Diffuse band extinction and polarization in core-mantle grains

Details Diffuse band extinction and polarization in core-mantle grains Diffuse band extinction and polarization in core-mantle grains

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..39...31g&link_type=abstract

(Symposium on Solid State Astrophysics, University College, Cardiff, Wales, July 9-12, 1974.) Astrophysics and Space Science, vo

Astronomy and Astrophysics

Astrophysics

5

Interstellar Extinction, Interstellar Matter, Polarization Characteristics, Absorption Spectra, Astronomical Models, Cores, Cosmic Dust, Diffuse Radiation, Grains, Ultraviolet Spectra

Scientific paper

Diffuse band shapes in both extinction and polarization are calculated for interstellar core-mantle particles for varying size distributions of mantle thickness. It is shown that no matter whether the source of the bands is in the silicate cores or the accreted icy mantles, the polarization shapes are highly asymmetric for all mantle thicknesses. The extinction-band shapes are significantly less asymmetric, although the effect is clearly present. The only apparent possibility for producing symmetric band shapes in the dust grains is in very small bare particles in interstellar space which, if they are aligned and produce the 2200-A band, must exhibit a strong polarization effect in this region.

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