Tentative detection of HC5NH+ in TMC-1 | Astronomy & Astrophysics (A&A)

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Table 1.

Observed line parameters for the new molecule in TMC-1.

J_u	ν_obs^(a)	ν_o − ν_c^(b)	Δv^(c)	^(d)
	(MHz)	(kHz)	(kms⁻¹)	(mK kms⁻¹)	(mK)
13	33690.975	+5.2	0.80 ± 0.05	8.2 ± 1.0	9.7
14	36282.540	−2.6	0.73 ± 0.04	8.0 ± 1.0	10.4
15	38874.102	−3.3	0.59 ± 0.05	5.9 ± 1.0	9.4
16	41465.655	−3.1	0.46 ± 0.05	4.5 ± 1.0	11.9
17	44057.202	+1.7	0.76 ± 0.09	5.1 ± 1.0	6.3
18	46648.736	+4.5	0.68 ± 0.08	5.3 ± 1.0	7.7
19	49240.242	−8.8	0.50 ± 0.10	2.7 ± 1.0	5.0

Notes.

^(a)

Observed frequencies for a v_LSR of 5.83 km s⁻¹. The uncertainty is 10 kHz for all lines, except for J = 19 − 18 for which it is 20 kHz.

^(b)

Observed minus calculated frequencies in kHz.

^(c)

Linewidth at half intensity derived by fitting a Gaussian line profile to the observed transitions (in kms⁻¹).

^(d)

Integrated line intensity in mK kms⁻¹.

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