No CrossRef data available.
Published online by Cambridge University Press: 14 August 2015
We have plotted the differential polarization as a function of distance and galactic longitude for 1732 stars between galactic latitudes −5° and +5°. The data were obtained from several published sources. A fairly clearcut distinction is seen between the effects of spiral arms and inter-arm regions indicating that starlight is systematically polarized only when passing through spiral arms.