Survey of Ammonia Molecules along the Milky Way

筑波32望远镜的20 GHz观测系统在频率复盖和灵敏度方面都有了很大改进，可以同时观测六条线的氨分子。使用该系统，猎户座分子云在氨线上被观测到，结果是外部大质量恒星使这些云变暖。银河系沿线的氨气也被观测，以确定温度并阐明其加热机制。

The 20-GHz observing system of the Tsukuba 32-telescope was much improved in the frequency coverage and sensitivity to make observations of six lines of ammonia molecules simultaneously. Using the system, Orion Molecular Clouds were observed in ammonia lines, resulting that the clouds have been made warm by outside massive stars. Ammonia along the Milky Way galaxy was also surveyed to determine the temperature and make its heating mechanism clear.