A note on magnetized coronae
Abstract
X-ray binaries and AGN show observational evidence for magnetized hot plasmas. Despite years of data, very little is known on these coronae especially on the mechanisms responsible for their heating, and most models simply assume their existence. However, understanding its properties has now become a key issue of the AGN and microquasars modelling. Here we consider the effect of a strong vertical magnetic field on the corona AGN and X-ray binaries and show that its modeling (structure, heating) must be reconsidered. As a first step, we present one mechanism that could extract energy from the accretion disks and deposits it in the coronae: the magnetic pumping
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