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Paper: Studying the Clustering and Black Hole Masses of Active Galactic Nuclei with the SDSS and Future Surveys
Volume: 399, Panoramic Views of Galaxy Formation and Evolution
Page: 12
Authors: Strauss, M.A.; Shen, Y.; Bahcall, N.A.; Hall, P.B.
Abstract: Recent observations have shown that the story of galaxy evolution and the study of active galactic nuclei are tightly coupled. In particular, the AGN phenomenon is a consequence of the rapid growth of supermassive black holes which are known to be ubiquitous in the centers of galaxies with bulges. Here we use data from the Sloan Digital Sky Survey (SDSS) to explore two aspects of this question: the clustering of high-redshift quasars allows us to estimate the mass of the haloes hosting these quasars, and their spectra allow a measurement of the black hole mass. We find that high-redshift quasars (z > 2.9) are very strongly clustered, and are hosted by dark matter haloes of masses of several ×1012M. The appreciable scatter in the virial black hole mass estimates gives rise to biases in the distribution of black holes and Eddington ratios; correcting for these biases, we find that the Eddington ratio distribution for luminous SDSS quasars peaks at 0.3 with a scatter of 0.4 dex.
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