Table 1.
Models and their parameter space used by X-CIGALE for the SED fitting of the colour-selected high-z sources.
| Parameter | Value | |
|---|---|---|
| Star formation history: double-exponentially decreasing (2τ-dec) model | ||
| Age of the main stellar population in Myr | 500, 1000, 3000, 5000, 7000, 9000 | |
| e-folding time of the main stellar population model in Myr, τmain | 100, 500, 1000, 3000, 5000, 9000 | |
| Age of the late burst in Gyr, ageburst | 10, 50, 100, 200, 400 | |
| fburst | 0.0, 0.1, 0.3, 0.5 | |
| τburst | 3000, 9000 | |
| Stellar population synthesis model | ||
| Single Stellar Population Library | Bruzual & Charlot (2003) | |
| Initial Mass Function | Salpeter (1955) | |
| Metallicity | 0.02 (Solar) | |
| Nebular emission | ||
| Ionization parameter (log U) | −2.0 | |
| Fraction of Lyman continuum escaping the galaxy (fesc) | 0.0 | |
| Fraction of Lyman continuum absorbed by dust (fdust) | 0.0 | |
| Line width in km s−1 | 300.0 | |
| Dust attenuation: Calzetti et al. (2000) | ||
| Colour excess of stellar continuum light for young stars E(B − V) | 0.05, 0.3, 0.5, 0.7, 0.9 | |
| Reduction factor for the E(B − V) of the old stars compared to the young ones | 0.44 | |
| Dust template: Draine et al. (2014) | ||
| Mass fraction of PAH (qpah) | 0.47, 4.58, 7.32 | |
| Minimum radiation field (Umin) | 5, 50 | |
| Powerlaw slope dU/dM propto Uα | 2.0 | |
| Fraction illuminated from Umin to Umax, γ | 0.1 | |
| AGN models from Stalevski et al. (2016) (SKIRTOR) | ||
| Average edge-on optical depth at 9.7 micron (t) | 7.0 | |
| Power-law exponent that sets radial gradient of dust density (pl) | 1.0 | |
| Index that sets dust density gradient with polar angle (q) | 1.0 | |
| Angle measured between the equatorial plan and edge of the torus (oa) | 40 | |
| Ratio of outer to inner radius, Rout/Rin | 20 | |
| Fraction of total dust mass inside clumps (Mcl) | 97% | |
| Inclination angle (i) | 30, 70 | |
| AGN fraction | 0.01, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 0.99 | |
| Extinction in polar direction, E(B − V) | 0.0, 0.8 | |
| Emissivity of the polar dust | 1.6 | |
| Temperature of the polar dust (K) | 100.0 | |
| The extinction law of polar dust | SMC | |
| Redshift values | 0.0–7.0 with a step of 0.05 | |
Notes. Edge-on, type-2 AGN have inclination i = 70 degrees and face-on, type-1 AGN have i = 30°. The extinction in polar direction, E(B − V), included in the AGN module, accounts for the possible extinction in type-1 AGN, due to polar dust. The AGN fraction is measured as the AGN emission relative to IR luminosity (1–1000 μm).
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