Laboratory and astronomical discovery of cyanothioketene, NCCHCS, in the cold starless core TMC-1

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Volume 686 (June 2024)

A&A, 686 (2024) L3

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Table 3.

Column densities of H₂C_nO and H₂C_nS and their CN and CCH derivatives

[Y] ^(a)	N[Y]	N[(Y–H)+CN] ^(b)	N[(Y–H)+CCH] ^(c)
H₂CO	5.0×10¹⁴ (0)	3.5×10¹¹ (1)	1.5×10¹² (1)
H₂CS	3.7×10¹³ (1)	1.3×10¹² (1)	3.2×10¹¹ (1)
H₂CCO	1.3×10¹³ (2)	≤3.0×10¹⁰ (3)	(4)
H₂CCS	7.8×10¹¹ (5)	1.2×10¹¹ (3)	(4)
HCO	1.1×10¹² (6)	≤3×10¹⁰ (3)	1.3×10¹¹ (6)
HCS	5.5×10¹² (5)	≤3×10¹⁰ (3)	≤2.4×10¹¹ (5)

Notes.

^(a)

Molecular species denoted as [Y] (Y being HCO), HCS, H₂CO, H₂CS, H₂CCO or H₂CCS.

^(b)

Column density, in cm⁻², when one hydrogen of CH₂ (or CH) is replaced by CN. Reference for this value is between parentheses.

^(c)

Column density, in cm⁻², when one hydrogen of CH₂ (or CH) is replaced by CCH.

References. Reference for this value is between parentheses. ⁽⁰⁾Agúndez & Wakelam (2013)⁽¹⁾Cernicharo et al. (2021e)⁽²⁾Soma et al. (2018)⁽³⁾This work. ⁽⁴⁾Low dipole moment species. This work. ⁽⁵⁾Cernicharo et al. (2021d)⁽⁶⁾Cernicharo et al. (2021f).

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