ALMA Finds Fully Deuterated Methyl Cyanide in Taurus; Models Miss Its Abundance by Factor of Three
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Summary
Fully deuterated methyl cyanide (CD3CN) was detected in space for the first time by ALMA COMPASS survey toward protostar L1551 IRS5N2 in Taurus, completing the full four-rung deuterium ladder of methyl cyanide. The detection reveals no existing astrochemical model predicts its abundance -- a systematic failure also seen with fully deuterated methanol weeks earlier.
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