A spatially resolved study of ionized regions in galaxies at different ...
A spatially resolved study of ionized regions in galaxies at different ... A spatially resolved study of ionized regions in galaxies at different ...
70 3 • IFS of a GEHR in NGC 6946 60¡DEC (arcsec) 50 40 30 20 10 0 0 10 20 30 40 50 60 70 RA (arcsec) 60¡DEC (arcsec) 50 40 30 20 10 0 0 10 20 30 40 50 60 70 RA (arcsec) Figure 3.15: Maps in the continuum near Hα (top) and Hβ (bottom) emission lines together with the isocontours of the corresponding emission line flux overplotted. Maps are displayed in linear scale, while isocontours are in logarithmic scale. Contours are masked according to their emission line flux.
3.4. Results 71 60¡DEC (arcsec) 50 40 30 20 10 0 0 10 20 30 40 50 60 70 RA (arcsec) 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.
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70 3 • IFS <strong>of</strong> a GEHR <strong>in</strong> NGC 6946<br />
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Figure 3.15: Maps <strong>in</strong> the cont<strong>in</strong>uum near Hα (top) and Hβ (bottom) emission l<strong>in</strong>es together with<br />
the isocontours <strong>of</strong> the correspond<strong>in</strong>g emission l<strong>in</strong>e flux overplotted. Maps are displayed <strong>in</strong> l<strong>in</strong>ear scale,<br />
while isocontours are <strong>in</strong> logarithmic scale. Contours are masked accord<strong>in</strong>g to their emission l<strong>in</strong>e flux.
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