The Radio Ammonia Mid-Plane Survey (RAMPS)

The Radio Ammonia Mid-Plane Survey (RAMPS) is a Galactic plane molecular line survey in the 1st quadrant of the Milky Way. We perform RAMPS observations with the 100-meter Green Bank Telescope in Green Bank, West Virginia. The purpose of RAMPS is to provide a large sample of dense molecular clumps to help us better understand the formation of high-mass stars. RAMPS primarily targets the NH3(1,1)-(5,5) inversion transitions, which trace dense gas, and the H2O maser transition at 22.235 GHz, which traces sites of active star formation. The RAMPS dataset is comprised of the raw data cubes, the processed data cubes, maps of the zeroth and first moment, maps of the NH3(1,1) optical depth, the NH3 rotational temperature, the total NH3 column density, the NH3 line width, the velocity, and the filling fraction.射电氨分子银道面巡天（Radio Ammonia Mid-Plane Survey, RAMPS）是一项针对银河系第一银道坐标象限的银道面分子线巡天项目。本巡天使用位于美国西弗吉尼亚州绿岸镇的100米口径绿岸望远镜（Green Bank Telescope）开展观测工作。该巡天的科学目标是获取大样本致密分子团块，以助力我们更深入地理解大质量恒星的形成过程。RAMPS主要观测两类跃迁：一是用于示踪致密气体的氨分子(1,1)-(5,5)反演跃迁（NH₃(1,1)-(5,5)），二是用于示踪恒星形成活动区域的22.235 GHz水脉泽跃迁。RAMPS数据集包含原始数据立方体、处理后的数据立方体、零阶矩与一阶矩图、氨分子(1,1)光学深度图、氨分子转动温度图、氨分子总柱密度图、氨分子谱线宽度图、速度场图以及填充率图。