Recent mass ejection from AGB star W Hya

Abstract

We analyse archival ALMA (Atacama Large Millimeter/submillimeter Array) observations of two molecular line emissions, ¹²CO(3-2) and ²⁹SiO(8-7), from oxygen-rich AGB (Asymptotic Giant Branch) star W Hya. Together with results of earlier VLT observations at visible and infrared wavelengths, our results suggest a two-component picture of the morpho-kinematics of the circumstellar envelope (CSE)...