Stokes parameters of radiation propagating through an aligned gaseous-dust medium

Details Stokes parameters of radiation propagating through an aligned gaseous-dust medium Stokes parameters of radiation propagating through an aligned gaseous-dust medium

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.254..369d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 254, Feb. 1, 1992, p. 369-382.

Astronomy and Astrophysics

Astronomy

1

Interstellar Matter, Radiation Transport, Radiative Transfer, Stellar Envelopes, Stokes Law Of Radiation, Supergiant Stars, Optical Polarization, Optical Thickness, Orion Constellation, Polarized Light, Stellar Magnetic Fields, Zodiacal Light

Scientific paper

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 formulas 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 formulas obtained are applied to some specific sorts of grains (anisotropic graphite flakes, silicate spheroids, etc). and conditions in the medium (interstellar and circumstellar clouds), Stokes parameters for the zodiacal light polarization are obtained. Interpretation of polarimetric observation of the light scattered by circumstellar dust around the red supergiant Alpha Orionis is presented.

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