Discovery of the acetyl cation, CH3CO+, in space and in the laboratory

Free Access

Table 1.

Observed line parameters for CH₃CO⁺ in TMC-1.

J_u	K	ν_obs ^(a)	Δν_oc ^(b)	^(c)	Δv ^(d)	^(e)
		(MHz)	(kHz)	(mK)	(km s⁻¹)	(mK km s⁻¹)
2	0	36537.765	−3.5	39.0 ± 0.6	0.63 ± 0.01	26.1 ± 0.6
2	1	36537.014	−0.6	11.8 ± 0.6	0.60 ± 0.03	7.5 ± 0.6
4	0	73074.769	2.7	71.0 ± 3.5	0.47 ± 0.03	35.7 ± 2.0
4	1	73073.252	−6.6	25.0 ± 3.5	0.65 ± 0.11	17.2 ± 2.0
5	0	91342.732	−3.5	37.5 ± 3.0	0.46 ± 0.04	18.2 ± 1.0
5	1	91340.865	14.2	11.9 ± 3.0	0.49 ± 0.11	6.3 ± 1.0
6	0	109610.225	2.1	12.8 ± 2.8	0.45 ± 0.09	6.1 ± 1.0
6	1	109607.954	−7.3	6.6 ± 2.8	0.60 ± 0.10	4.2 ± 1.0

Notes.

^(a)

Observed frequencies (in MHz) adopting a v_LSR of 5.83 km s⁻¹ for TMC-1. The uncertainty is 10 kHz for all the lines.

^(b)

Observed minus calculated frequencies (in kHz) resulting from a fit to the observed frequencies. The J = 7−6 K = 0, 1 lines observed in L1527 have been included in the fit (see text).

^(c)

Antenna temperature (in mK).

^(d)

Linewidth at half intensity (in km s⁻¹).

^(e)

Integrated line intensity (in mK km s⁻¹).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.