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- Title
Search for the Galactic Disk and Halo Components in the Arrival Directions of High-Energy Astrophysical Neutrinos.
- Authors
Troitsky, S.
- Abstract
The arrival directions of 40 neutrino events with energies ≳100 TeV, observed by the IceCube experiment, are studied. Their distribution in the Galactic latitude and in the angular distance to the Galactic Center allow searching for the Milky-Way disk and halo-related components, respectively. No statistically significant evidence for the disk component is found, though even 100% disk origin of the flux is allowed at the 90% confidence level. Contrary, the Galactic Center-Anticenter dipole anisotropy, specific for dark-matter decays (annihilation) or for interactions of cosmic rays with the extended halo of the circumgalactic gas, is clearly favored over the isotropic distribution (the probability of fluctuation of the isotropic signal is ~2%).
- Subjects
ASTROPHYSICS; NEUTRINOS; ANISOTROPY; ANNIHILATIONISM (Christianity); COSMIC rays; RADIOACTIVE decay
- Publication
JETP Letters, 2015, Vol 102, Issue 12, p785
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/S0021364015240133