Grain size and geometrical effects in the Eta Carinae dust shell

Details Grain size and geometrical effects in the Eta Carinae dust shell Grain size and geometrical effects in the Eta Carinae dust shell

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.222..347m&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 222, Sept. 15, 1986, p. 347-355.

Astronomy and Astrophysics

Astronomy

17

Cosmic Dust, Grain Size, Novae, Spectral Energy Distribution, Stellar Envelopes, Stellar Magnitude, Silicates, Spatial Distribution, Stellar Models

Scientific paper

An investigation of the effects of spatially varying grain size on the 8 - 13 μm feature of η Car is presented. It is found that a shell with a preponderance of large (≡1 μm) silicate grains confined to the outer regions satisfactorily predicts the elevated spectral emission observed on the red wing of the feature. However, detailed differences suggest that the grains in η Car are not the same as those in the Trapezium region, on which the opacity data were based. There is some evidence that the large grains responsible for broadening the silicate feature may be preferentially located in the form of a disc or ring lying approximately perpendicular to the line-of-sight.

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