Probing the physics of narrow-line regions of Seyfert galaxies - I. The case of NGC 5427

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Volume 566 (June 2014)

A&A, 566 (2014) A41

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Table 2

Extracted nuclear line fluxes for NGC 5427, and the corresponding best-fit photoionisation models.

λ (Å)	Line ID	Flux	Model A	Model B	Model C	Model D

3727,9	[O ii]	2.24 ± 0.36	1.92	1.72	1.90	2.48
3868	[Ne iii]	0.97 ± 0.14	0.40	0.52	0.32	0.48
3889	H5 + He i	0.28 ± 0.04	0.26	0.31	0.26	0.29
3970	Hϵ + [[Ne iii]	0.31 ± 0.09	0.33	0.33	0.21	0.30
4101	Hδ	0.24 ± 0.04	0.26	0.26	0.26	0.26
4340	Hγ	0.47 ± 0.06	0.46	0.46	0.46	0.46
4363	[O iii]	–	0.05	0.08	0.03	0.07
4685	He ii	0.17 ± 0.03	0.14	0.18	0.14	0.17
4861	Hβ	1.00 ± 0.09	1.00	1.00	1.00	1.00
4959	[O iii]	2.27 ± 0.19	2.40	3.18	1.81	2.60
5007	[O iii]	6.87 ± 0.57	6.94	9.18	5.24	7.51
5198,200	[N i]	0.27 ± 0.05	0.10	0.17	0.07	0.05
5875	He i	0.27 ± 0.04	0.27	0.28	0.22	0.27
6300	[O i]	0.37 ± 0.03	0.70	1.10	0.53	0.56
6363	[O i]	0.15 ± 0.02	0.23	0.35	0.17	0.18
6548	[N ii]	0.97 ± 0.06	1.16	1.28	1.31	1.00
6563	Hα	3.10 ± 0.19	2.94	2.93	2.95	2.98
6584	[N ii]	3.04 ± 0.19	3.44	3.77	3.87	2.96
6717	[S ii]	0.68 ± 0.04	0.93	1.33	0.82	0.90
6731	[[S ii]	0.63 ± 0.04	0.82	1.21	0.76	0.82

Notes.Model A has M_BH = 5 × 10⁷ M_⊙, an Eddington fraction of 0.1, a hard X-ray scale factor of 0.2 and log U = −1.3, Model B has the parameters M_BH = 5 × 10⁷ M_⊙, an Eddington fraction of 0.1 and a hard X-ray scale factor of 0.25 and log U = −1.5, and Model C has M_BH = 10⁸ M_⊙, an Eddington fraction of 0.05 and a hard X-ray scale factor of 0.2 and log U = −2.0. Model D is appropriate for a κ-distribution with κ = 20, and has M_BH = 5 × 10⁷ M_⊙, an Eddington fraction of 0.1, and a hard X-ray scale factor of 0.2, log U = −1.3.

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