Neutrinos as a diagnostic of cosmic ray Galactic/extra-galactic transition

Details Neutrinos as a diagnostic of cosmic ray Galactic/extra-galactic transition Neutrinos as a diagnostic of cosmic ray Galactic/extra-galactic transition

2005-03-10

arxiv.org/abs/astro-ph/0503229v2

Phys.Rev. D72 (2005) 023001

Astronomy and Astrophysics

Astrophysics

To be published in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.72.023001

Motivated by a recent change in viewing the onset of the extra-galactic component in the cosmic ray spectrum, we have fitted the observed data down to $10^{8.6}$ GeV and have obtained the corresponding power emissivity. This transition energy is well below the threshold for resonant $p\gamma$ absorption on the cosmic microwave background, and thus source evolution is an essential ingredient in the fitting procedure. Two-parameter fits in the spectral and redshift evolution indices show that a standard Fermi $E_i^{-2}$ source spectrum is excluded at larger than 95% confidence level (CL). Armed with the primordial emissivity, we follow Waxman and Bahcall to derive the associated neutrino flux on the basis of optically thin sources. For $pp$ interactions as the generating mechanism, the neutrino flux exceeds the AMANDA-B10 90%CL upper limits. In the case of $p\gamma$ dominance, the flux is marginally consistent with AMANDA-B10 data. In the new scenario the source neutrino flux dominates over the cosmogenic flux at all energies. Thus, should data from AMANDA-II prove consistent with the model, we show that IceCube can measure the characteristic power law of the neutrino spectrum, and thus provide a window on the source dynamics.

Affiliated with

Also associated with

No associations

Rating

Neutrinos as a diagnostic of cosmic ray Galactic/extra-galactic transition 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 Neutrinos as a diagnostic of cosmic ray Galactic/extra-galactic transition, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutrinos as a diagnostic of cosmic ray Galactic/extra-galactic transition will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-345695