Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..34...11m&link_type=abstract
(Symposium on Solid State Astrophysics, Cardiff, Wales, July 9-12, 1974.) Astrophysics and Space Science, vol. 34, Apr. 1975, p.
Astronomy and Astrophysics
Astrophysics
1
Error Analysis, Interstellar Extinction, Light Curve, Mie Scattering, Refractivity, Absorption Cross Sections, Astronomical Models, Chemical Composition, Graphite, Interstellar Matter, Prolate Spheroids, Silicates
Scientific paper
The extinction curves for spherical particles are subject to the errors of the particle material's refractive index. Their sensitivity to these errors has been investigated and is found to be dependent upon wavelength. For graphite, significant errors are produced in the far ultraviolet part of the extinction curve; for silicates, in the near ultraviolet; while for iron the error is relatively small. The wavelength dependence of the 10 and 20 micron absorption bands of small silicate spheroids upon their shape and alignment has been studied. It is found that the bands can be displaced by about 1 micron towards longer wavelengths from their positions for corresponding spheres; a further, though small, displacement can be superimposed upon this by their subsequent alignment.
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