X-rays from the First Massive Black Holes

Details X-rays from the First Massive Black Holes X-rays from the First Massive Black Holes

2004-11-12

arxiv.org/abs/astro-ph/0411355v1

Astronomy and Astrophysics

Astrophysics

Contribution to proceedings of the conference on "Growing Black Holes" held in Garching, Germany on June 21-25, 2004. Edited b

Scientific paper

10.1016/j.asr.2004.02.017

We briefly review some recent results from Chandra and XMM-Newton studies of the highest redshift (z > 4) active galactic nuclei (AGNs). Specific topics covered include radio-quiet quasars, radio-loud quasars, moderate-luminosity AGNs in X-ray surveys, and future prospects. No significant changes in AGN X-ray emission properties have yet been found at high redshift, indicating that the small-scale X-ray emission regions of AGNs are insensitive to the dramatic changes on larger scales that occur from z = 0-6. X-ray observations are also constraining the environments of high-redshift AGNs, relevant emission processes, and high-redshift AGN demography.

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