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Table 3.

Input parameters used to fit the SEDs of Astarte and Adonis with CIGALE.

Parameter Values
Star formation history Ciesla et al. (2017)

Stellar age (i) agemain 0.8–3.2 Gyr by a bin of 0.2 Gyr
e-folding time (ii) τmain 0.8, 1, 3, 5, 8 Gyr
Age of burst/quench episode tflex 5, 10, 50, 100 Myr
SFR ratio after/before rSFR 10−2, 10−1, 0, 101, 102, 103

Stellar synthesis population (Bruzual & Charlot 2003)

Initial mass function IMF (Chabrier 2003)
Metallicity Z 0.02
Separation age 10 Myr

Dust attenuation laws

(Calzetti et al. 2000)

Colour excess of young stars E(B − V) 0.1–1 by a bin of 0.1
Reduction factor (iii) fatt 0.3, 0.5, 0.8, 1.0

(Charlot & Fall 2000), (Lo Faro et al. 2017)

V-band attenuation in the ISM 0.3–3 by a bin of 0.1
μ 0.3, 0.5, 0.8, 1
Power law slope of the ISM −0.7, –0.48
Power law slope of the BC −0.7

Dust emission model (Draine et al. 2014)

Mass fraction of PAH qPAH 1.77, 2.50, 3.19
Minimum radiation field Umin 10, 25, 30, 40
Power law slope α 2

Synchrotron emission

Far-IR/radio correlation coefficient 2.3–2.9 by a bin of 0.1
Power law slope slope αsynchrotron 0.4–0.9 by a bin of 0.1

Notes. (i) The stellar age is the age of the main stellar population. (ii) The e-folding time is the time required for the assembly of the majority of the stellar population. (iii) The reduction factor fatt is the color excess in old relative to young stars.

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