论文标题
空间中HC3O+的发现：TMC-1中O含物种的化学性质
Discovery of HC3O+ in space: The chemistry of O-bearing species in TMC-1
论文作者
论文摘要
使用Yebes 40m和IRAM 30M射电望远镜，我们检测到一系列谐波常数B0 = 4460.590 +/- 0.001 MHz，而失真常数D0 = 0.511 +/- 0.005 kHz朝向冷的密度密度核心TMC-1。高级理论的从头算计算表明，最好的候选者是质子化的三碳一氧化碳HC3O+。我们已经成功地在实验室生产了该物种，并观察到其J = 2-1和3-2旋转过渡。因此，我们根据我们的观察，理论计算和实验室实验报告了空间中HC3O+的发现。我们得出了丰度n（C3O）/N（HC3O+）= 7。C3O的质子化形式的高丰度是由于中性物种的高质子亲和力引起的。建模了O含含物种的化学，并将预测与TMC-1中最突出的O含物物种的数据中的衍生丰度进行了比较。
Using the Yebes 40m and IRAM 30m radio telescopes, we detected a series of harmonically related lines with a rotational constant B0=4460.590 +/- 0.001 MHz and a distortion constant D0=0.511 +/- 0.005 kHz towards the cold dense core TMC-1. High-level-of-theory ab initio calculations indicate that the best possible candidate is protonated tricarbon monoxide, HC3O+. We have succeeded in producing this species in the laboratory and observed its J = 2-1 and 3-2 rotational transitions. Hence, we report the discovery of HC3O+ in space based on our observations, theoretical calculations, and laboratory experiments. We derive an abundance ratio N(C3O)/N(HC3O+) = 7. The high abundance of the protonated form of C3O is due to the high proton affinity of the neutral species. The chemistry of O-bearing species is modelled, and predictions are compared to the derived abundances from our data for the most prominent O-bearing species in TMC-1.
