Gas Metallicity of Narrow-line Regions in Narrow-line Seyfert 1 Galaxies and Broad-line Seyfert 1 Galaxies


We investigate gas metallicity of narrow-line regions in narrow-line Seyfert 1 galaxies (NLS1s) and broad-line ones (BLS1s) in order to examine whether or not there is a difference in the gas metallicity between the two populations of Seyfert 1 galaxies. We apply two methods to study this issue. One is to use the emission-line flux ratio of [N ii]λ6583/H… (More)

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