Table 1.
Line ratios of the four core ERQ in Z16 and of J1744+4148.
| J0834+0159 | ||||||
|---|---|---|---|---|---|---|
| CIV/CIII] | CIV/HeII | CIII]/HeII | NV/CIV | NV/HeII | NIII]/CIII] | NIV]/CIV |
| 1.7 ± 0.3 | ≳4.6 | ≳2.3 | 1.1 ± 0.4 | ≳3.3 | ≲0.51 | ≲0.25 |
| Lyα/HeII | Lyα/CIV | (SiIV+OIV])/CIV | CII/CIV | OIII]λ1663/CIV | [OIII]/Hβ | |
| ≳23 | 5.0 ± 0.2 | 0.35 ± 0.06 | ≲0.14 | ≲0.24 | 2.2 | |
| J1232+0912 | ||||||
| CIV/CIII] | CIV/HeII | CIII]/HeII | NV/CIV | NV/HeII | NIII]/CIII] | NIV]/CIV |
| 5.0 ± 0.8 | ≳6.9 | ≳1.2 | 1.7 ± 0.1 | ≳11.7 | ≲0.80 | ≲0.14 |
| Lyα/HeII | Lyα/CIV | (SiIIV+OIV])/CIV | CII/CIV | OIII]λ1663/CIV | [OIII]/Hβ | |
| ≳6.3 | 0.86 ± 0.08 | 0.59 ± 0.07 | 0.13 ± 0.03 | ≲0.13 | 2.8 | |
| J2215−0056 | ||||||
| CIV/CIII] | CIV/HeII | CIII]/HeII | NV/CIV | NV/HeII | NIII]/CIII] | NIV]/CIV |
| 1.7 ± 0.1 | ≳4.2 | ≳2.3 | 1.0 ± 0.1 | ≳3.7 | ≲0.52 | ≲0.29 |
| Lyα/HeII | Lyα/CIV | (SiIV+OIV])/CIV | CII/CIV | OIII]λ1663/CIV | [OIII]/Hβ | |
| ≳8.6 | 2.1 ± 0.3 | 0.31 ± 0.09 | ≲0.29 | ≲0.25 | 2.2 | |
| J2323−0100 | ||||||
| CIV/CIII] | CIV/HeII | CIII]/HeII | NV/CIV | NV/HeII | NIII]/CIII] | NIV]/CIV |
| 4.7 ± 0.8 | ≳5.3 | ≳1.0 | 1.9 ± 0.2 | ≳9.8 | ≲1.1 | ≲0.18 |
| Lyα/HeII | Lyα/CIV | (SiIV+OIV])/CIV | CII/CIV | OIII]λ1663/CIV | [OIII]/Hβ | |
| ≳2.4 | 0.43 ± 0.07 | 0.54 ± 0.06 | 0.09 ± 0.02 | ≲0.18 | 2.1 | |
| J1714+4148 | ||||||
| CIV/CIII] | CIV/HeII | CIII]/HeII | NV/CIV | NV/HeII | NIII]/CIII] | NIV]/CIV |
| 2.6 ± 0.3 | ≳3.24 | ≳1.2 | 1.8 ± 0.2 | ≳5.2 | ≲0.96 | ≲0.38 |
| Lyα/HeII | Lyα/CIV | (SiIV+OIV])/CIV | CII/CIV | OIII]λ1663/CIV | [OIII]/Hβ | |
| ≳3.5 | 1.1 ± 0.2 | 0.53 ± 0.05 | ≳0.35 | ≲0.32 | 1.4 ± 0.3 | |
| High-z NLRG | ||||||
| CIV/CIII] | CIV/HeII | CIII]/HeII | NV/CIV | NV/HeII | NIII]/CIII] | NIV]/CIV |
| 2.5 ± 0.1 | 1.66 ± 0.06 | 0.64 ± 0.03 | 0.36 ± 0.02 | 0.59 ± 0.04 | ≲0.1 | 0.06 ± 0.01 |
| Lyα/HeII | Lyα/CIV | (SiIV+OIV])/CIV | CII/CIV | OIII]λ1663/CIV | ||
| 10.2 ± 0.4 | 6.1 ± 0.2 | 0.19 ± 0.01 | ≲0.04 | 0.09 ± 0.01 | ||
| High-z QSO2 Group 1 | ||||||
| CIV/CIII] | CIV/HeII | CIII]/HeII | NV/CIV | NV/HeII | NIII]/CIII] | NIV]/CIV |
| 2.5 ± 0.2 | 3.44 ± 0.08 | 1.40 ± 0.12 | 0.41 ± 0.03 | 1.37 ± 0.09 | N/A | 0.17 ± 0.10 |
| Lyα/HeII | Lyα/CIV | (SiIV+OIV])/CIV | CII/CIV | OIII]λ1663/CIV | ||
