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Astron. Astrophys. 336, 823-828 (1998)

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7. Spatial distribution of the dust

In NGC 7469, dust is present also in the NLR region. We have derived the distribution in the number of dust grains over the nuclear region, from r[FORMULA] 200 pc to r[FORMULA] 400 pc of the central source of the AGN, with a temperature ranging from 900 K to 300 K (Fig. 4). We note that this number increases regularly with distance from the central source.

[FIGURE] Fig. 4. Number and density of dust grains as a function of distance from the central source

We have also computed the grain density as a function of distance from the central source (Fig. 4). Fitting this distribution by a power law, we find that the hot and warm dust grain density follows an [FORMULA] distribution.

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© European Southern Observatory (ESO) 1998

Online publication: July 27, 1998
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