Table B.1.
Structural parameters of the multi-component decomposition model for IC 2531 adopted from Mosenkov et al. (2016), with an originally used double-exponential dust disc or an alternative Sérsic dust disc (not used in Mosenkov et al. 2016).
| Component | Parameter | Value | Units |
|---|---|---|---|
| Superthin disc: |  |
8.0 | kpc |
| (BrokenExponentialDisk3D) |  |
3.33 | kpc |
 |
0.1 | kpc | |
| Rb | 21.41 | kpc | |
| Lst, NUV | 1.57 | 1012 L⊙ | |
| Age | 0.1 | Gyr | |
| Thin disc: |  |
8.0 | kpc |
| (BrokenExponentialDisk3D) |  |
3.33 | kpc |
 |
0.61 | kpc | |
| Rb | 21.41 | kpc | |
| Lt, H | 3.72 | 1012 L⊙ | |
| Age | 5.0 | Gyr | |
| Thick disc: |  |
24.87 | kpc |
| (ExponentialDisk3D) |  |
1.57 | kpc |
| LT, H | 2.12 | 1012 L⊙ | |
| Age | 5.0 | Gyr | |
| Bulge: | re, b | 1.86 | kpc |
| (Sérsic) | nb | 2.26 | – |
| qb | 0.85 | – | |
| Lb | 1.97 | 1012 L⊙ | |
| Age | 8.0 | Gyr | |
| Dust disc (double-exponential): | hR, d | 8.44 | kpc |
| hz, d | 0.25 | kpc | |
| Md | 4.08 | 107 M⊙ | |
| Dust disc (Sérsic model): | re, d | 14.16 | kpc |
| nd | 0.6 | – | |
| qd | 0.03 | – | |
| Md | 4.08 | 107 M⊙ |
Notes. The parameters of the Sérsic dust disc were chosen as follows: re, d = 1.678 hR, d, nd = 0.6 (similar to what we observe in real galaxies, see Sect. 4), and the intrinsic flattening qd = hR, d/hz, d. The broken exponential function includes the inner disc scalelength hR, inn, the outer disc scalelength hR, out, the break radius Rb, the disc scaleheight hz, and the total disc luminosity L in the given waveband (the 2MASS H band for all stellar components except the young stellar disc, for which the GALEX NUV band was used). The bulge is described by a Sérsic law.
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