Interstellar hydrides – that is, molecules containing a single heavy element atom with one or more hydrogen atoms – were among the first molecules detected outside the solar system. They lie at the root of interstellar chemistry, being among the first species to form in initially-atomic gas, along with molecular hydrogen and its associated ions. Because the chemical pathways leading to the formation of interstellar hydrides are relatively simple, the analysis of the observed abundances is relatively straightforward and provides key information about the environments where hydrides are found. Recent years have seen rapid progress in our understanding of interstellar hydrides, thanks largely to far-IR and submillimeter observations performed with the Herschel Space Observatory. In this review, we will discuss observations of interstellar hydrides, along with the advanced modeling approaches that have been used to interpret them, and the unique information that has thereby been obtained. 1 ar X iv :1 60 1. 02 98 5v 1 [ as tr oph .G A ] 1 2 Ja n 20 16

中文翻译：

---

星际氢化物

星际氢化物——即含有一个或多个氢原子的单个重元素原子的分子——是在太阳系外探测到的首批分子之一。它们是星际化学的根源，是最早在最初的原子气体中形成的物种之一，还有分子氢及其相关离子。由于导致星际氢化物形成的化学途径相对简单，对观测到的丰度的分析相对简单，并提供了有关发现氢化物的环境的关键信息。近年来，我们对星际氢化物的理解取得了快速进展，这主要归功于赫歇尔太空天文台进行的远红外和亚毫米观测。在这篇综述中，我们将讨论星际氢化物的观测，以及用于解释它们的高级建模方法，以及由此获得的独特信息。1 ar X iv :1 60 1. 02 98 5v 1 [as troph .GA] 1 2 Jan 20 16