The optical polarization of Epsilon Aurigae through the 1982-84 eclipse

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Auriga Constellation, Color, Eclipsing Binary Stars, Light Curve, Optical Polarization, Brightness, Iue, Pulsed Radiation, Space Observations (From Earth), Stokes Law Of Radiation, Variable Stars, Visual Observation

Scientific paper

About 350 nights observations on the 61-cm telescope at Pine Mt. Observatory were made of the variable polarization of Eps. Aurigae during 1982-85, in the U, B, and V color bands. The V data are the most complete and are shown. In terms of the overall features the curves in all three colors are quite similar. The typical errors per nightly point in the V curves are about 0.015% for either of the two normalized, equatorial Stokes parameters Q and U. Note that there is a large background or constant component of some 2.5%, position angle around 135 deg. This is presumably largely interstellar, and the intrinsic polarization probably does not much exceed the amplitude of the variable component, approx. 0.5%. A few field-star polarizations were measured but a very clear pattern was not obtained in this part of the sky.

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