Theory of high-energy messengers

[摘要] Knowledge of the distant high-energy universe comes from photons, ultra-high energy cosmic rays (UHECRs), high-energy neutrinos, and gravitational waves. The theory of high-energy messengers reviewed here focuses on the extragalactic background light at all wavelengths, cosmic rays and magnetic fields in intergalactic space, and neutrinos of extragalactic origin. Comparisons are drawn between the intensities of photons and UHECRs in intergalactic space, and the high-energy neutrinos recently detected with IceCube at about the Waxman-Bahcall flux. Source candidates for UHECRs and high-energy neutrinos are reviewed, focusing on star-forming and radio-loud active galaxies. HAWC and Advanced LIGO are just underway, with much anticipation.

[发布机构] US Naval Research Laboratory, 4555 Overlook Ave. SW, Washington; DC; 20375, United States^1

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Active;galaxies;Extragalactic background light;Extragalactic origin;High energy neutrinos;Ice cubes;Intergalactic space;Radio loud;Ultra high-energy cosmic rays