Problems with the interpretation of the 220 NM interstellar feature

Details Problems with the interpretation of the 220 NM interstellar feature Problems with the interpretation of the 220 NM interstellar feature

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.128...71f&link_type=abstract

(Universitaets-Sternwarte Jena, Jena Workshop on the Role of Dust in Dense Regions of Interstellar Matter, Georgenthal, East Ger

Astronomy and Astrophysics

Astrophysics

4

Absorption Spectra, Cosmic Dust, Interstellar Extinction, Interstellar Matter, Ultraviolet Spectra, Color, Spectral Bands, Spectrum Analysis

Scientific paper

The bump in the ultraviolet part of the interstellar extinction curve provides a great challenge in the modelling of interstellar dust. Its shape can be well approximated by a classical dispersion profile with a total halfwidth of 48 nm centred at 217 nm. Apart from few slightly deviating cases the parameters of the band seem to be surprisingly constant in the solar neighbourhood. The most common interpretation of the 217 nm feature as originating from small graphite grains meets several difficulties. No final decision on the carrier can be made at present.

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