2009ApJ...698..859M

We present our analysis of the three H II-buried active galactic nucleus: SDSS J091053+333008, SDSS J121837+091324, and SDSS J153002-020415, by studying their optical spectra extracted from Sloan Digital Sky Survey. The location in the BPT diagnostic diagrams of the three galaxies indicates that the narrow emission lines are mainly exited from H II regions. However, after the removal of the host galaxy's stellar emission, the emission lines display the typical feature of Narrow-Line Seyfert 1-like. All the three objects have large Eddington ratio, small black hole mass, and low star formation rate. We propose that the three galaxies are at the transit stage from the starburst-dominated phase to AGN-dominated phase.