Spectra of the CO J = 3−2 emission towars W Hya. Left: emission at the two observational epochs extracted from a single beam towards the peak of the maser emission. The vertical lines denote the stellar velocity V_lsr and the expansion velocity V_inf of the envelope around W Hya (Khouri et al. 2014). Right: observations from the first epoch separated into the three observation days (30 Nov., 3 Dec., and 5 Dec. 2015) extracted at the location of the peak of the emission map of the combined days. The data were convolved to a common beam size of 30 × 21 mas.