Cosmic horizon for GeV sources and photon-photon scattering
G.V. Vereshchagin
TL;DR
This paper accurately determines the cosmic horizon for GeV gamma-ray sources by analyzing photon-photon scattering with the exact cross section, revealing dominance over pair production at certain energies and redshifts.
Contribution
It provides a precise calculation of the cosmic horizon considering the exact photon-photon scattering cross section, improving upon previous approximations.
Findings
Photon-photon scattering dominates over pair production below 1.68 GeV.
Photon-photon scattering is significant at redshifts greater than 180.
The cosmic horizon for GeV sources is accurately characterized.
Abstract
Photon-photon scattering of gamma-rays on the cosmic microwave background has been studied using the low energy approximation of the total cross section by Zdziarski & Svensson (1989); Svensson & Zdziarski (1990). Here, the cosmic horizon due to photon-photon scattering is accurately determined using the exact cross section and we find that photon-photon scattering dominates over the pair production at energies smaller than 1.68 GeV and at redshifts larger than 180.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.