Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...267l..47w&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 267, Apr. 1, 1983, p. L47-L51.
Astronomy and Astrophysics
Astrophysics
27
Diffuse Radiation, Far Ultraviolet Radiation, Interstellar Extinction, Interstellar Matter, Stellar Spectra, Ultraviolet Spectra, Correlation Coefficients, Iue, Spectrum Analysis, Ultraviolet Absorption
Scientific paper
IUE measurements have been obtained for the UV extinction characteristics of 20 reddened stars previously reported to have anomalously high or low A(4430)/E(B-V) ratios, in order to conduct a first statistical study of the correlations between these ratios and interstellar extinction features in the UV. A marginally significant positive correlation is noted between A(4430)/E(B-V) and the normalized strength of the 2175 A extinction jump, but no correlation is found with the total extinction at the wavelength and a marginally negative correlation is found with the extinction rise at 1250 A. The hypothesis that 4430 A diffuse absorption is produced by very small interstellar grains is not supported by the present observations.
Bohlin Ralph Charles
Stecher Theodore P.
Witt Adolf N.
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