2016 年 50 巻 2 号 p. 51-66
Primitive meteorites and planetary dusts contain organic materials extremely enriched in deuterium (D) and/or 15N compared with solar materials, which have been identified as micro-sized “hotspots” in insoluble organic matter (IOM) and matrices. They are believed to have been formed in cold environment of molecular clouds and outer region of early solar nebula. The hotspots tell us important information of formation and chemical evolution of extraterrestrial organic materials and physical/chemical conditions in molecular clouds and outer region of early solar nebula. Here, current results of “hotspots” studies are reviewed.
