小行星表面有机物的红外光谱探测方法

小行星的有机物记录了太阳系早期有机物的形成发展历史,为地球早期生命前体出现的研究提供了重要依据,对于研究生命起源和演化具有重要意义.本文综合分析了小行星表面可能存在的有机物成分、种类及其赋存状态,利用红外光谱开展地面模拟实验,探讨有机物的红外光谱特征及其影响因素.结果表明,不同类型有机物的红外光谱特征与其类型、结构、温...

Infrared Spectroscopic Detection of Organic Matter on the Surface of Asteroids

The organic matter in the asteroid has recorded the formation and evolution of organic matter in the early solar system, which provides an important basis for the research on the emergence of early life precursors on Earth, and is significant for the origin and evolution of life. In this study, the composition, types and occurrence of possible organic matter in asteroids have been analyzed. The infrared spectra and influence factors of organic matter have been discussed by simulation experiments. Infrared spectra of three representative organic matter (i.e., glycine, glucose, and eicosane) at different temperatures were obtained by in-situ infrared spectroscopy measurements under temperatures ranging from  – 60°C to 30°C in vacuum. In addition, the main types of organic matter of the Murchison carbonaceous chondrite were identified using the infrared spectrometer. The results show that the infrared spectral of different organic compounds are related to the types, structures, temperatures, and pressures. The identification marks of main organic matter on the surface of the asteroids have been determined. And the preliminary parameters of infrared spectrometer for exploring organic matter in asteroids are presented.