水的存在，研究小行星上的水化矿物和/或水冰是必不可少的。这些与水有关的材料在3-微米波段(波长从2.7到3.1微米)表现出吸收特征。我们使用日本红外线卫星Akari上的红外相机(IRC)对3-微米波段的小行星进行了光谱调查。在AKARI的热任务期间，对66颗小行星进行了147次尖端观测，波长从2.5到5微米。根据这些观测，大多数C-复合体小行星在峰值波长约为2.75微米处具有明显的与水化矿物有关的吸收特征(相对于连续体)，而S复合体小行星在该波长范围内没有明显特征。目前的数据以使用阿卡里光谱观测(ACUA-SPEC)的小行星星表的形式向公众公布。
Knowledge of water in the solar system is important for understanding of a wide range of evolutionary processes and the thermal history of the solar system. To explore the existence of water in the solar system, it is indispensable to investigate hydrated minerals and/or water ice on asteroids. These water-related materials show absorption features in the 3-$\micron$ band (wavelengths from 2.7 to 3.1 $\micron$). We conducted a spectroscopic survey of asteroids in the 3-$\micron$ band using the Infrared Camera (IRC) on board the Japanese infrared satellite AKARI. In the warm mission period of AKARI, 147 pointed observations were performed for 66 asteroids in the grism mode for wavelengths from 2.5 to 5 $\micron$. According to these observations, most C-complex asteroids have clear absorption features ($> 10\%$ with respect to the continuum) related to hydrated minerals at a peak wavelength of approximately 2.75 $\micron$, while S-complex asteroids have no significant feature in this wavelength range. The present data are released to the public as the Asteroid Catalog using AKARI Spectroscopic Observations (AcuA-spec).