Ultraviolet extinction and diffuse band strength correlations

Details Ultraviolet extinction and diffuse band strength correlations Ultraviolet extinction and diffuse band strength correlations

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...277..200s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 277, Feb. 1, 1984, p. 200-206.

Astronomy and Astrophysics

Astronomy

32

Diffuse Radiation, Interstellar Extinction, Spectral Bands, Ultraviolet Astronomy, B Stars, Data Correlation, Spectral Line Width

Scientific paper

Correlations between UV extinction parameters and diffuse band strengths are south, using a data base of 50 stars with recently measured extinction curves. A novel aspect of this study is that the basic dependence of most interstellar parameters on E(B-V) (or, nearly equivalently, on the total hydrogen column density) has been largely canceled out. After this cancellation, a weak correlation is found between the 4430 A diffuse band and the 2175 A extinction feature. No other correlations are found. These results support a molecular origin for the 5780 A and 6284 A bands. It is speculated that the correlation pattern found for the 4430 A band can be explained if this band originates in reactions on disordered grain surfaces.

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