Radio Astronomical Studies of the Interstellar Medium

有了这笔拨款，卡尔·海勒斯博士将继续进行一项研究计划，该计划将在星际物质的标题下跨越许多子领域。拟议的研究将旨在推进我们对银河系中星际中性原子氢的形态、星际磁场的性质以及氘的宇宙丰度的理解。海尔斯博士的研究主要是通过观察原子和分子在无线电波长下的光谱线来进行的。对银河系中氢原子形态的研究可能会提供一些重要的信息，了解那些塑造星际介质结构的宇宙过程，比如超新星爆炸和恒星风。基本的磁场研究对于理解诸如恒星形成、星系晕中气体的支持以及通过各种类型的水磁波加热星际介质等星际过程具有重要意义。最后，在不同的天文地点准确测定氘的丰度是宇宙学的基础。

With this grant Dr. Carl Heiles will continue a research program which spans many subareas under the heading of interstellar matter. The proposed research will be directed toward advancing our understanding of the morphology of the interstellar neutral atomic hydrogen in the Galaxy, the nature of the interstellar magnetic field, and the cosmic abundance of deuterium. Dr. Heiles' studies are carried out primarily through observations of spectral lines of atoms and molecules at radio wavelengths. The study of the morphology of atomic hydrogen in the Galaxy may provide important information about those cosmic processes that shape the structure of the interstellar medium, such as supernova explosions and stellar winds. The basic magnetic field studies are significant for understanding such interstellar processes as star formation, the support of gas in the Galactic halo, and the heating of the interstellar medium via various types of hydromagnetic waves. Finally, a good determination of the abundance of deuterium in a variety of astronomical sites is fundamental to cosmology.