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The AGN-Starburst Connection traced by the Nitrogen Abundance

Published online by Cambridge University Press:  21 February 2013

Kenta Matsuoka ,
Tohru Nagao ,
Alessandro Marconi ,
Roberto Maiolino  and
Yoshiaki Taniguchi
Kenta Matsuoka
Affiliation:
Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan – email: matsuoka@kusastro.kyoto-u.ac.jp
Tohru Nagao
Affiliation:
Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan
Alessandro Marconi
Affiliation:
Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan
Roberto Maiolino
Affiliation:
Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan
Yoshiaki Taniguchi
Affiliation:
Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan
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Abstract

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The connection between the active galactic nuclei (AGNs) and star formation activity is one of the most important issues in understanding the coevolution of supermassive black holes (SMBHs) and galaxies. In our recent study, by using SDSS quasar spectra we found that the emission-line flux rations involving a nitrogen line correlate with the Eddington ratio. This correlation suggests that the mass accretion in quasars is associated with a post-starburst phase, when AGB stars enrich the interstellar medium with the nitrogen. Moreover, we focused on nitrogen-loud quasars, that have prominent emission lines of the nitrogen, to investigate whether this argument is correct. In this symposium, we present our results regarding the relation between the star formation and feeding to SMBHs traced by the nitrogen abundance.

Keywords

galaxies: activegalaxies: evolutiongalaxies: nucleiquasars: emission lines
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S290: Feeding Compact Objects: Accretion on All Scales , August 2012 , pp. 273 - 274
Copyright
Copyright © International Astronomical Union 2013

References

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