Cygnus X-1 - Discovery of variable circular polarization

Details Cygnus X-1 - Discovery of variable circular polarization Cygnus X-1 - Discovery of variable circular polarization

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...198l.101m&link_type=abstract

Astrophysical Journal, vol. 198, June 15, 1975, pt. 2, p. L101-L104. Research supported by the Battelle Memorial Institute.

Astronomy and Astrophysics

Astrophysics

9

Binary Stars, Circular Polarization, Polarization Characteristics, Ubv Spectra, Variable Stars, X Ray Sources, Astronomical Photometry, Early Stars, Interstellar Extinction, Optical Polarization, Radial Velocity, X Ray Stars

Scientific paper

HDE 226868, the optical counterpart of Cyg X-1, has been observed for circular polarization during 1974. Observations in five colors suggest that circular polarization results from an interstellar effect. Measurements of the blue polarization reveal circular polarization variations synchronous with the 5.6-d orbital period. The circular polarization variation appears to be similar to the blue intensity variation.

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