Abstract
Recently, Lucke et al.1 found [Fe XIV] 5,303 Å emission from Puppis A to be much less intense than that expected from the X-ray data given by Zarnecki et al.2. We propose here that this discrepancy can be removed by taking into account the nonequilibrium state of ionisation within the X-ray source.
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Itoh, H. X-ray and [Fe XIV] 5,303 Å emission from Puppis A supernova remnant. Nature 281, 656–657 (1979). https://doi.org/10.1038/281656a0
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DOI: https://doi.org/10.1038/281656a0
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