The Y-ray sky as a measure of history.

Details The Y-ray sky as a measure of history. The Y-ray sky as a measure of history.

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996cphe.conf..129b&link_type=abstract

Current perspectives in high energy astropyhsics, p. 129 - 135

Mathematics

Logic

X-Ray Background, X-Ray Background: Cosmology, X-Ray Background: Active Galactic Nuclei, X-Ray Background: Black Holes

Scientific paper

The high latitude X-ray sky is dominated by an isotropic cosmic background that provides a powerful demonstration of the cosmological principle - that we are not in a special place. The observed flux represents the emission of all the X-ray sources in previous epochs of the universe. Analysis of this background within the context of accretion driven active galactic nuclei indicates that most black hole galactic nuclei must be dormant at present but suggests that they were X-ray bright during a brief epoch signaling an early phase of galaxy formation.

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