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Astron. Astrophys. 335, 691-702 (1998) AcknowledgementsI feel grateful to Eckart Marsch because of the many ingenious and helpful discussions we had. Special thanks are due to Roland Bodmer, who had the basic idea for the vivid bathing tub analogy. Sincere thanks are due to J.-C. Hénoux for his helpful comments on this paper. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1998 Online publication: June 18, 1998 ![]() |