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This article has an erratum: [https://doi.org/10.1051/0004-6361/202347174e]


Fig. 3.

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Abundances of C3, C3H+, H2CCC, and H2CCCH+ as a function of time predicted by our model (continuous lines). The horizontal colored areas represent the observations in TMC-1 assuming an uncertainty of 3 on the measurements (Cernicharo et al. 2022 for C3H+ and this work for H2CCCH+). Dashed lines: Same, but with a threefold decrease in the H2 + C3H+ and a fivefold increase in the H2CCCH+ + e rate coefficients. The vertical gray area represents the values given by the most probable chemical age for TMC-1, due to the better agreement between calculations and observations for 67 key species.

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