Physics
Scientific paper
Nov 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sacm.confe..31n&link_type=abstract
The Starburst-AGN Connection under the Multiwavelength Limelight, held 14-16 September 2011. Published online at http://www.scio
Physics
Scientific paper
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. In this contribution I would report these results based on the SDSS dataset and our own observations with Subaru and VLT, and discuss possible implications on the galaxy-SMBH co-evolution.
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