Water maser features in ultracompact HII regions

In this paper we present high resolution images and spectra toward 21 H_2_O maser sources in the vicinity of ultracompact (UC) HII regions. This survey provides the basis for...本文针对超致密（ultracompact, UC）HII区附近的21个水脉泽（H₂O maser）源，提供了高分辨率图像与光谱数据。本次巡天观测为……奠定了研究基础。