July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

Diffuse CR, neutrino and gamma-ray fluxes from starburst and star-forming galaxies within the 'escape model'

Aug 1, 2015, 3:30 PM
1h
Amazon Foyer Terrace (World Forum)

Amazon Foyer Terrace

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 290
Poster contribution NU-TH Poster 2 DM and NU

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.
Collaboration -- not specified --
Registration number following "ICRC2015-I/" 623

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)

Presentation materials