Cosmology with 100-TeV <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>γ</mi></math></span>-ray telescopes

F. Halzen; R. J. Protheroe; T. Stanev; H. P. Vankov

doi:10.1103/PhysRevD.41.342

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Cosmology with 100-TeV $γ$ -ray telescopes

F. Halzen

R. J. Protheroe

T. Stanev and H. P. Vankov^*

Department of Physics, University of Wisconsin, Madison, Wisconsin 53706

Department of Physics and Mathematical Physics, University of Adelaide, Adelaide, South Australia 5001, Australia

Bartol Research Institute, University of Delaware, Newark, Delaware 19716

^*On leave of absence from the Institute for Nuclear Research and Nuclear Energy, Sofia 1784, Bulgaria.

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Phys. Rev. D 41, 342 – Published 15 January, 1990

DOI: https://doi.org/10.1103/PhysRevD.41.342

Abstract

We show that the secondary photons which are by-products of the energy loss of extragalactic cosmic rays interacting with the cosmic background have a characteristic energy of 10-100 TeV. For a model where the extragalactic cosmic rays are uniformly distributed in space and in time over the past $10^{9}$ yr the flux of 100-TeV photons is $10^{- 5}$ of the cosmic-ray flux. Such fluxes are attractively close to the resolution of the new generation of $γ$ -ray telescopes and their detection can provide important cosmological information.

References (12)

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[c1] G. R. Blumenthal, Phys. Rev. D 1, 1596 (1970)

[c2] K. Greisen, Phys. Rev. Lett. 16, 748 (1966) G. T. Zatsepin and V. A. Kuzmin, Pis'ma Zh. Eksp. Teor. Fiz. 4, 53 (1966) [JETP Lett. 4, 78 (1966)] C. T. Hill and D. N. Schramm, Phys. Rev. D 31, 564 (1985) F. A. Aharonian and V. V. Vardanian, Yerevan report, 1987 (unpublished)

[c3] J. Wdowczyk, W. Tkaczyk, and A. W. Wolfendale, J. Phys. A 5, 1419 (1972) F. W. Stecker, Astrophys. Space Sci. 20, 47 (1973)

[c4] K. G. Gibbs et al., Nucl. Instrum. Methods A264, 67 (1988) B. L. Dingus et al., Phys. Rev. Lett. 61, 1906 (1988)

[c5] M. C. Allcock and J. Wdowczyk, Nuovo Cimento 9B, 315 1972 S. A. Bonometto et al., Astron. Astrophys. 31, 41 (1974)

[c6] R. W. Brown et al., Phys. Rev. D 8, 3083 (1973)

[c7] Wdowczyk, Tkaczyk, and Wolfendale ([3])

[c8] R. M. Baltrusaitis et al., Phys. Rev. Lett. 54, 1875 (1985)

[c9] R. J. Protheroe, Mon. Not. R. Astron. Soc. 221, 769 (1986)

[c10] A. Strong, J. Wdowczyk, and A. W. Wolfendale, J. Phys. A 7, 120 (1974)

[c11] J. Wdowczyk and A. W. Wolfendale, Nature (London) 305, 67 (1988)

[c12] G. Cunningham et al., Astrophys. J. 236, L71 (1980)

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Cosmology with 100-TeV $γ$ -ray telescopes

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Cosmology with 100-TeV γ-ray telescopes

Abstract

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Cosmology with 100-TeV $γ$ -ray telescopes