Table 8.
Metallicity and physical parameter estimates along the quasar MS.
| Object | SED | Component | Minimum χ2 | log U | Δlog U | log Z | Δlog Z | log nH | Δlog nH |
|---|---|---|---|---|---|---|---|---|---|
| [Z⊙] | [Z⊙] | [cm−3] | [cm−3] | ||||||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
| Mrk 335 | A | BC | 12.68 | −1.75 | −1.75 – −1.50 | −1.00 | −1.15 – −0.85 | 7.75 | 7.00 – 8.75 |
| Mrk 110 | A | BC | 0.67 | −0.50 | −0.75 – −0.50 | 0.30 | 0.15 – 0.45 | 8.50 | 8.50 – 8.75 |
| Mrk 509 | A | BC | 8.81 | −0.75 | −1.00 – −0.50 | 0.00 | −0.15 – 0.15 | 10.00 | 9.75 – 10.25 |
| Ark 564 | A | BC | 32.26 | −1.25 | −1.75 – −0.25 | 0.70 | 0.30 – 1.00 | 7.00 (a) | 7.00 – 10.00 |
| Mrk 478 | xA | BC | 84.01 | −0.75 | −2.75 – 0.00 | 1.70 | 1.70 – 2.30 | 9.75 | 7.00 – 10.25 |
| Ton 28 | xA | BC | 1.40 | −0.50 | −1.00 – −0.50 | 1.70 | 1.30 – 1.70 | 11.25 | 11.00 – 13.25 |
| I Zw 1 | xA | BC | 36.73 | −0.75 | −1.75 – −0.50 | 1.30 | 1.00 – 1.30 | 10.75 | 10.25 – 11.75 |
| LB 2522 | xA | BC | 1.15 | −0.75 | −1.00 – 0.00 | 1.30 | 1.00 – 2.30 | 11.75 | 11.25 – 14.00 |
| LEDA 51016 | xA | BC | 24.23 | −1.00 | −2.50 – −0.75 | 1.30 | 1.00 – 1.70 | 10.50 | 10.00 – 11.50 |
| PHL 1092 | xA | BC | 1.42 | −3.25 | −3.25 – −3.00 | 3.00 | 2.85 – 3.15 | 12.00 | 11.75 – 12.00 |
| xA | BLUE | 2.20 | −0.25 | −0.75 – −0.25 | 1.70 | 1.30 – 1.70 | 11.50 | 11.25 – 12.50 | |
| Fairall 9 | B | BC | 34.17 | −1.75 | −2.00 – −1.00 | 0.30 | −1.00 – 0.70 | 10.50 | 7.00 – 11.00 |
| B | VBC | 1.76 | −2.00 | −2.00 – −1.75 | 0.00 | −0.30 – 0.00 | 10.50 | 10.00 – 10.50 | |
| Ark 120 | B | BC | 32.26 | −1.25 | −1.75 – −1.00 | 1.00 | −0.70 – 1.30 | 11.00 | 7.00 – 11.50 |
| B | VBC | 5.38 | −2.00 | −2.25 – −1.50 | −1.30 | −1.70 – −1.00 | 9.00 | 7.00 – 9.75 | |
| NGC 3783 | B | BC | 30.96 | −1.75 | −1.75 – −1.50 | −0.30 | −1.30 – 0.00 | 9.75 | 7.00 – 10.00 |
| B | VBC | 9.67 | 0.00 | −2.00 – 0.25 | 0.30 | −1.70 – 0.30 | 7.25 | 7.00 – 11.75 |
Notes. (1) Object’s common name. (2) SED used for the computation, with A using the SED from Mathews & Ferland (1987), xA using the xA SED computed from PHL 1092, and B using the Pop. B SED. (3) Component measured. (4) Minimum χ2 associated with the object and the component. (5) Decimal logarithm of the ionization parameter, U, associated with the minimum χ2. (6) Logarithmic interval associated with the variation of the ionization parameter, U, for a confidence level of 1σ. (7) Decimal logarithm of the metallicity, Z, associated with the minimum χ2. (8) Logarithmic range associated with the variation in the metallicity, Z, for a confidence level of 1σ. If the uncertainty range were less than one interval (0.3 dex) in the Z grid, it was assumed to be half that size, i.e., ±0.15 dex. (9) Decimal logarithm of the hydrogen density, nH, associated with the minimum χ2. (10) Logarithmic interval associated with the variation in the hydrogen density, nH, for a confidence level of 1σ.
A significantly higher nH (log nH ∼ 11 [cm−3]) was obtained by removing the diagnostic ratios connected to CIII] (see text on Ark 564 in Appendix C).
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