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Title:
FUSE Measurements of Extragalactic Interstellar Extinction
Authors:
Cartledge, S. I. B.; Clayton, G. C.; Gordon, K. D.; Bachford, B. L.; Sofia, U. J.; Wolff, M. J.
Publication:
Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE ASP Conference Series, Vol. 348, Proceedings of the Conference held 2-6 August, 2004 in Victoria, British Columbia, Canada. Edited by G. Sonneborn, H. Moos, and B-G Andersson, p.418
Publication Date:
06/2006
Origin:
ASP
Bibliographic Code:
2006ASPC..348..418C

Abstract

Observations of interstellar extinction provide a fundamental experimental basis for understanding the characteristics of dust, a primary constituent of the ISM. Interactions between dust grains and light depend in part upon the grain size relative to the wavelength of light extinguished; in particular, far-ultraviolet observations are useful for investigating the properties of small dust grains. We have acquired a sample of extragalactic sight lines that, in addition to possessing infrared, optical, and ultraviolet data, have also been observed by FUSE. Using extinction curves constructed from this sample we characterise the properties of Magellanic Cloud dust grains with special emphasis on how data at shorter wavelengths affect our current understanding of the differences and similarities between Galactic and Magellanic Cloud dust, particularly with respect to composition and size.

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