Spectroscopic evidence for interstellar magnesium oxide particles

Details Spectroscopic evidence for interstellar magnesium oxide particles Spectroscopic evidence for interstellar magnesium oxide particles

Jan 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...252l..25m&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 252, Jan. 1, 1982, p. L25-L27. Research supported by the Natural Sci

Astronomy and Astrophysics

Astrophysics

13

Astronomical Spectroscopy, Electromagnetic Absorption, Interstellar Extinction, Interstellar Matter, Magnesium Oxides, Spectrum Analysis, Cosmic Dust, Optical Transition, Quantitative Analysis, Recrystallization, Spectral Line Width, X Ray Diffraction

Scientific paper

Laboratory spectra of partially recrystallized MgO films have been obtained in the wavelength range 300-135 nm. A narrow spectral feature arising from an optical transition in O(2-) appears at 161 plus or minus 1 nm. This feature is superposed on a broad background due to interband transitions. The similarity of the 161 nm feature to a band seen in interstellar extinction at the same wavelength suggests that MgO may be a component of interstellar dust. A quantitative analysis shows that 10-30% of interstellar Mg is likely bound in MgO solids.

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