Speaker
Markus Ahlers
(UW-Madison & WIPAC)
Description
The IceCube Collaboration has recently reported evidence for an extraterrestrial
neutrino flux. The flux is consistent with an isotropic diffuse emission which favors an
extragalactic origin. However, it is not yet possible to rule out a quasi-diffuse or sub-
dominant emission from multiple high-latitude or extended Galactic sources. I discuss
the implications of gamma-ray observations for various Galactic or extragalactic
candidate sources of the IceCube excess. The contribution of Galactic sources can be
tested via primary TeV-PeV gamma-rays from the decay of neutral pions produced in
the same cosmic ray interactions. Hadronuclear interactions of cosmic rays in
extragalactic sources can be tested by secondary GeV-TeV diffuse gamma-rays observed
by Fermi.
Primary author
Markus Ahlers
(UW-Madison & WIPAC)
