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  • Constraints on UHECR sources and their environments, from fitting UHECR spectrum and composition, and neutrinos and gammas.
Title: Constraints on UHECR sources and their environments, from fitting UHECR spectrum and composition, and neutrinos and gammas.
Award ID(s):
2013199
PAR ID:
10472530
Author(s) / Creator(s):
; ;
Corporate Creator(s):
Publisher / Repository:
Sissa Medialab
Date Published:
Page Range / eLocation ID:
364
Format(s):
Medium: X
Location:
Madison, WI, U.S.A.
Sponsoring Org:
National Science Foundation
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    Abstract Interactions of ultra-high-energy cosmic rays (UHECRs) in the surroundings of their accelerators can naturally explain the observed spectrum and composition of UHECRs, including the abundance of protons below the ankle. Here we show that astrophysical properties of the UHECR source environment such as the temperature, size, and magnetic field can be constrained by UHECR and neutrino data. Applying this to candidate sources with a simple structure shows that starburst galaxies are consistent with these constraints, but galaxy clusters are in tension with them. For multicomponent systems like active galactic nuclei and gamma-ray bursts, the results are indicative, but a customized analysis is needed for definitive conclusions. 
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