The 2175 Å interstellar extinction feature.

Details The 2175 Å interstellar extinction feature. The 2175 Å interstellar extinction feature.

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993conph..34..317t&link_type=abstract

Contemporary Physics, Vol. 34, No. 6, p. 317 - 327

Physics

1

Scientific paper

The study of cosmic dust has become a central problem in modern astrophysics, its presence being recognized as a controlling feature in many diverse astrophysical processes. Yet, for over 20 years, a major piece of spectroscopic evidence relating to the physical nature and composition of interstellar dust has defied explanation, remaining a matter of extreme controversy, standing in the way of a full understanding of the nature of these small grains of cosmic matter. The author reviews the observational properties of the ultraviolet 2175 Å interstellar extinction feature, the constraints that these place upon its physical interpretation, and the various extinction mechanisms and carrier materials that seek to explain it. The solution to the problem of the 2175 Å feature challenges both solid-state physics and astronomy, representing a unique opportunity for collaboration between these two sciences.

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