PT Journal
AU Pierre Auger Collaboration (Abreu, Pea
   Pastor, S
TI Bounds on the density of sources of ultra-high energy cosmic rays from the Pierre Auger Observatory
SO Journal of Cosmology and Astroparticle Physics
JI J. Cosmol. Astropart. Phys.
PY 2013
BP 009
EP 19pp
VL 05
IS 5
DI 10.1088/1475-7516/2013/05/009
LA English
DE ultra high energy cosmic rays; cosmic ray experiments
AB We derive lower bounds on the density of sources of ultra-high energy cosmic rays from the lack of significant clustering in the arrival directions of the highest energy events detected at the Pierre Auger Observatory. The density of uniformly distributed sources of equal intrinsic intensity was found to be larger than similar to (0.06 – 5) x 10(-4) Mpc(-3) at 95% CL, depending on the magnitude of the magnetic defections. Similar bounds, in the range (0.2 – 7) x 10(-4) Mpc(-3), were obtained for sources following the local matter distribution.
ER