Time Variations of the Radial Velocity of H${}_2$O Masers in the Semi-regular Variable R Crt

H. Sudou, M. Shiga, T. Omodaka +2

H${}_2$O maser emission at 22 GHz in the circumstellar envelope is one of the good tracers of detailed physics and kinematics in the mass loss process of asymptotic giant branch star…