Abstract
The class of cataclysmic variables called Polars, or AM Her systems, is comprehensively reviewed. Each part of these systems, from the two underlying stars, to the accretion region and the stream, is considered in turn. New developments in our understanding of the accretion region are outlined in some detail.
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References
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Cropper, M. The polars. Space Sci Rev 54, 195–295 (1990). https://doi.org/10.1007/BF00177799
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DOI: https://doi.org/10.1007/BF00177799