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arxiv: 0704.1299 · v1 · submitted 2007-04-10 · 🌌 astro-ph

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

C. Vignali (1) , W.N. Brandt (2) , O. Shemmer (2) , A. Steffen (2) , D.P. Schneider (2) , S. Kaspi (3 , 4) (Dipartimento di Astronomia , Universita' di Bologna
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Italy; (2) Department of Astronomy Astrophysics Pennsylvania State University University Park USA; (3) Wise Observatory Tel Aviv University Israel; (4) Physics Department Technion Haifa Israel)
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keywords quasarsx-raybroad-bandchandrachangesemissionfirstfocusing
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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.

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