(Proposal ID) S14A-131 (PI) Matsuoka Kenta (Proposal Title) Rapid Black-Hole Growth in the Nitrogen-Rich Era (Abstract) The connection between the active galactic nuclei (AGNs) and star formation is one of the most crucial aspects in understanding the co-evolution of supermassive black holes (SMBHs) and galaxies. In Matsuoka et al. (2011, A&A, 527, A100), by using SDSS quasar spectra we found that the nitrogen abundance correlates with the Eddington ratio. This correlation suggests that the mass accretion is associated with a post-starburst phase, when AGB stars enrich the interstellar medium with nitrogen. To further pursue this relation, we focus on nitrogen-loud quasars that show extremely strong emission lines of nitrogen (e.g., N iv]lambda1486 and N iii]lambda1750) due to high-abundance of nitrogen instead of high metallicity. Based on the C iv lambda1549 line which is available in SDSS optical spectra, we found they may show high accretion rate, supporting above correlation. However, this is not enough to confirm the relation since the C iv line may be unreliable as a mass indicator. In this proposal, we detect the Halpha line which is reliable to estimate black-hole masses, and to shed light on the AGN-starburst connection.