Synthesis of Complex Organic Molecules in Soft X-Ray Irradiated Ices
Astrophy. J., 879, 21 (2019)
A. Ciaravella, A. Jiménez-Escobar, C. Cecchi-Pestellini, C. H. Huang, N. E. Sie, G. M. Muñoz Caro, and Y. J. Chen
Synthesis of Complex Organic Molecules in Soft X-Ray Irradiated Ices
透過紅外光譜和質譜的量測發現，許多複雜有機分子可經由X射線照射之水、一氧化碳，以及氨的混和冰晶中產生，如異氰酸甲酯(CH3NCO)、甲酰胺(HCONH2)和甘氨酸(C2H5NO2)。這些含氮分子皆曾在宇宙當中的原恆星、原行星盤等被觀測到，且這些物質為形成天文生物學中相當感興趣的糖和氨基酸的基礎分子。因此，X射線對於研究生命的起源是相當好的方法之一。
From the experiments of X-ray irradiated H2O:CO:NH3 ice mixtures, numerous complex organic molecules are observed on IR spectra during X-ray irradiation of H2O:CO:NH3 ice mixtures such as methyl isocyanate (CH3NCO), formamide (HCONH2), and glycine (C2H5NO2). These N-bearing molecules also detected in the region of low-mass solar type protostellar binary, protoplanetary disk, as well as hot cores, which can be the basis for astrobiological interest as sugars and amino acids. Hence, X-ray irradiation has a potential role in prebiotic chemistry.