CH3-Terminated Carbon Chains in the GOTHAM Survey of TMC-1: Evidence of Interstellar CH3C7N
Mark A. Siebert,
Kin Long Kelvin Lee,
Anthony J. Remijan
et al.
Abstract:We report a systematic study of all known methyl carbon chains toward TMC-1 using the second data release of the GOTHAM survey, as well as a search for larger species. Using Markov-Chain Monte Carlo simulations and spectral line stacking of over 30 rotational transitions, we report statistically significant emission from methylcyanotriacetylene (CH 3 C 7 N) at a confidence level of 4.6σ, and use it to derive a column density of ∼10 11 cm −2 . We also searched for the related species, methyltetraacetylene (CH 3… Show more
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