Table 3
Structural parameters for the 2D model of the light distribution of NGC 253 in the Ks band.
| Component | Model | m tot | μ e | μ 0 | r e | r e | r h | r h | n |
| mag | mag arcsec-2 | mag arcsec-2 | arcsec | kpc | arcsec | kpc | |||
|
|
|||||||||
| Bulge | Sersic | 7.31 | 15.49 ± 0.05 | 9.1 ± 0.5 | 0.15 | 0.76 ± 0.01 | |||
| Bar | Sersic | 6.45 | 19.38 ± 0.05 | 81 ± 1 | 1.4 | 0.30 ± 0.01 | |||
| Inner disk | exp | 4.45 | 15.58 ± 0.05 | 173 ± 4 | 2.9 | ||||
| Outer disk | exp | 5.19 | 12.56 ± 0.07 | 92.6 ± 0.5 | 1.5 | ||||
Notes. The first column indicates the different structures in NGC 253. In Col. 2 we indicate the empirical law adopted to fit the light distribution. In Col. 3 we list the total magnitude corresponding to each component; and from Cols. 4 to 10 we list the structural parameters that characterise each empirical law (i.e. effective surface brightness μe, effective radius re and n-exponent of the Sersic law, and central surface brightness μ0 and scalelength rh for the exponential law).
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