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- W3173888519 abstract "The chemical and physical evolution of starless and pre-stellar cores are of paramount importance to understanding the process of star formation. The Taurus Molecular Cloud cores TMC 1-C and TMC 1-CP share similar initial conditions and provide an excellent opportunity to understand the evolution of the pre-stellar core phase. We investigated the evolutionary stage of starless cores based on observations towards the prototypical dark cores TMC 1-C and TMC 1-CP, mapping them in the CS $3rightarrow 2$, C$^{34}$S $3rightarrow 2$, $^{13}$CS $2rightarrow 1$, DCN $1rightarrow 0$, DCN $2rightarrow 1$, DNC $1rightarrow 0$, DNC $2rightarrow 1$, DN$^{13}$C $1rightarrow 0$, DN$^{13}$C $2rightarrow 1$, N$_2$H$^+$ $1rightarrow 0$, and N$_2$D$^+$ $1rightarrow 0$ transitions. We performed a multi-transitional study of CS and its isotopologs, DCN, and DNC lines to characterize the physical and chemical properties of these cores. We studied their chemistry using the state-of-the-art gas-grain chemical code Nautilus and pseudo time-dependent models to determine their evolutionary stage. Observational diagnostics seem to indicate that TMC 1-C is in a later evolutionary stage than TMC 1-CP, with a chemical age $sim$1 Myr. TMC 1-C shows signs of being an evolved core at the onset of star formation, while TMC 1-CP appears to be in an earlier evolutionary stage due to a more recent formation or, alternatively, a collapse slowed down by a magnetic support." @default.
- W3173888519 created "2021-07-05" @default.
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- W3173888519 date "2021-07-01" @default.
- W3173888519 modified "2023-10-18" @default.
- W3173888519 title "Evolutionary view through the starless cores in Taurus: deuteration in TMC 1-C and TMC 1-CP" @default.
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- W3173888519 hasPublicationYear "2021" @default.
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