Water fountain cand. from H_2_O masers (22.235GHz)

Water fountains (WFs) are thought to be objects in the morphological evolution of the circumstellar envelopes of low- and intermediate-mass evolved stars, transitioning from...水喷流（Water fountains，WFs）被认为是低质量与中等质量演化恒星的星周包层形态演化过程中的天体，正处于从……的演化过渡阶段。