First interstellar detection of OH+ | Astronomy & Astrophysics (A&A)

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Table 1:

Parameters of the observed lines of the N=1-0 transition.
$J^{\prime} \leftarrow J^{\prime\prime}$	$F^{\prime} \leftarrow F^{\prime\prime}$	Frequency	$g_{\rm l}$	$g_{\rm u}$	A
		(MHz)			( $10^{-2}~{\rm s}^{-1}$ )
0 1	1/2 1/2	909045.2	2	2	0.524
0 1	1/2 3/2	909158.8	4	2	1.048

Notes. The frequencies were taken from Bekooy et al. (1985) and the Einstein A coefficients from the Cologne Database for Molecular Spectroscopy (CDMS, Müller et al. 2005). Note that the Einstein A coefficients given by de Almeida (1990) are too high by a factor 1.5.

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