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Table 1
Relevant quantities to estimate the number of ionizing photons Q0 for regions A and B.
| Region A | Region B | Equation | |
|
|
|||
| F(Hα) | (2.25 ± 0.01) × 10-15 erg s-1 cm-2 | (3.79 ± 0.01) × 10-15 erg s-1 cm-2 | − |
| Hα/Hβobs | 5.35 ± 0.005 | 3.73 ± 0.004 | − |
| E(B − V) | 0.59 ± 0.23 | 0.25 ± 0.09 |
|
| A Hα | 1.48 ± 0.58 | 0.62 ± 0.16 | AHα = (2.51 ± 0.136) × E(B − V) |
| Lobs(Hα) | 3.37 × 1036 erg s-1 | 5.68 × 1036 erg s-1 | Lobs(Hα) = F(Hα)4πd2 |
| Lintr(Hα) | 1.32 × 1037 erg s-1 | 1 × 1037 erg s-1 | Lint(Hα) = Lobs(Hα)100.4AHα |
| Q 0 | 9.6 × 1048 s-1 | 7.3 × 1048 s-1 | Q0 = 7.33 × 1011Lintr(Hα) |
Notes. The last column reports the equation used in the case of extracted quantities. The distance in the calculation of the observed Hα luminosity Lobs(Hα) is assumed to be d = 3.8 Mpc.
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