Paper:	Magnetic Doppler Imaging of Ap Stars
Volume:	449, Astronomical Polarimetry 2008: Science from Small to Large Telescopes
Page:	280
Authors:	Silvester, J.; Wade, G.; Kochukhov, O.; Landstreet, J.; Bagnulo, S.
Abstract:	Historically, the magnetic field geometries of the chemically peculiar Ap stars were modelled in the context of a simple dipole field. However, with the acquisition of increasingly sophisticated diagnostic data, it has become clear that the large-scale field topologies exhibit important departures from this simple model. Recently, new high-resolution circular and linear polarization spectroscopy has even hinted at the presence of strong, small-scale field structures, which were completely unexpected based on earlier modelling. This project investigates the detailed structure of these strong fossil magnetic fields, in particular the large-scale field geometry, as well as small scale magnetic structures, by mapping the magnetic and chemical surface structure of a selected sample of Ap stars.

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