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Table 2

Parameters for our spiral galaxy model, including the blackbody temperature and the bolometric luminosity of the stellar components, and the total dust mass in the dust component.

Sérsic profile Bulge

Sérsic index 3
Effective radius 1.6 kpc
Flattening parameter 0.6
Temperature 3500 K
Luminosity 3 × 1010L

Exponential disks Old stars Young stars Dust

Scale length 4 kpc 4 kpc 4 kpc
Horizontal cutoff 20 kpc 20 kpc 20 kpc
Scale height 0.35 kpc 0.2 kpc 0.2 kpc
Vertical cutoff 1.75 kpc 1 kpc 1 kpc
Number of arms 2 2 2
Pitch angle 20° 20° 20°
Radius zero-point 4 kpc 4 kpc 4 kpc
Phase zero-point 0° 20° 20°
Perturbation weight 0.25 0.75 0.75
Arm-interarm size ratio 5 5 5
Temperature 3500 K 10 000 K
Luminosity/mass 4 × 1010L 1 × 1010L 2 × 107M

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