Abstract
PHOTOMETER measurements of stellar fluxes in the vacuum ultraviolet1–3 have shown that there exists a general flux deficiency below 1215 Å (Lyman-α). This observation is supported by the photographic spectra of Carruthers4, who suggests that this deficiency is not a result of line blanketing in the atmospheres of the stars studied, but is caused by absorption in some constituent of the interstellar medium. I examine here the possibility that the source of this absorption may be hydrogen atoms trapped at or near the surface of interstellar grains. The influence of a crystal environment on the Lyman-α transition of atomic hydrogen was investigated.
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DULEY, W. Hydrogen Atoms in Interstellar Grains. Nature 222, 361 (1969). https://doi.org/10.1038/222361a0
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DOI: https://doi.org/10.1038/222361a0
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