Visible and near-infrared spectroscopic investigation of near-Earth objects at ESO: first results☆
Visible and near-infrared spectroscopic investigation of near-Earth objects at ESO: first results☆
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ESO近地天体可见光和近红外光谱研究：初步结果☆
DOI：
10.1016/j.icarus.2003.12.023
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发表时间：
2004
期刊：
影响因子：
3.2
通讯作者：
C. Barbieri
中科院分区：
文献类型：
--
作者：
M. Lazzarin;S. Marchi;M. Barucci;M. Martino;C. Barbieri
近地天体是太阳系天体中最令人感兴趣的群体之一。此外，由于这些物体也对地球构成真实的威胁，因此，充分了解其性质和组成是评价缓减技术和了解其起源和演变的必要的第一步。在过去的几年中，我们已经开始在近地天体的可见光和近红外（NIR）区域进行长期的光谱研究。观测是用拉西拉（智利）欧洲南方天文台的3.5米NTT进行的。这里提供的数据是一组24个光谱，其中14个是可见光和NIR。我们讨论了对观测到的近地天体的分类，结果是13个S型天体、1个Q型天体、2个K型天体、3个C型天体、5个Xe型天体（其中两个天体，即（3103）埃格和（4660）海卫二，已被称为E型天体）。此外，我们还讨论了它们与陨石的联系以及空间风化的可能影响。
Near-Earth objects (NEOs) represent one of the most intriguing populations of Solar System bodies. These objects appear heterogeneous in all aspects of their physical properties, like shapes, sizes, spin rates, compositions etc. Moreover, as these objects represent also a real threat to the Earth, a good knowledge of their properties and composition is the necessary first step to evaluate mitigation techniques and to understand their origin and evolution. In the last few years we have started a long-term spectroscopic investigation in the visible and near-infrared (NIR) region of near-Earth objects. The observations have been performed with the 3.5 m NTT of the European Southern Observatory of La Silla (Chile). The data presented here are a set of 24 spectra, 14 of which are both visible and NIR. We discuss the taxonomic classification of the observed NEOs, resulting in 13 S-type objects, 1 Q-type, 2 K-types, 3 C-types, 5 Xe-types (two of these, (3103) Eger and (4660) Nereus, are already known as E-types). Moreover, we discuss their links with meteorites and the possible influences of space weathering.