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Metallicity Evolution of AGNs

Published online by Cambridge University Press:  03 June 2010

T. Nagao ,
R. Maiolino ,
A. Marconi ,
K. Matsuoka  and
Y. Taniguchi
T. Nagao
Affiliation:
Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan Research Center for Space and Cosmic Evolution, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan
R. Maiolino
Affiliation:
INAF – Osservatorio Astrofisico di Roma, via di Frascati 33, 00040 Monte Porzio Catone, Italy
A. Marconi
Affiliation:
Dipartimento di Astronomia e Scienza dello Spazio, Universita degli Studi di Firenze, Largo E. Fermi 2, 50125 Firenze, Italy
K. Matsuoka
Affiliation:
Graduate School of Science and Engineering, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan
Y. Taniguchi
Affiliation:
Research Center for Space and Cosmic Evolution, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577, Japan
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Abstract

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Chemical properties of AGNs and their redshift evolution are of interest to understand the star-formation history of AGN host galaxies and the co-evolution between galaxies and supermassive black holes (SMBHs). One important observational clue on this issue is a tight correlation between the AGN luminosity and the metallicity of the broad-line region. Surprisingly this relation shows no redshift evolution, even up to z ~ 6. This correlation is attributable mainly to the positive correlation between metallicity and SMBH mass, rather than to the relation between metallicity and Eddington ratio. A significant positive correlation between the metallicity and the AGN luminosity is also seen in narrow-line regions, not only in broad-line regions. Possible implications of these results on the galaxy–SMBH co-evolution are briefly mentioned.

Keywords

early universegalaxies: activegalaxies: evolutiongalaxies: high-redshiftgalaxies: nucleigalaxies: Seyfertquasars: emission linesquasars: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S267: Co-Evolution of Central Black Holes and Galaxies , August 2009 , pp. 73 - 79
Copyright
Copyright © International Astronomical Union 2010

References

Allen, M. G., et al. 2008, ApJS, 178, 20CrossRefGoogle Scholar
De Breuck, C., et al. 2000, A&A, 362, 519Google Scholar
Dietrich, M., et al. 2003a, ApJ, 596, 817CrossRefGoogle Scholar
Dietrich, M., et al. 2003b, ApJ, 589, 722CrossRefGoogle Scholar
Ferland, G. J., et al. 1998, PASP, 110, 761CrossRefGoogle Scholar
Franceschini, A., et al. 1999, MNRAS, 310, L5CrossRefGoogle Scholar
Granato, G. L., et al. 2004, ApJ, 600, 580CrossRefGoogle Scholar
Groves, B. A., Heckman, T. M., & Kauffmann, G. 2006, MNRAS, 371, 1559CrossRefGoogle Scholar
Hamann, F. & Ferland, G. 1993, ApJ, 418, 11CrossRefGoogle Scholar
Hamann, F. & Ferland, G. 1999, ARAA, 37, 487CrossRefGoogle Scholar
Imanishi, M. 2002, ApJ, 569, 44CrossRefGoogle Scholar
Iwamuro, F., et al. 2004, ApJ, 614, 69CrossRefGoogle Scholar
Jiang, L., et al. 2007, AJ, 134, 1150CrossRefGoogle Scholar
Juarez, Y., et al. 2009, A&A, 494, L25Google Scholar
Kawakatu, N., Umemura, M., & Mori, M. 2003, ApJ, 583, 85CrossRefGoogle Scholar
Kawakatu, N. & Wada, K. 2008, ApJ, 681, 73CrossRefGoogle Scholar
Maiolino, R., et al. 2003, ApJ, 596, L155CrossRefGoogle Scholar
Maiolino, R., et al. 2008, A&A, 488, 463Google Scholar
Maiolino, R., et al. 2004, A&A, 420, 889Google Scholar
Marconi, A. & Hunt, L. K. 2003, ApJ, 589, L21CrossRefGoogle Scholar
Matsuoka, K., et al. 2010, in preparationCrossRefGoogle Scholar
Matsuoka, K., et al. 2009, A&A, 503, 721Google Scholar
Murayama, T., et al. 1998, AJ, 115, 2237CrossRefGoogle Scholar
Murayama, T., et al. 1999, AJ, 117, 1645CrossRefGoogle Scholar
Nagao, T., Maiolino, R., & Marconi, A. 2006a, A&A, 447, 863Google Scholar
Nagao, T., Marconi, A., & Maiolino, R. 2006b, A&A, 447, 157Google Scholar
Overzier, E. A., et al. 2001, A&A, 367, L5Google Scholar
Sameshima, H., et al. 2009, MNRAS, 395, 1087CrossRefGoogle Scholar
Shemmer, O., et al. 2004, ApJ, 614, 547CrossRefGoogle Scholar
Silverman, J. D., et al. 2009, ApJ, 696, 396CrossRefGoogle Scholar
Tremonti, C. A., et al. 2004, ApJ, 613, 898CrossRefGoogle Scholar
Vestergaard, M. & Wilkes, B. J. 2001, ApJS, 134, 1CrossRefGoogle Scholar
Warner, C., Hamann, F., & Dietrich, M. 2004, ApJ, 608, 136CrossRefGoogle Scholar