| 18.9 ± 3.5 | 5.5 ± 0.9 | 0.20 ± 0.02 | N/A | N/A | ||
| CIV/CIII] | CIV/HeII | CIII]/HeII | NV/CIV | NV/HeII | NIII]/CIII] | NIV]/CIV |
| 3.1 ± 1.0 | 6.6 ± 0.4 | 2.1 ± 0.2 | 0.50 ± 0.03 | 3.3 ± 0.3 | N/A | 0.06 ± 0.01 |
| Lyα/HeII | Lyα/CIV | (SiIV+OIV])/CIV | CII/CIV | OIII]λ1663/CIV | ||
| 27.6 ± 2.0 | 4.2 ± 0.2 | 0.18 ± 0.02 | N/A | N/A | ||
| Radio-quiet QSO1 | ||||||
| CIV/CIII] | CIV/HeII | CIII]/HeII | NV/CIV | NV/HeII | NIII]/CIII] | NIV]/CIV |
| 3.0 ± 0.4 | 38.0 ± 19.5 | 12.8 ± 6.8 | 0.46 ± 0.06 | 17.5 ± 8.8 | 0.016 ± 0.002 | 0.016 ± 0.003 |
| Lyα/HeII | Lyα/CIV | (SiIV+OIV])/CIV | CII/CIV | OIII]λ1663/CIV | ||
| 100.0 ± 50.0 | 2.6 ± 0.3 | 0.31 ± 0.05 | 0.026 ± 0.011 | 0.018 ± 0.016 | ||
| Radio-loud QSO1 | ||||||
| CIV/CIII] | CIV/HeII | CIII]/HeII | NV/CIV | NV/HeII | NIII]/CIII] | NIV]/CIV |
| 3.94 ± 0.06 | 43.7 ± 1.8 | 11.1 ± 0.5 | 0.42 ± 0.01 | 18.5 ± 0.9 | 0.038 ± 0.002 | 0.054 ± 0.002 |
| Lyα/HeII | Lyα/CIV | (SiIV+OIV])/CIV | CII/CIV | OIII]λ1663/CIV | ||
| 84.0 ± 3.6 | 1.92 ± 0.02 | 0.17 ± 0.01 | 0.007 ± 0.001 | 0.043 ± 0.001 | ||
| N-loud quasars | ||||||
| CIV/CIII] | CIV/HeII | CIII]/HeII | NV/CIV | NV/HeII | NIII]/CIII] | NIV]/CIV |
| 3.6 | 7.7 | 1.9 | 0.95 | 6.1 | 0.56 | 0.08 |
| Lyα/HeII | Lyα/CIV | (SiIV+OIV])/CIV | CII/CIV | OIII]λ1663/CIV | ||
| N/A | N/A | N/A | N/A | 0.09 | ||
Notes. The UV line ratios have been measured using the SDSS BOSS spectra. [OIII]/Hβ taken from Perrotta et al. (2019) and our GTC-EMIR data on J1744+4148. For comparison, UV line ratios for three composite spectra of powerful AGN are also shown: the high-z narrow-line radio galaxy composite (z ∼ 2.5) from Vernet et al. (2001) and the radio-quiet and radio-loud QSO1 composites at 0.3 < z < 3.6 from Telfer et al. (2002). The median line ratios of SDSS-III BOSS QSO2 at z > 2 are also shown (Group 1, CIV/HeII < 4 and Group 2, CIV/HeII > 4, Silva et al. 2020). The bottom lines show the median values of the line ratios measured by Batra & Baldwin (2014) in 41 N-loud quasars. Everywhere, the lines are NVλ1240, HeIIλ1640, CIVλ1550, CIII]λ1909, CIIλ1335, NIV]λ1486, NIII]λ1750, (SiIV+OIV])λ1400 and [OIII]λ5007. N/A means that the values are not available.
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