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

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Table 1

Data^a for PNe surveyed for OH⁺.

PN	T_⋆	Distance	Radius	H₂	X-Rays ^b	C/O^c	Morphology^d
	(10³ K)	(kpc)	(pc)

Detections
NGC 6445	170	1.39	0.14	Y	P	0.45	Mpi
NGC 6720	148	0.70	0.13	Y	N	0.62	Ecsh
NGC 6853 ^e	135	0.38	0.37	Y	P	–	Bbpih
NGC 6781	112	0.95	0.32	Y	N	1.0–1.5	Bth
NGC 7293 ^e	110	0.22	0.46	Y	P	0.87	Ltspir
Non-detections
NGC 7027 ^e	175	0.89	0.03	Y	D	2.29	Mctspih
Mz 3	107^f	1.30	0.1–0.2	N ^g	D, P	0.83	Bps
NGC 3242	89	0.81	0.13	N	D	–	Ecspaih
NGC 7009	87	1.45	0.09	N	D, P	0.32	Lbspa
NGC 7026	83 ^f	1.70	0.16	Y^h	D, P?	–	Mcbps
NGC 6826	50	1.30	0.08	N	D, P	0.87	Ecsah
NGC 40	48	1.02	0.11	Y^h	D	1.41	Bbsh
NGC 6543	48	1.50	0.09	N	D, P	0.44	Mcspa
NGC 2392	47	1.28	0.14	N	D, P	1.14	Rsai

Notes.

^(a)

Most of the data in the table are from Kastner et al. (2012) and Ueta et al. (2014), exceptions are noted;

^(b)

N = non-detection, P = point-like source, D = diffuse emission;

^(c)

carbon to oxygen ratios from Henry et al. (1999), Cohen & Barlow (2005), Pottasch & Bernard-Salas (2010), and Ueta et al. (2014);

^(d)

according to the classification scheme by Sahai et al. (2011);

^(e)

Not a HerPlaNS target, see Wesson et al. (2010) and Etxaluze et al. (2014);

^(f)

Phillips (2003);

^(g)

Smith (2003);

^(h)

Hora et al. (1999).

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