Accretion and Emission Processes in AGN: the UV-X Connection
S. Collin, A. Abrassart, B. Czerny, A. -M. Dumont, M. Mouchet
Abstract
The main characteristics of the average spectrum of radio quiet AGN in the UV and X-ray range are reviewed, and the emission mechanisms are discussed in the framework of accretion disk models, in particular the ``irradiated cold relativistic disk". It is shown that some problems arise in confronting the predictions of the model to the observations. We propose an alternative model in terms of a hot disk surrounded by a cold Compton thick medium. Finally we mention problems with remote regions of the accretion disk.
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