Predicted High Energy Break in the Isotropic Gamma Ray Spectrum: a Test of Cosmological Origin | Zendy

G. G. Fazio | Zendy; F. W. Stecker | Zendy

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Predicted High Energy Break in the Isotropic Gamma Ray Spectrum: a Test of Cosmological Origin

Author(s) -

G. G. Fazio,

F. W. Stecker

Publication year - 1970

Publication title -

nature

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 15.993

H-Index - 1226

eISSN - 1476-4687

pISSN - 0028-0836

DOI - 10.1038/226135a0

Subject(s) - physics , isotropy , astrophysics , redshift , cosmic ray , ultra high energy cosmic ray , cosmic cancer database , high energy , radiation , background radiation , universe , energy spectrum , astronomy , nuclear physics , particle physics , optics , galaxy

RECENT work by one of us (F. W. S.) has emphasized the possible cosmological significance of the study of the isotropic component of cosmic γ-radiation between 1 and 100 MeV energy1–3. Vette et al. (ref. 4 and unpublished) have presented evidence for a new component of isotropic γ-radiation above 1 MeV energy being distinct in nature and origin from that at lower energies. At present, these data are consistent only with the hypothesis previously discussed5,6 that these γ-rays are the redshifted remnant of cosmic-ray interactions producing pions at an earlier stage in the evolution of the universe corresponding to a redshift z≃100.

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