The origin of X-ray emission in 3CRR sources: Hints from mid-infrared Spitzer observations

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Volume 654 (October 2021)

A&A, 654 (2021) A141

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Table 1.

3CRR sample.

Name	z	log	log L_R	log L_IR	log L_X	log λ_IR	log R_UV	Γ	α_IX	Type
			[erg s⁻¹ Hz⁻¹]	[erg s⁻¹ Hz⁻¹]	[erg s⁻¹ Hz⁻¹]
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)	(11)
3C 33	0.0595	8.7 ⁽¹⁾	30.26	30.68	25.86	−1.90	1.12	1.7 ^(a)	1.10	HEG
3C 33.1	0.181	8.6 ⁽¹⁾	31.02	31.46	25.89	−1.03	1.11	1.2 ^(b)	1.27	BLRG
3C 47	0.425	9.2 ⁽²⁾	32.65	32.09	27.29	−0.99	2.10	1.87	1.10	BLQ
3C 61.1	0.186	8.1 ⁽¹⁾	30.35	30.27	24.96	−1.71	1.62	2.0	1.21	HEG
3C 79	0.256	9.0 ⁽¹⁾	31.27	31.80	26.79	−1.09	1.02	1.77	1.14	HEG
3C 109	0.306	8.3 ⁽²⁾	32.87	32.42	27.34	0.24	1.99	1.69 ^(e)	1.16	BLRG
3C 175	0.768	9.9 ⁽²⁾	32.79	32.42	27.50	−1.37	1.91	1.52	1.12	BLQ
3C 181	1.382	9.6 ⁽²⁾	32.83	32.60	27.54	−0.89	1.78	1.72	1.15	BLQ
3C 196	0.871	9.6 ⁽²⁾	32.39	32.63	27.21	−0.85	1.30	1.67	1.24	BLQ
3C 204	1.112	9.5 ⁽²⁾	33.24	32.42	27.73	−0.96	2.37	2.15	1.07	BLQ
3C 207	0.684	8.5 ⁽²⁾	33.99	32.16	27.36	−0.23	3.38	1.59	1.09	BLQ
3C 208	1.109	9.4 ⁽²⁾	33.52	32.26	27.43	−1.03	2.81	1.63	1.10	BLQ
3C 212	1.049	9.2 ⁽²⁾	33.93	32.65	27.83	−0.43	2.82	1.85	1.10	BLQ
3C 219	0.174	9.2 ⁽¹⁾	31.61	30.89	26.03	−2.19	2.26	1.58 ^(e)	1.11	BLRG
3C 234	0.185	9.3 ⁽¹⁾	31.91	32.21	27.02	−0.97	1.24	1.53	1.18	HEG
3C 245	1.029	9.4 ⁽²⁾	34.69	32.89	27.61	−0.39	3.34	1.57	1.20	BLQ
3C 249.1	0.311	9.3 ⁽²⁾	32.32	31.92	26.82	−1.26	1.94	1.92	1.16	BLQ
3C 254	0.734	9.3 ⁽²⁾	32.65	32.25	27.21	−0.93	1.94	1.64	1.15	BLQ
3C 263	0.652	9.1 ⁽²⁾	33.42	32.51	27.22	−0.47	2.46	1.88	1.21	BLQ
3C 268.4	1.402	9.8 ⁽²⁾	33.76	32.97	27.61	−0.71	2.33	1.45	1.22	BLQ
3C 275.1	0.557	8.3 ⁽²⁾	33.18	31.77	26.31	−0.41	2.95	1.45	1.24	BLQ
3C 300	0.272	8.8 ⁽¹⁾	31.28	30.30	25.76	−2.39	2.53	1.78	1.03	HEG
3C 334	0.555	9.7 ⁽²⁾	33.11	32.41	27.09	−1.18	2.25	1.85	1.21	BLQ
3C 380	0.691	8.9 ⁽²⁾	35.17	32.58	27.65	−0.20	4.18	1.54	1.13	BLQ
3C 382	0.0578	9.3 ⁽¹⁾	31.13	30.92	26.47	−2.26	1.76	1.80 ^(h)	1.01	BLRG
3C 390.3	0.0569	8.8 ⁽¹⁾	31.35	31.00	26.49	−1.68	1.90	1.85	1.03	BLRG
3C 452	0.0811	8.8 ⁽¹⁾	31.28	30.78	26.40	−1.91	2.04	1.70 ^(j)	1.00	HEG

Notes. Col. (1): Source name. Col. (2): Redshift. Col. (3): Black hole mass. Col. (4): Radio spectral luminosity at 5 GHz. Col. (5): Mid-infrared spectral luminosity at 15 μm. Col. (6): X-ray spectral luminosity at 2 keV. Col. (7): Eddington ratio λ_IR based on mid-infrared flux. Col. (8): Radio loudness R_UV ≡ L_R/L_4400 Å. Col. (9): Photon index Γ at 2–10 keV (f_ν ∼ ν^1 − Γ). Col. (10): Mid-infrared to X-ray spectral index α_IX ≡ 0.228log[L_IR/L_X]. Col. (11): Type of objects. Here HEG, BLRG, and BLQ are the acronyms used for high-excitation radio galaxies, broad-line radio galaxies, and broad-line quasars, respectively (Buttiglione et al. 2010).

References. References for black hole mass. (1): Buttiglione et al. (2010); (2): McLure et al. (2006). References for photon index. (a): Torresi et al. (2009); (b): Massaro et al. (2010); (c): Zhou & Gu (2020); (d): Hardcastle et al. (2006); (e): Shi et al. (2005); (f): Piconcelli et al. (2008); (g): Belsole et al. (2006); (h): Sambruna et al. (2011); (i):Winter et al. (2012); (j):Evans et al. (2006).

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