Isotropy constraints on powerful sources of ultrahigh-energy cosmic rays at $10^{19}$ eV
作者： Kohta Murase , Kohta Murase , Hajime Takami , Charles D. Dermer
DOI: 10.3847/0004-637X/817/1/59
关键词:
摘要: Anisotropy in the arrival direction distribution of ultrah igh-energy cosmic rays (UHECRs) produced by powerful sources is numerically evaluated. We show that, taking account Galactic magnetic field, nondetection significant anisotropy at ≈ 10 19 eV present and future experiments imposes general upper limits on UHECR proton luminosity steady as a function source redshifts. The constrain existence typical local universe an d limit density to be & -3 Mpc , assuming average intergalactic fields less than -9 G. This isotropy, which stronger measured highest energies, may indicate transient generation UHECRs. Our calculations are applied for extreme high-freq uency-peaked BL Lac objects 1ES 0229+200, 1101-232, 0347-121, test UHECR-induced cascade model, beamed protons generate TeV radiation transit from sources. While magnetic-field structure surrounding affects required absolute cosmic-ray blazars, Milky Way directly observed anisotropy. If both weak enough, these blazars should detectable Pierre Auger Observatory unless maximum energy well below eV. Furthermore, if UHECRs above eV, needed explain isotropy ∼ incompatible with large structures around all galaxies model work reasonable jet powers.
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