The Low Energy Diffuse Cosmic X-Radiation

Details The Low Energy Diffuse Cosmic X-Radiation The Low Energy Diffuse Cosmic X-Radiation

Aug 1968

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1968isasr.428..289w&link_type=abstract

ISAS Research Note, vol.428, p.289-300

Computer Science

X-Rays: Diffuse Background, Radiation Mechanisms: General, Cosmic Microwave Background

Scientific paper

Recent measurements of diffuse X-rays in the 1-10 KeV energy region are reviewed. The results suggest that a single-exponent power-law spectrum, consistent with observations above about 50 KeV, is inadequate at lower energies. It is shown that the trend between 100 and 10 KeV to a flatter spectrum consistent with the 1-10 KeV data may be attributable to the possible existence of electron populations in the metagalaxy with different power-law exponents. Such energy spectra arise naturally from a recent model for the evolution of radio sources proposed by Kellermann. It is suggested that the Felton-Morrison hypothesis of the interaction of metagalactic electrons with 3o K thermal photons may therefore play a dominant role in the origin of the diffuse radiation. Two measurements at 0.25 KeV favour an alternative source of radiation to explain the rather large fluxes in this energy region. Continuation of measurements linking the 0.25 and 1.0 KeV data is of vital importance in determining the composition and characteristics of the intergalactic gas.

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