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| Paper: |
The Obscuring Medium in Active Galactic Nuclei |
| Volume: |
249, The Central Kiloparsec of Starbursts and AGN: the La Palma Connection |
| Page: |
256 |
| Authors: |
Maiolino, R. |
| Abstract: |
I discuss various pieces of observational evidence for the hypothesis that the relation between dust absorption and gas absorption in AGN is different than in the ``standard'' Galactic case. This property might imply a mismatch between optical and X-ray classification of AGN in terms of their absorption. I also discuss the possible scenarios which might be responsible for the peculiar properties of dust in AGN. In particular, I will focus on the possible formation of large grains as a consequence of coagulation in low-luminosity AGN, and on grain destruction as a consequence of the strong radiation pressure in high-luminosity AGN. |
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