Table 4
Photometric parameters, derived by the analysis in the Ks band, which characterize the main components and substructures in NGC 253.
| Main components in NGC 253 | ||||
|
|
||||
| Length | ϵ | PA | J − Ks | |
| kpc | degree | mag | ||
|
|
||||
| Bulge | 0.6 | 0.4 | 58 | 1–2 |
| Bar | 1.7 | 0.4–0.7 | 72 | 1–1.3 |
| Inner disk | 2.9 | 0.7–0.8 | 52 | 0.8–1 |
| Outer disk | 1.5 | 0.8 | 52 | 0.3–0.8 |
|
|
||||
| Substructures in NGC 253 | ||||
|
|
||||
| Nuclear ring | 0.2 | 0.6 | 52 | 1.5–1.8 |
| Ring | 2.9 | 0.8 | 52 | 1.2 |
Notes. The first column lists the different structures in NGC 253. In the Col. 2, are the observed length, for the disk numbers refers to the scale length. In Cols. 3 and 4 are the ellipticity and PA, respectively, derived by the fit of the isophotes. In Col. 5 are the minimum and maximum values of the J − Ks color.
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