Mapping the circumstellar SiO maser emission in R Leonis
Mapping the circumstellar SiO maser emission in R Leonis
Context.The study of the innermost circumstellar layers around AGB stars is crucial for understanding how these envelopes are formed and evolve. The SiO maser emission occurs at a few stellar radii from the central star, providing direct information on the stellar pulsation and on the chemical and physical properties of …