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Narrow-line seyfert 1 galaxies：the [O III] λ5007/Hβ ratio and photoionization models for the nlr
seyfert 1 galaxies photoionization models λ5007/Hβ ratio
2009/6/5
Narrow-line seyfert 1 galaxies：the [O III] λ5007/Hβ ratio and photoionization models for the nlr。
Photoionization of galactic halo gas by old supernova remnants
Photoionization old supernova remnants galactic halo gas
2009/6/5
Photoionization of galactic halo gas by old supernova remnants。