Evidence that a cluster of UHECRs was produced by a burst or flare

Details Evidence that a cluster of UHECRs was produced by a burst or flare Evidence that a cluster of UHECRs was produced by a burst or flare

2007-08-12

arxiv.org/abs/0708.1617v1

Astronomy and Astrophysics

Astrophysics

Talk at the ICRC07, 4 pp

Scientific paper

The angular clustering of 5 Ultrahigh Energy Cosmic Rays (UHECRs) in the combined published AGASA-HiRes data has a probability of ~ 2 10^-3 of occurring by chance. A first analysis of the implications of the event energies and angular spreading is presented, which is applicable if the source is close enough that GZK losses can be ignored. Under this assumption, the observed energies of the events in this cluster favor a bursting rather than continuously emitting source, with the events emitted on a time scale short compared with 300 D_Mpc years. Assuming the UHECRs experience many incoherent small magnetic deflections enroute from source to Earth, the arrival direction distribution allows estimation that < B^2 lambda > D ~ 7.7 nG^2 Mpc^2, where lambda is the coherence length of the field and D is the source distance. If the spectrum at the source ~ E^{-2}, the total isotropic equivalent energy emitted in UHECRs is > 10^43 D_Mpc^3 ergs.

Affiliated with

Also associated with

No associations

Rating

Evidence that a cluster of UHECRs was produced by a burst or flare does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evidence that a cluster of UHECRs was produced by a burst or flare, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence that a cluster of UHECRs was produced by a burst or flare will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-451172