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Published in 2017 at "Astronomische Nachrichten"
DOI: 10.1002/asna.201713337
Abstract: We briefly review how X-ray observations of high-redshift active galactic nuclei (AGNs) at z = 4–7 have played a critical role in understanding their basic demographics as well as their physical processes; for example, absorption…
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Keywords:
high redshift;
galactic nuclei;
active galactic;
xmm newton ... See more keywords