Abstract / Description of output
New virial black-hole mass estimates are presented for a sample of 72 AGN covering three decades in optical luminosity. Using a model in which the AGN broad line region (BLR) has a flattened geometry, we investigate the M-bh- L-bulge relation for a combined 90-object sample, consisting of the AGN plus a sample of 18 nearby inactive elliptical galaxies with dynamical black-hole mass measurements. It is found that, for all reasonable mass-to-fight ratios, the M-bh - L-bulge relation is equivalent to a linear scaling between bulge and black-hole mass. The best-fitting normalization of the M-bh-M-bulge M-bulge relation is found to be M-bh = 0.0012M(bulge) in agreement with recent black-hole mass studies based on stellar velocity dispersions. Furthermore, the scatter around the Mbh - Lbulge relation for the full sample is found to be significantly smaller than has been previously reported (Delta log M-bh = 0.39 dex). Finally, using the nearby inactive elliptical galaxy sample alone, it is shown that the scatter in the M-bh - L-bulge relation is only 0.33 dex, comparable to that of the M-bh - sigma relation. These results indicate that reliable black-hole mass estimates can be obtained for high redshift galaxies.
| Original language | English |
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| Title of host publication | MASS OF GALAXIES AT LOW AND HIGH REDSHIFT |
| Editors | T Bender, A Renzini |
| Place of Publication | BERLIN |
| Publisher | Springer |
| Pages | 26-31 |
| Number of pages | 6 |
| ISBN (Print) | 3-540-00205-7 |
| Publication status | Published - 2003 |
| Event | Workshop on the Mass of Galaxies at Low and High Redshift - VENICE Duration: 24 Oct 2001 → 26 Oct 2001 |
Conference
| Conference | Workshop on the Mass of Galaxies at Low and High Redshift |
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| City | VENICE |
| Period | 24/10/01 → 26/10/01 |