Table 4.
Modelled values (see text) of the different parameters used for the SED modelling with CIGALE.
Parametersa | Range of modelled values | Best-fit valuesb |
---|---|---|
Age of the main population; t1 | 12 Gyr | 12 Gyr |
Age of the last episode of star formation; t2 | 10–000 Myr | 11 ± 20 Myr |
Timescale of the main population; τ1 | 2–10 Gyr | 2.20 ± 0.06 Gyr |
Timescale of the last episode of star formation; τ2 | 10–1000 Myr | 310 ± 340 Myr |
Burst fraction; log f | −4 to −1 | −3.7 ± −3.8 |
IMF | Chabrier | Chabrier |
Metallicity; Z | 0.02, 0.05 | 0.02 |
Ionisation parameter; log U | −3 | −3 |
Reddening of populations younger than 10 Myr; E(B − V)young | 0.05–0.70 mag | 0.18 ± 0.03 |
Relative reddening of populations older than 10 Myr; E(B − V)old factor | 0.25–0.75 | 0.05 ± 0.01 |
UV bump amplitude | 0.0, 1.5, 3.0 | 0 |
Incident dust radiation field intensity power-law distribution; α | 1.0–4.0 | 3.0 |
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