Spatially extended OH+ emission from the Orion Bar and Ridge

F. F. S.  van der Tak; Z. Nagy; V. Ossenkopf; Z. Makai; J. H. Black; A. Faure; M. Gerin; E. A. Bergin

doi:10.1051/0004-6361/201322164

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Volume 560 (December 2013)

A&A, 560 (2013) A95

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Table 1

Observed lines.

Molecule/Transition		Frequency	E _up	A _ul
		GHz	K	s^-1


OH⁺	1₀–0₁F = 1/2–3/2	909.159	43.6	0.011
OH⁺	1₂–0₁F = 5/2–3/2^a	971.804	46.7	0.033
OH⁺	1₁–0₁F = 3/2–3/2	1033.119	49.6	0.018
p-H₂O⁺	1₁₀–1₀₁	607.227	59.2	0.006
o-H₂O⁺	1₁₁–0₀₀	1115.186	53.6	0.027
H₃O⁺	–	984.709	54.7	0.023
H₃O⁺	–	1655.831	79.5	0.055

Notes. The strongest hyperfine component is listed, unless otherwise noted.

^(a)

Blend with the F = 3/2 − 1/2 hyperfine component. The frequency and E_up are averages, while the A_ul is the sum.

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