H2 fluorescence and the diffuse galactic light in the vacuum ultraviolet

Details H2 fluorescence and the diffuse galactic light in the vacuum ultraviolet H2 fluorescence and the diffuse galactic light in the vacuum ultraviolet

Dec 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242l.179d&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 242, Dec. 15, 1980, p. L179-L182. Research supported by the Natural

Astronomy and Astrophysics

Astrophysics

28

Diffuse Radiation, Far Ultraviolet Radiation, Fluorescence, Galactic Radiation, Hydrogen, Interstellar Gas, Interstellar Matter, Astrophysics, Extinction, Lyman Spectra

Scientific paper

Fluorescence by molecular H2 within the Lyman and Werner bands, as well as to continuum levels of the X 1 Sigma g + state, occurs at wavelengths less than or equal to 0.18 micron. This emission is shown to be of intensity comparable to that scattered by dust over the same wavelength range in diffuse clouds. The implied increase in dust albedo in the vacuum ultraviolet is likely due to this effect. Thus the small particles responsible for VUV extinction are of conventional chemical composition, i.e., absorbing oxides, silicates, or carbons.

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