Table 5.
Reddening-corrected line intensity ratios, normalized to Hβ, for the SF knots and the nuclear region in Mrk 900.
| Ion | Knot 1 | Knot 2 | Knot 3 | Knot 4 | Knot 5 | Knot 6 | Knot 7 | Nuc | Sum |
|---|---|---|---|---|---|---|---|---|---|
| 4340 Hγ | 0.482 ± 0.004 | 0.434 ± 0.020 | 0.589 ± 0.029 | 0.498 ± 0.042 | 0.494 ± 0.009 | 0.474 ± 0.016 | 0.485 ± 0.019 | 0.498 ± 0.011 | 0.493 ± 0.003 |
| 4363 [OIII] | 0.021 ± 0.002 | – | 0.037 ± 0.013 | – | 0.045 ± 0.012 | – | – | – | – |
| 4472 HeI | 0.038 ± 0.002 | – | – | – | 0.034 ± 0.008 | – | – | – | – |
| 4861 Hβ | 1.000 | 1.000 | 1.000 | 1.000 | 1.000 | 1.000 | 1.000 | 1.000 | 1.000 |
| 4959 [OIII] | 1.043 ± 0.006 | 0.930 ± 0.030 | 0.834 ± 0.028 | 0.751 ± 0.039 | 0.958 ± 0.014 | 0.608 ± 0.013 | 0.696 ± 0.016 | 0.825 ± 0.012 | 0.791 ± 0.003 |
| 5007 [OIII] | 3.091 ± 0.016 | 2.771 ± 0.074 | 2.534 ± 0.062 | 2.288 ± 0.088 | 2.864 ± 0.031 | 1.794 ± 0.030 | 2.047 ± 0.034 | 2.509 ± 0.030 | 2.401 ± 0.007 |
| 5875 HeI | 0.102 ± 0.002 | 0.098 ± 0.021 | 0.088 ± 0.013 | 0.093 ± 0.032 | 0.088 ± 0.006 | – | 0.085 ± 0.007 | 0.091 ± 0.007 | – |
| 6300 [OI] | 0.024 ± 0.001 | 0.070 ± 0.014 | 0.097 ± 0.009 | – | 0.050 ± 0.005 | 0.066 ± 0.008 | 0.077 ± 0.007 | 0.056 ± 0.006 | – |
| 6548 [NII] | 0.074 ± 0.001 | 0.088 ± 0.011 | 0.130 ± 0.012 | 0.137 ± 0.037 | 0.103 ± 0.004 | 0.124 ± 0.007 | 0.126 ± 0.007 | 0.118 ± 0.006 | 0.135 ± 0.002 |
| 6563 Hα | 2.870 ± 0.020 | 2.870 ± 0.104 | 2.870 ± 0.095 | 2.870 ± 0.146 | 2.870 ± 0.043 | 2.870 ± 0.060 | 2.870 ± 0.061 | 2.870 ± 0.047 | 2.870 ± 0.012 |
| 6584 [NII] | 0.226 ± 0.002 | 0.270 ± 0.015 | 0.403 ± 0.017 | 0.404 ± 0.032 | 0.337 ± 0.008 | 0.381 ± 0.012 | 0.385 ± 0.011 | 0.367 ± 0.008 | 0.361 ± 0.002 |
| 6678 HeI | 0.030 ± 0.001 | – | – | – | 0.022 ± 0.005 | – | 0.025 ± 0.007 | – | – |
| 6717 [SII] | 0.238 ± 0.003 | 0.354 ± 0.018 | 0.585 ± 0.024 | 0.541 ± 0.040 | 0.375 ± 0.008 | 0.487 ± 0.014 | 0.496 ± 0.013 | 0.438 ± 0.009 | 0.477 ± 0.002 |
| 6731 [SII] | 0.170 ± 0.002 | 0.241 ± 0.014 | 0.386 ± 0.017 | 0.369 ± 0.032 | 0.282 ± 0.006 | 0.336 ± 0.011 | 0.354 ± 0.011 | 0.324 ± 0.008 | 0.339 ± 0.002 |
| 7136 [ArIII] | 0.097 ± 0.002 | 0.083 ± 0.012 | 0.090 ± 0.011 | 0.097 ± 0.023 | 0.096 ± 0.004 | – | 0.086 ± 0.008 | 0.091 ± 0.006 | – |
| FHβ | 558 ± 13 | 30 ± 4 | 33 ± 4 | 11 ± 2 | 133 ± 65 | 41 ± 2 | 51 ± 3 | 16 ± 1 | 1997 ± 24 |
| CHβ | 0.439 ± 0.006 | 0.467 ± 0.030 | 0.434 ± 0.028 | 0.398 ± 0.042 | 0.439 ± 0.012 | 0.288 ± 0.017 | 0.317 ± 0.018 | 0.418 ± 0.014 | 0.408 ± 0.004 |
| W(Hγ)ab | 2.1 | – | 3.4 | – | 3.7 | – | 1.9 | 5.0 | 2.5 |
| W(Hβ)ab | 1.9 | 2.2 | 3.3 | – | 4.5 | 2.4 | 3.7 | 5.1 | 3.5 |
| AV | 0.945 ± 0.012 | 1.012 ± 0.065 | 0.938 ± 0.058 | 0.860 ± 0.092 | 0.948 ± 0.027 | 0.623 ± 0.038 | 0.685 ± 0.038 | 0.904 ± 0.030 | 0.882 ± 0.007 |
| E(B − V) | 0.306 ± 0.004 | 0.326 ± 0.021 | 0.302 ± 0.019 | 0.278 ± 0.029 | 0.306 ± 0.009 | 0.201 ± 0.012 | 0.221 ± 0.012 | 0.292 ± 0.009 | 0.284 ± 0.002 |
Notes. Reddening-corrected line fluxes normalized to F(Hβ) = 1. The reddening-corrected Hβ flux (in units of 10−16 erg s−1 cm−2), the interstellar extinction coefficient CHβ, and the values of the equivalent width in absorption for Hγ and Hβ (in Å) are also provided in the table. AV = 2.16 × C(Hβ) and E(B − V) = 0.697 × C(Hβ) (Dopita & Sutherland 2003).
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