Table 2
Overview of the parameters in our model.
| Description | Parameter | Initial guess | Range | Best fit |
| Evolved stars bulge (>100 Myr) | ||||
| Total luminosity at 3.6 μm |
|
1.53 × 109 | fixed | |
| Central radius of the Einasto profile | ac [kpc] | 1.155 | fixed | |
| Einasto structure parameter | N | 2.7 | fixed | |
| Flattening factor | q | 0.72 | fixed | |
| Evolved stars disk (>100 Myr) | ||||
| Total luminosity at 3.6 μm |
|
2.86 × 109 | fixed | |
| 2D geometry of the evolved stars | 2D image | IRAC 3.6 μma | fixed | |
| Vertical scale height | hz [pc] | 538 | fixed | |
| Young stars (100 Myr) | ||||
| Total intrinsic FUV luminosity |
|
0.93 × 109 | (0.7−1.9) × 109 | 0.96 × 109 |
| 2D geometry of the young stars | 2D image | GALEX FUVb | fixed | |
| Vertical scale height | hz [pc] | 190 | fixed | |
| Ionising stars (10 Myr) | ||||
| Total intrinsic FUV luminosity |
|
0.4 × 108 | (0.4−2.6) × 108 | 2.0 × 108 |
| 2D geometry of the ionising stars | 2D image | MIPS 24 μmc | fixed | |
| Vertical scale height | hz [pc] | 190 | fixed | |
| Interstellar Dust | ||||
| Total dust mass | Mdust [M⊙] | 4.3 × 107 | (3.2−5.4) × 107 | 4.7 × 107 |
| 2D geometry for the interstellar dust | 2D image | MAGPHYS mapd | fixed | |
| Vertical scale height | hz [pc] | 238 | fixed | |
Notes. We used an inclination angle of 77.5° to deproject the input images. Most parameters remain fixed during the SED modelling. For our 3 variable parameters we give the range of our parameter grid. A detailed description of all parameters and the initial guess values can be found in Appendix A. Luminosities are in units of bolometric solar luminosity L⊙.
The Einasto bulge was first subtracted from the image, see Sect. A.1.
The contribution from the evolved stars was first subtracted from the image, see Sect. A.2.
The contribution from the evolved stars was first subtracted from the image, see Sect. A.3.
The dust mass map derived from the pixel-by-pixel MAGPHYS energy balance SED models from Viaene et al. (2014).
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