Bounds on the density of sources of ultra-high energy cosmic rays from the Pierre Auger Observatory

AUGER COLLABORATION (VER F. SANCHEZ EN PUBL. ADJUNTA)

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS

IOP PUBLISHING LTD

Lugar: Londres; Año: 2013 p. 1 - 18

1475-7516

We derive lower bounds on the density of sources of ultra-high energy cosmic raysfrom the lack of significant clustering in the arrival directions of the highest energy eventsdetected at the Pierre Auger Observatory. The density of uniformly distributed sources ofequal intrinsic intensity was found to be larger than ∼ (0.06 − 5) × 10^−4 Mpc^−3 at 95%CL, depending on the magnitude of the magnetic deflections. Similar bounds, in the range(0.2 − 7) × 10^−4 Mpc^−3, were obtained for sources following the local matter distribution.