Detection af H-3(+) in interstellar space
Detection af H-3(+) in interstellar space
复制标题
DOI：
10.1038/384334a0
复制
发表时间：
1996-11-28
期刊：
影响因子：
64.8
通讯作者：
Oka, T
中科院分区：
文献类型：
--
作者：
Geballe, TR;Oka, T
H-3(+)离子被广泛认为在星际化学中起着重要的作用，它启动了一系列的反应，导致了在星际介质中观察到的许多复杂分子物种的产生(1-5)。1961年首次提出H-3(+)在星际介质中的存在(6)，1980年在实验室测量了它的红外光谱(7)。但在星际空间探测它的尝试(8-11)迄今被证明是不成功的，这里我们报告在两个分子云的光谱中探测到H-3(+)吸收。虽然目前的结果不允许准确地确定H-3(+)丰度，但这些离子似乎存在足够的数量来驱动分子云中的大部分化学作用，应该很快就有可能获得更准确的测量结果，从而更好地量化离子中性反应在分子云化学演化中的作用。
THE H-3(+) ion is widely believed to play an important role in interstellar chemistry, by initiating the chains of reactions that lead to the production of many of the complex molecular species observed in the interstellar medium(1-5). The presence of H-3(+) in the interstellar medium was first suggested(6) in 1961, and its infrared spectrum was measured(7) in the laboratory in 1980. But attempts(8-11) to detect it in interstellar space have hitherto proved unsuccessful, Here we report the detection of H-3(+) absorption in the spectra of two molecular clouds. Ali-hough the present results do not permit an accurate determination of the H-3(+) abundances, these ions appear nevertheless to be present in sufficient quantities to drive much of the chemistry in molecular clouds, It should soon be possible to obtain more accurate measurements, and thus better quantify the role of ion-neutral reactions in the chemical evolution of molecular clouds.