Detection of thioacetaldehyde (CH3CHS) in TMC-1: Sulfur-oxygen differentiation along the hydrogenation sequence

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Fig. 3.

Calculated fractional abundances of CH₃CHO and CH₃CHS, together with the abundance of C₂H₅, shown as a function of time. The horizontal dotted lines correspond to the values observed in TMC-1 adopting the column densities in Table 2 and a column density of H₂ of 10²² cm⁻² (Cernicharo & Guélin 1987).

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