Letter | Published:

Circular polarisation in HDE226868

Naturevolume 254pages3940 (1975) | Download Citation



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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  1. Battelle Pacific Northwest Laboratories, Richland, Washington, 99352

    •  & J. B. SWEDLUND
  2. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky, 40506

    • R. W. AVERY


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