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astro-ph2008★ 106 cited
On the radiative efficiencies, Eddington ratios, and duty cycles of luminous high-redshift quasars
Francesco Shankar, Martin Crocce, Jordi Miralda-Escude' +2
We investigate the characteristic radiative efficiency ε, Eddington ratio λ, and duty cycle P_0 of high-redshift active galactic nuclei (AGN), drawing on measurements of the AGN lu…
astro-ph2008★ 69 cited
The High-Mass End of the Black Hole Mass Function: Mass Estimates in Brightest Cluster Galaxies
E. Dalla Bonta', L. Ferrarese, E. M. Corsini +5
We present Hubble Space Telescope imaging and spectroscopic observations of three Brightest Cluster Galaxies, Abell 1836-BCG, Abell 2052-BCG, and Abell 3565-BCG, obtained with the…