Table 2.
Grid of input parameters used in CIGALE for the best-fit model computation.
| Parameters | Values |
|---|---|
| Star-formation history | Delayed + burst + quenching(i) |
| [[sfhdelayedbq]] | |
| τmain, e-folding time [Myr] | 1000, 3000, 5000, 10 000 |
| tgal, galaxy age [Myr] | 4500, 7000, 9500, 12 000 |
| tbq, quenching or bursting age [Myr] | 10, 20, 30, 100 |
| rSFR, ratio of the SFR after/before quenching or bursting age | 1.0, 3.16, 10.0, 20.0, 100.0, 1000.0, 1200.0 |
| Stellar population model | Bruzual & Charlot(ii) |
| [[bc03]] | |
| Initial mass function | Salpeter(iii) |
| Metallicity | 0.02 |
| Dust attenuation | Modified Calzetti(iv) |
| [[dustatt_calzleit]] | |
| E(B − V), colour excess of the young stellar population | 0.20, 0.29, 0.44, 0.66, 1.0 |
| E(B − V)old/E(B − V)young, reduction factor for E(B − V) | 0.25, 0.50, 0.75 |
| δ, power law index of the attenuation curve | −0.5, −0.25, 0.0 |
| Dust grain model | THEMIS(v) |
| [[themis]] | |
| qhac, fraction of small hydrocarbon solids | 0.02, 0.17 |
| Umin, minimum radiation field | 5, 10, 25, 50, 80 |
| α, power law index of the radiation field | 2.0 |
| γ, fraction illuminated from Umin to Umax | 0.01 |
| Active nucleus model | Skirtor(vi) |
| [[skirtor2016]] | |
| τ9.7, optical depth at 9.7 μm | 3.0, 7.0 |
| pl, torus density radial parameter | 1.0 |
| q, torus density angular parameter | 1.0 |
| oa, angle between the equatorial plan and edge of the torus [deg] | 40 |
| R, ratio of outer to inner radius | 20 |
| Mcl, fraction of total dust mass inside clumps [%] | 97 |
| i, inclination (viewing angle) [deg] | 30 (type 1), 70 (type 2) |
| AGN fraction | 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.85 |
| Extinction law of polar dust | SMC |
| E(B − V) of polar dust | 0, 0.8 |
| Polar dust temperature [K] | 100 |
| Polar dust emissivity index | 1.6 |
Notes. The combination of these parameters results in 14 515 200 models per redshift bin. With nine redshift bins used, 130 636 800 models were computed in total. The parameters in the brackets indicate the exact name of each module as it is used in CIGALE.
References: (i) Ciesla et al. (2016); (ii) Bruzual & Charlot (2003); (iii) Salpeter (1955); (iv) Calzetti et al. (2000); (v) Jones et al. (2017); (vi) Stalevski et al. (2012, 2016).
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