The magnesium paradigm in IRC +10216: Discovery of MgC4H+, MgC3N+, MgC6H+, and MgC5N+

Open Access

Table 1.

New series of lines in IRC +10216.

Series	B	D	Carrier	B_calc^(a)	D_calc^(a)	μ	E_up range	T_rot	N	N (neutral) ^(b)
	(MHz)	(Hz)		(MHz)	(Hz)	(D)	(K)	(K)	(10¹¹ cm⁻²)	(10¹¹ cm⁻²)
B1449	1448.5994±0.0013	63.45±1.15	MgC₄H⁺	1447.01	63.6	13.5	9.2–78.0	17.4±0.3	4.8±0.3	220±5 ^(c)
B1447	1446.9380±0.0098	91.00±23.0	MgC₃N⁺	1445.72	64.2	18.5	9.2–21.2	9.1±0.8	1.2±0.2	93±16 ^(c)
B599	598.7495±0.0011	6.13±0.43	MgC₆H⁺	598.20	6.6	18.2	20.2–49.5	21.5±1.0	2.5±0.3	200±90 ^(d)
B594	594.3176±0.0026	4.92±1.16	MgC₅N⁺	593.93	6.6	23.7	21.6–46.7	19.2±1.6	1.1±0.2	47±13 ^(d)

Notes.

^(a)

Calculated ab initio rotational and distortion constants (see Appendix B and Table B.1).

^(b)

Column density of the corresponding neutral species (MgC₄H, MgC₃N, MgC₆H, or MgC₅N).

^(c)

Cernicharo et al. (2019b).

^(d)

Pardo et al. (2021).

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