The obscuration by dust of most of the growth of supermassive black holes

Alejo Martínez-Sansigre (), Steve Rawlings, Mark Lacy, Dario Fadda, Francine R. Marleau, Chris Simpson, Chris J. Willott and Matt J. Jarvis
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Alejo Martínez-Sansigre: University of Oxford
Steve Rawlings: University of Oxford
Mark Lacy: California Institute of Technology, MS220-6
Dario Fadda: California Institute of Technology, MS220-6
Francine R. Marleau: California Institute of Technology, MS220-6
Chris Simpson: University of Durham
Chris J. Willott: National Research Council
Matt J. Jarvis: University of Oxford

Nature, 2005, vol. 436, issue 7051, 666-669

Abstract: For years The large population of quasars or supermassive black holes predicted from models of the cosmic X-ray background has been elusive. But now infrared data from the Spitzer Space Telescope reveal a population of obscured quasars at high redshift outnumbering unobscured quasars 3 to 1. This means that most black hole growth in the Universe occurs in the dusty gas-rich centres of active galaxies.

Date: 2005
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DOI: 10.1038/nature03829

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