Abstract
Isotropic cosmic X-rays in the I keV–I MeV range may be due to the Compton-blackbody process acting in remote radio galaxies or quasars. The break in the X-ray spectrum then poses a stringent condition on theories of radio source evolution and distribution.
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FELTEN, J., REES, M. Cosmological Implications of the Diffuse X-Ray Background. Nature 221, 924–926 (1969). https://doi.org/10.1038/221924a0
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DOI: https://doi.org/10.1038/221924a0
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