2007/04/10 by C. Vignali, W. N. Brandt, Vignali, C. +9
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.0704.1299
2 pages, to appear in "The Central Engine of Active Galactic Nuclei" (Xi'an, China, October 2006). Eds. Ho L.C. & Wang J.-M., ASP conference series
arxiv created 2007/04/10 · arxiv updated 2009/12/01
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.