The Realm of the First Quasars in the Universe: the X-ray View

C. Vignali,W. N. Brandt,O. Shemmer,A. Steffen,D. P. Schneider,S. Kaspi

Astronomical Society of the Pacific Conference Series（2007）

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摘要

We review the X-ray studies of the highest redshift quasars, focusing on the results obtained with Chandra and XMM-Newton. Overall, the X-ray and broad-band properties of z > 4 quasars and local quasars are similar, suggesting that the small-scale X-ray emission regions of active galactic nuclei (AGN) are insensitive to the significant cosmic changes occurring from z approximate to 0-6.

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关键词

active galactic nuclei

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