Galactic Depolarization of the 21-Centimeter-Wavelength Radiation of Extragalactic Sources

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Science  30 Dec 1966:
Vol. 154, Issue 3757, pp. 1656-1658
DOI: 10.1126/science.154.3757.1656


The dependence of the degree of linear polarization of the radiation from 213 extragalactic sources on galactic coordinates was investigated at 21-centimeter wavelength. In addition to the previously known latitude effect, the depolarization of the radiation during transit through our galaxy is also a function of galactic longitude. One possible explanation is that galactic depolarization is a simple function of the distance traveled by the radiation through an extended galactic halo.