Thread: What can we learn from narrowband filters?
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Old 20-11-2014, 03:03 PM
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Merlin66 (Ken)
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I did a search in Gray & Corbally "Stellar Spectral Classification"...
interestingly neither the SII or NII lines show up in WR or any of emission stars....
I can only find references to these lines in some Nova listings and a few nebulae.
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