First detection of CF+ towards a high-mass protostar

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Table 1

Observation parameters, Gaussian fits results and LTE model results.

Line	Frequency	E_up/k	A_ij	F_eff	B_eff	Beam	V_LSR	FWHM	T_peak	Noise
	GHz	K	s^-1			arcsec	km s^-1	km s^-1	mK	mK

CF⁺(1−0)	102.587533	4.9235	4.82 × 10^-6	0.94	0.79	25.5	–4.1 ± 0.5^a	1.6 ± 0.5^a	10.5^a	2.3
CF⁺(2−1)	205.170520	14.7703	4.62 × 10^-5	0.94	0.64	11.4	–4.1^b	1.6^b	<62^c	14.7

Notes.

^(a)

Gaussian fit results;

^(b)

fixed equal to the J = 1−0 line parameters;

^(c)

upper limit. LTE modeling with a 25″ source size (beam size) and an excitation temperature of 10 K gives T_peak = 24 mK.

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