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Fig. 5

image

Contour map of the CH3OH/CH3CHO abundance ratio at 1000 yr after the start of the shock passage. The x- and y-axis are the injected abundances of methanol [4 × 10−8, 4 × 10−6] and the parent molecule of acetaldehyde, ethyl radical CH3CH2 [4 × 10−9, 4 × 10−7], respectively. The measured methanol to acetaldehyde abundance ratio of the North and SW outflows (8−20) fall in the orange band, and that of SE (38−50) in the green band; the L1157-B1 value (130−250) is covered by the blue band (Codella et al. 2020).

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