The GZK horizon and constraints on the cosmic ray source spectrum from observations in the GZK regime

Details The GZK horizon and constraints on the cosmic ray source spectrum from observations in the GZK regime The GZK horizon and constraints on the cosmic ray source spectrum from observations in the GZK regime

2007-11-22

arxiv.org/abs/0711.3635v2

JETP Lett.88:553-557,2009

Astronomy and Astrophysics

Astrophysics

v2: 5 pages, 3 figures; shortened, title changed, matches version to be published

Scientific paper

10.1134/S0021364008210017

We discuss the GZK horizon of protons and present a method to constrain the injection spectrum of ultrahigh energy cosmic rays (UHECRs) from supposedly identified extragalactic sources. This method can be applied even when only one or two events per source are observed and is based on the analysis of the probability for a given source to populate different energy bins, depending on the actual CR injection spectral index. In particular, we show that for a typical source density of $4\times 10^{-5} Mpc^{-3}$, a data set of 100 events above $6\times 10^{19}$ eV allows one in 97% of all cases to distinguish a source spectrum $dN/dE\propto E^{-1.1}$ from one with $E^{-2.7}$ at 95% confidence level.

Affiliated with

Also associated with

No associations

Rating

The GZK horizon and constraints on the cosmic ray source spectrum from observations in the GZK regime 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 The GZK horizon and constraints on the cosmic ray source spectrum from observations in the GZK regime, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The GZK horizon and constraints on the cosmic ray source spectrum from observations in the GZK regime will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-311276