No CrossRef data available.
Published online by Cambridge University Press: 08 February 2017
This is a summary of the few observations available to date. Although there remain doubts concerning the reliability of most of the published results, a linear polarization of a few percent, perpendicular to the galactic plane, is indicated. Therefore, scattering of galactic light by interstellar dust appears to be the dominating source of galactic background polarization. There is a severe lack of model calculations, which would be needed for a physical interpretation of the data.