Abstract
IT has been suggested1 that there may exist in the far ultraviolet a broad absorption band of the same type as those already known in the visible region. The postulated band centre was at 4.5 µm−1, and had a width at half-intensity of 400 Å. The profile of this band was obtained by comparing the interstellar extinction curve as determined by Stecher2 with the theoretical curve derived by Wickramasinghe3 for a graphite core–dirty ice model. The suggestion was made tentatively because of the paucity of the data. The purpose of this letter is to present further data to confirm the occurrence of an interstellar absorption band in the far ultraviolet.
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References
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NANDY, K., SEDDON, H. Further Evidence for the Occurrence of a Broad Interstellar Absorption Band in the Far Ultraviolet. Nature 226, 63–64 (1970). https://doi.org/10.1038/226063a0
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DOI: https://doi.org/10.1038/226063a0
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