Abstract
The weakness of ultraviolet CN bands in the spectrum of ν Indi implies that, while carbon and metals are deficient (compared with the Sun) by a factor of about fifteen, nitrogen is still more deficient by a factor between four and eight.
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HARMER, D., PAGEL, B. ν Indi: A Weak-lined Halo Star with Excess Deficiency of Nitrogen. Nature 225, 349–351 (1970). https://doi.org/10.1038/225349a0
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DOI: https://doi.org/10.1038/225349a0
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