Speaker
Gwenael Giacinti
(University of Oxford, Clarendon Laboratory)
Description
We have shown that the cosmic ray (CR) knee can be entirely explained by energy-dependent CR leakage from the Milky Way, with an excellent fit to all existing data ("escape model"), see Contribution 122, CR-TH, from D. SEMIKOZ.
In the present work, we have applied our escape model to other normal galaxies. We have also calculated the CR flux expected to leak from starburst galaxies. From this, we have inferred the diffuse CR intensity from normal and starburst galaxies, and compared the resulting nuclear composition at Earth with observational constraints.
We have then computed the diffuse neutrino and gamma-ray fluxes (produced by CR interactions with gas in their host galaxies), and compared our results to the recent IceCube observations of high-energy neutrinos and to the Fermi-LAT determination of the diffuse extragalactic gamma-ray background.
| Registration number following "ICRC2015-I/" | 623 |
|---|---|
| Collaboration | -- not specified -- |
Primary author
Gwenael Giacinti
(University of Oxford, Clarendon Laboratory)
Co-authors
Dmitri Semikoz
(APC - Paris Diderot)
Prof.
Michael Kachelriess
(NTNU Norway)
Oleg Kalashev
(Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia)
