Other
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...20111418w&link_type=abstract
American Astronomical Society, 201st AAS Meeting, #114.18; Bulletin of the American Astronomical Society, Vol. 34, p.1289
Other
Scientific paper
We analyze a large sample of 578 Active Galactic Nuclei and report on possible trends between supermassive black hole (SMBH) mass, metallicity, and host galaxy mass. The sample spans five orders of magnitude in SMBH mass and a redshift range from 0 <= z <= 5. Recent studies have suggested that there is a relationship between SMBH mass and the overall bulge/spheroidal component mass of the surrounding galaxy. This relation, together with the well-known mass-metallicity relationship for galaxies, predicts a relationship between SMBH mass and quasar metallicity. We estimate the metallicity in the broad emission line region by comparing emission line ratios involving nitrogen to theoretical predictions. We find that the data are consistent with a trend between SMBH mass and metallicity, with some line ratios indicating a very strong trend but uncertainties in several other line ratios are too large to confirm or test this correlation. We also compare the SMBH masses and metallcities with existing HST images of the host galaxies for many of these AGNs in order to test the hypotheses that i) SMBH mass correlates with host galaxy mass and ii) quasar metallicities also scale with the host galaxy mass.
Constantin Adrian
Dietrich Matthew
Hamann Fred
Junkkarinen Vesa
Shields Joseph C.
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