The variability of the optical polarization of 44i Boo?

Details The variability of the optical polarization of 44i Boo? The variability of the optical polarization of 44i Boo?

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997babel.155...63n&link_type=abstract

Bulletin Astronomique de Belgrade, No. 155, p. 63 - 70

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Triple Systems: Polarization, Triple Systems: Close Binaries

Scientific paper

Linear optical observational polarization of 44i Boo (HD 133640) measured with the Belgrade polarimeter in the period 1983 - 1990, is presented. The authors detected the polarization with the polarization percentage range between 0.01% and 0.19% and polarization angle with almost all values between 0 and 180 degrees. Fourier analysis of polarization percentage data fails to give clear evidences of time dependent polarisation. On the other hand, a statistical test (Pfeiffer, 1977) for Q and U Stokes parameters leads to strong time variation of parameter Q, but not of U.

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