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In this manuscript, we proposed an interesting method to test the dualsupermassive black hole model for AGN with double-peaked narrow \oiii lines(double-peaked narrow emitters), through their broad optical Balmer lineproperties. Under the dual supermassive black hole model for double-peakednarrow emitters, we could expect statistically smaller virial black hole massesestimated by observed broad Balmer line properties than true black hole masses(total masses of central two black holes). Then, we compare the virial blackhole masses between a sample of 37 double-peaked narrow emitters with broadBalmer lines and samples of SDSS selected normal broad line AGN withsingle-peaked \oiii lines. However, we can find clearly statistically largercalculated virial black hole masses for the 37 broad line AGN withdouble-peaked \oiii lines than for samples of normal broad line AGN. Therefore,we give our conclusion that the dual supermassive black hole model is probablynot statistically preferred to the double-peaked narrow emitters, and moreefforts should be necessary to carefully find candidates for dual supermassiveblack holes by observed double-peaked narrow emission lines.

To test dual supermassive black hole model for broad line AGN with double-peaked narrow [OIII] lines