Ultraviolet extinction curves derived from IUE data

Details Ultraviolet extinction curves derived from IUE data Ultraviolet extinction curves derived from IUE data

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...246..788s&link_type=abstract

Astrophysical Journal, Part 1, vol. 246, June 15, 1981, p. 788-793.

Astronomy and Astrophysics

Astronomy

34

B Stars, Interstellar Extinction, O Stars, Stellar Spectra, Ultraviolet Astronomy, Ultraviolet Spectra, Absorption Spectra, Anomalies, Far Ultraviolet Radiation, Iue, Nebulae, Red Shift

Scientific paper

Data from the International Ultraviolet Explorer (IUE) have been used to derive extinction curves for several stars chosen because of unusual diffuse band strength or location within dense clouds. Both the strength and position of the 2200 A extinction maximum were assessed, as well as the level of extinction in the far-ultraviolet. A variety of combinations of these features were found, ranging from near or complete absence of a 2200 A bump (HD 29647), to low far-ultraviolet extinction (Rho Oph), to unusually steep, far-ultraviolet extinction (HD 169454). Anomalous extinction apparently shows up frequently in stars associated with nebulosity or dense clouds. The apparent independence of 2200 A and far-ultraviolet extinction supports earlier suggestions that these two features are created by distinct populations of grains.

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