Herschel Planetary Nebula Survey (HerPlaNS) - First detection of OH+ in planetary nebulae

I. Aleman; T. Ueta; D. Ladjal; K. M. Exter; J. H. Kastner; R. Montez; A. G. G. M.  Tielens; Y.-H. Chu; H. Izumiura; I. McDonald; R. Sahai; N. Siódmiak; R. Szczerba; P. A. M.  van Hoof; E. Villaver; W. Vlemmings; M. Wittkowski; A. A. Zijlstra

doi:10.1051/0004-6361/201322940

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Volume 566 (June 2014)

A&A, 566 (2014) A79

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Table 3

OH⁺ lines detected with SPIRE.

	λ₀	λ_OBS	Surface	S/N^b
	(μm)	(μm)	brightness^a

NGC 6781 – centre
OH⁺	290.20	290.20	(2.2 ± 1.0)^b	2.7
OH⁺	308.48	308.77	1.10 ± 0.09	12
OH⁺	329.77	329.95	0.24 ± 0.12	5.8
NGC 6781 – west rim
OH⁺	290.20	290.37	6.0 ± 0.9	9.2
OH⁺	308.48	308.65	0.99 ± 0.03	30
OH⁺	329.77	329.90	0.11 ± 0.10	6.4

NGC 6720 – centre
OH⁺	290.20	290.05	1.68 ± 0.20	6.9
OH⁺	308.48	308.45	2.18 ± 0.07	27
OH⁺	329.77	329.52	0.40 ± 0.06	5.9
NGC 6720 – north rim
OH⁺	290.20	290.14	3.7 ± 0.4	9.3
OH⁺	308.48	308.39	3.74 ± 0.11	28
OH⁺	329.77	329.76	1.00 ± 0.09	8.5

NGC 6445 – centre
OH⁺	290.20	290.12	(0.93 ± 0.13)	2.7
OH⁺	308.48	308.47	2.64 ± 0.09	24
OH⁺	329.77	329.64	0.91 ± 0.10	6.7
NGC 6445 – lobe
OH⁺	290.20	290.21	1.56 ± 0.13	11
OH⁺	308.48	308.49	2.40 ± 0.10	20
OH⁺	329.77	329.78	0.43 ± 0.04	10

Notes.

^(a)

Surface brightness in 10^-17 erg cm^-2 s^-1 arcsec^-2. See text for details on the measurements. Numbers in parentheses are below the 3σ detection limit. Errors obtained from the reduction process are shown.

^(b)

Signal-to-noise ratio.

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