Table 5.
Sampled parameters of the suites of photoionization models used to produce PIM-PDFs.
| Model | NEOGAL AGN narrow-line regions. | NEOGAL star-forming galaxies. | BPASS star-forming galaxies. | |
|---|---|---|---|---|
| parameter | Power law accretion disk. | Single stars. | Single stars and binaries. | |
| Feltre et al. (2016) | Gutkin et al. (2016) | Xiao et al. (2018) | ||
| Ionization parameter | log U | −5.0, −4.5, −4.0, −3.5, −3.0, | −4.0, −3.5, −3.0, −2.5, −2.0, | −3.5 to −1.5 in steps of 0.1 dex |
| −2.5, −2.0, −1.5, −1.0 | −1.5, −1.0 | |||
| Hydrogen number density | log10(nH/cm−3) | 2.0, 3.0, 4.0 | 2.0, 3.0, 4.0 | 0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0 |
| Relative gas metallicity | Z | 0.0001, 0.0002, 0.0005, 0.001, | 0.0001, 0.0002, 0.0005, 0.001, | 1e−5, 1e−4, 0.001, 0.002, |
| (Z⊙ = 0.01524) | 0.002, 0.004, 0.006, 0.008, | 0.002, 0.004, 0.006, 0.008, | 0.003, 0.004, 0.006, 0.008, | |
| 0.014, 0.01774, 0.03, 0.04, | 0.010, 0.014, 0.017, 0.020, | 0.010, 0.014, 0.020, 0.030, | ||
| 0.05, 0.06, 0.07 | 0.030, 0.040 | 0.040 | ||
| Dust-to-metal mass ratio | ξd | 0.1, 0.3, 0.5 | 0.1, 0.3, 0.5 | N/A |
| Carbon to Oxygen ratio | (C/O)/(C/O)⊙ | N/A | 0.10, 0.14, 0.20, 0.27, 0.38, | N/A |
| (C/O)⊙ = 0.44 | 0.52, 0.72, 1.00, 1.40 | |||
| Upper mass cutoff of IMF | mup/M⊙ | N/A | 100, 300 | N/A |
| Spectrum power law index | α | −2.0, −1.7, −1.4, −1.2 | N/A | N/A |
| Stellar population age | log10(Age) [yr] | N/A | 8.0 ( ⋆ ) | 6.0 to 8.0 in steps of 0.1 dex |
Notes. The columns list the physical parameters sampled by the NEOGAL AGN narrow-line region, NEOGAL star-forming, and BPASS-based star-forming photoionization models used to infer the ‘PIM-PDFs’ (PhotoIonization Model Probability Density Functions) shown in Fig. 20 and described in Sect. 11. The sampled values for each model are listed in each of the columns. ( ⋆ )This is the effective age of the most recent episode of star formation in the NEOGAL galaxies, where the actual stellar population ages are between 0 and 10 Myr (Gutkin et al. 2016).
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