A spatially resolved study of ionized regions in galaxies at different ...

3.4. Results 71
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Figure 3.16: Maps in the continuum near 8500 Å together with the isocontours of Hα overplotted.
Map displayed in linear scale, while the isocontour in logarithmic scale. Contours are masked
accordingly to their emission line flux. The continuum map source comes from the (red) first pointing.
quite similar, with the four main intense knots (A, B, C and, D) well demarcated. The
brightest knot, A, has the most extended structure, with a tail pointing to the north-west.
This structure seems to be formed following the continua morphology. There are not many
differences between the continuum maps of Hα and Hβ. The peak intensity of the continuum
in knot A corresponds to the same position in both emission line maps. From the continuum
emission, it can be seen that the structure of knot A defines that of the Hα map, with a
small concentration to the west of the knot, probably being the source of the north-west tail
of this knot.
Although the rest of knots have their equivalence between their emission line maps and
continua, their maximum position are not the same. A remarkable structure is the one of
knot C, which has an elongated continuum in a south-east to north-west direction, while the
emission line morphology is egg-like (ellipsoidal). The continua structure near this knot has
associated the HK83-005 identification, but in our emission line maps it has only a little tail
that is hardly seen.
The other way around happens to knot B. Although in the emission line maps it is seen
some structure, in the continuum maps only a weak contribution is present. Knot D has a
clear correspondence between the continuum and the Hα emission.