Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-04-10
Astronomy and Astrophysics
Astrophysics
2 pages, to appear in "The Central Engine of Active Galactic Nuclei" (Xi'an, China, October 2006). Eds. Ho L.C. & Wang J.-M.,
Scientific paper
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 AGN are insensitive to the significant
changes occurring at z=0-6.
Brandt Wiliam N.
Kaspi Shai
Schneider David P.
Shemmer Ohad
Steffen Aaron
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