Abstract
The Stokes parameters of radiation propagating through a gaseous-dust medium are obtained in explicit analytical form. The dust grains are assumed to be aligned. These formulae are applicable to any type of alignment, any shape, chemical composition, and size of grain, if the grains are not very optically thick. The axis of predominant alignment is the external magnetic field or the direction of the flux of ambient gas. The important role of the Barnett effect for the rotating grain is taken into account. The formulae obtained are applied to some specific sorts of grains (anisotropic graphite flakes, silicate spheroids, etc.) and conditions in the medium (interstellar and circumstellar clouds)
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