Analysis of chemical abundances in planetary nebulae with [WC] central stars - I. Line intensities and physical conditions

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Table 5

Physical conditions derived from O ii and N ii recombination lines^a.

Object	T_e(O ii) (K)	T_e(N ii) (K)	n_e(N ii) (cm^-3)	log(O⁺⁺/O⁺)

NGC 6369	–	–	–	1.90
M 3-15	–	–	–	1.56
PC 14	2900	<6300 [2500]	>100 [1300]	1.30
M 1-61	>5000 [> 10 000]	>3200^b	>600^b	1.30
He 2-86	6200	>7900 [11200]	>2000 [6300]	1.12
Hb 4	–	>4000^b	>2000^b	1.05
Cn 1-5	8500	>1500 [12000]	<6500 [1600]	0.60
Pe 1-1	10000	–	–	0.57
M 1-25	>5500 [> 10 000]	>5000^b	>600^b	0.16
NGC 5189	–	< 15 800 [7100]	< 4000 [650]	0.13
M 1-30	>6000 [> 10 000]	>15 800^b	>1000^b	−0.12
M 1-32	–	–	–	−0.27

Notes.

^(a)

The T_e and n_e values shown in the table are upper or lower limits given by the error boxes in the diagrams. Additionally, we show in brackets the values obtained without considering the uncertainties.

^(b)

Line ratios (without errors) are out of range.

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