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Photon-photon Interactions and the Opacity of the Universe in Gamma-Rays
Version 1 : Received: 28 March 2021 / Approved: 30 March 2021 / Online: 30 March 2021 (13:10:22 CEST)
How to cite: Franceschini, A. Photon-photon Interactions and the Opacity of the Universe in Gamma-Rays. Preprints 2021, 2021030737 Franceschini, A. Photon-photon Interactions and the Opacity of the Universe in Gamma-Rays. Preprints 2021, 2021030737
We discuss the topic of the transparency of the Universe in gamma-rays due to the Extragalactic Background Light, and its cosmological and physical implications. Rather than a review, this is a personal account on the development of 30 years of this branch of physical science. Extensive analysis of the currently available information appears to us as revealing a global coherence among the astrophysical, cosmological, and fundamental physics data, or, at least, no evident need so far of substantial modification of our present understanding. Deeper data from future experiments will verify to what extent and in which directions this conclusion should be modified.
High energy astrophysics; Background radiation; Photon-photon interaction; Pair production
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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