Polarisation of Thermal Emission under an Anisotropic Radiation

Details Polarisation of Thermal Emission under an Anisotropic Radiation Polarisation of Thermal Emission under an Anisotropic Radiation

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.435...37o&link_type=abstract

WORKSHOP ON ISO POLARISATION OBSERVATIONS. Eds. R.J. Laureijs & R. Siebenmorgen. ESA-SP 435, p. 37

Physics

Polarization, Interstellar Dust, Infrared, Alignment

Scientific paper

Aspherical dust grains in an anisotropic radiation field have different temperatures depending on the cross-sections projected to the radiation. The temperature difference produces polarized thermal emission even without alignment, if the observer looks at the grains from a direction different from the anisotropic radiation. When the dust grains are aligned, the anisotropic radiation makes various affects on the polarization of the thermal emission, depending on the relative angle between the anisotropy and alignment directions. This paper presents examples of the effects and demonstrates the importance of anisotropic radiation field on the polarized thermal emission.

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