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Circular polarisation in HDE226868

Abstract

MUCH effort is being expended to develop an understanding of the details of X-ray production in some astronomical sources. Accretion on to magnetic poles is the mechanism most often invoked for X-ray production in collapsed stars. Strong magnetic fields, such as those associated with collapsed objects, are capable of producing observable circular polarisation; so it is of great interest to determine whether HDE226868, the binary containing Cyg X-1, exhibits this effect.

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MICHALSKY, J., SWEDLUND, J. & AVERY, R. Circular polarisation in HDE226868. Nature 254, 39–40 (1975). https://doi.org/10.1038/254039a0

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