论文标题
空间中RNA世界的前体：在星际培养基中检测（$ z $）-1,2-乙二醇，这是糖形成中的关键中间体
Precursors of the RNA-world in space: Detection of ($Z$)-1,2-ethenediol in the interstellar medium, a key intermediate in sugar formation
论文作者
论文摘要
我们在星际介质中首次介绍了（$ z $）-1,2-乙二醇，（choh）$ _ 2 $，糖醛的烯醇形式，朝着G+0.693-0.027分子云位于银河系中心的G+0.693-0.027。我们得出了（1.8 $ \ pm $ 0.1）$ \ times $ 10 $^{13} $ cm $^{ - 2} $的列密度，这转化为分子丰度相对于1.3 $ \ times $ 10 $^{ - 10} $的分子氢。甘油醛与（$ z $）之间的丰度比为1,2-乙二醇为$ \ sim $ 5.2。我们通过从hco，h $ _2 $ co，choh或ch $ _2 $ choh等前体的化学反应讨论了几种可行的编队路线。我们还建议，通过与羟基甲基（CHOH）自由基的结合，该物种可能是在星际培养基中形成甘油醛（HOCH $ _2 $ CHOHCHO）的重要前体。
We present the first detection of ($Z$)-1,2-ethenediol, (CHOH)$_2$, the enol form of glycolaldehyde, in the interstellar medium towards the G+0.693-0.027 molecular cloud located in the Galactic Center. We have derived a column density of (1.8$\pm$0.1)$\times$10$^{13}$ cm$^{-2}$, which translates into a molecular abundance with respect to molecular hydrogen of 1.3$\times$10$^{-10}$. The abundance ratio between glycolaldehyde and ($Z$)-1,2-ethenediol is $\sim$5.2. We discuss several viable formation routes through chemical reactions from precursors such as HCO, H$_2$CO, CHOH or CH$_2$CHOH. We also propose that this species might be an important precursor in the formation of glyceraldehyde (HOCH$_2$CHOHCHO) in the interstellar medium through combination with the hydroxymethylene (CHOH) radical.
