The Effect of Grain Size and Shape on the Spectrum of Silicon Carbide

Details The Effect of Grain Size and Shape on the Spectrum of Silicon Carbide The Effect of Grain Size and Shape on the Spectrum of Silicon Carbide

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.9313a&link_type=abstract

American Astronomical Society, AAS Meeting #211, #93.13; Bulletin of the American Astronomical Society, Vol. 39, p.891

Astronomy and Astrophysics

Astronomy

Scientific paper

There is a well known 11um feature observed in the spectra of carbon stars which is attributed to silicon carbide (SiC). Many studies of this feature have been performed, but the intrinsic nature of the dust remains a mystery. This is due, in part, to the previously published SiC optical constants, which contain errors mostly incurred through splicing datasets and do not adequately represent the bulk physical properties of the cubic structure (β polytype) of SiC dominantly found around carbon stars. Using new uncompromised optical constants for β - and α -SiC, we investigate the effects of parameters on the spectrum expected from dust around carbon stars. Using a radiative transfer modeling, we show that MRN spherical grains of SiC cannot account for the observed features. We determine the combination of grains size and grain shape needed to give rise to the observed 11.3um feature.

Affiliated with

Also associated with

No associations

Rating

The Effect of Grain Size and Shape on the Spectrum of Silicon Carbide does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Effect of Grain Size and Shape on the Spectrum of Silicon Carbide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Effect of Grain Size and Shape on the Spectrum of Silicon Carbide will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1479738