2 Black Hole Demographics : High Redshift QSOs
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The Black Hole - Bulge Relationship for QSOs at High Redshift
We examine the black hole mass galaxy bulge relationship in high-redshift QSOs. Black hole masses are derived from the broad emission lines, and the host galaxy stellar velocity dispersion σ∗ is estimated from the widths of the radio CO emission lines. At redshifts z > 3, the CO line widths are narrower than expected for the black hole mass, indicating that these giant black holes reside in und...
متن کاملBlack Hole Mass and Eddington Ratio as Drivers for the Observable Properties of Radio-Loud and Radio-Quiet QSOs
Recent studies of black holes in the nuclei of both active and normal galaxies have yielded relationships that permit a physical interpretation of the principal components of the spectra of QSOs. It is shown that principal component (or eigenvector) 1 (PC1) is driven predominantly by L/LEdd, and principal component 2 (PC2) is driven by accretion rate. This results in a PC2 vs. PC1 diagram in wh...
متن کاملThe Hosts of Z = 2 Qsos
We present results of the hosts of four high-redshift (z 2) and high luminosity (M B < ?28 mag) QSOs, three radio-quiet one radio-loud, imaged in R and K bands. The extensions to the nuclear unresolved source are most likely due to the hosts galaxies of these QSOs. The luminosities and sizes of the hosts overlap with those of actively star-forming galaxies in the nearby Universe. Radial prooles...
متن کامل06 51 8 v 1 2 4 Ju n 20 03 Eddington Accretion and QSO Emission Lines at z ∼ 2
Broad Absorption Line (BAL) QSOs have been suggested to be youthful super-accretors based on their powerful radiatively driven absorbing outflows and often reddened continua. To test this hypothesis, we observed near IR spectra of the Hβ region for 11 bright BAL QSOs at redshift z ∼2. We measured these and literature spectra for 6 BAL QSOs, 13 radio-loud and 7 radio-quiet non-BAL QSOs. Using th...
متن کاملIndicators of Black Hole Mass and Eddington Accretion Ratio from Qso X-ray and Uv Spectra
The evolution of luminous QSOs is linked to the evolution of massive galaxies. We know this because the relic black-holes found locally have masses dependent on the properties of the host galaxy’s bulge. An important way to explore this evolution would be to measure dependences of black hole masses and Eddington accretion ratios over a range of redshifts, i.e., with cosmological age. For low re...
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