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Looking for galactic sources of astrophysical neutrinos

Explore the transition of cosmic rays, recent data updates, and conclusions on galactic and extragalactic neutrinos. Discover UHECR models, Auger Observatory, compositions, anisotropy, and Turb. Magn. Field spectrum calculations.

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Looking for galactic sources of astrophysical neutrinos

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  1. Looking for galactic sources of astrophysical neutrinos Dmitri Semikoz APC, Paris

  2. Overview: • Galactic to extragalactic transition of cosmic rays • Astrophysical neutrinos: evidence of galactic contribution in 4 yr data • Update for recent data • Conclusions

  3. Transition from galactic to extragalactic cosmic rays

  4. Dip model: Protons can fit UHECR data V.Berezinsky , astro-ph/0509069

  5. Pierre Auger Observatory South site in Argentina almost finishedNorth site – project Surface Array 1600 detector stations 1.5 Km spacing 3000 Km2 (30xAGASA) Fluorescence Detectors 4 Telescope enclosures 6 Telescopes per enclosure 24 Telescopes total

  6. Auger composition 2009: nuclei!

  7. Mixed composition model D.Allard, E.Parizot and A.Olinto, astro-ph/0512345

  8. UHECR sources with mixed composition FromD.Allard et al

  9. Anisotropy dipole Pierre Auger Collaboration, arXiv:1103.2721

  10. Anisotropy dipole Pierre Auger Collaboration, arXiv:1709.07321

  11. Auger cosmposition measurements Auger Collaboration, arXiv:1409.5083

  12. Galactic sources: dipole calculation Turb. Magn. Field spectrum Kolmogorov/Kraichnan Lmax = 100-300 pc G.Giacinti, M.Kachelriess, D.S. and G.Gigl, arXiv:1112.5599

  13. Auger limit on Fe fraction

  14. Extragalactic proton sources G.Giacinti et al,1502.01608

  15. UHECR sources p-gamma interaction with tau>1 for nuclei D.Allard et al, 1505.1377 M.Unger et al, 1505.02153

  16. Astrophysical neutrinos 4 years data and galactic contribution

  17. IceCube data 4 years IceCube, ICRC 2015

  18. IceCube + Fermi LAT extragalactic HESS arXiv:1603.07730

  19. IceCube + Fermi LAT extragalactic HESS arXiv:1603.07730

  20. IceCube + Fermi LAT extragalactic A.Neronov, D.S. arXiv:1412.1690

  21. IceCube + Fermi LAT all sky: protons 1/E^2.5 A.Neronov, D.S. arXiv:1412.1690

  22. IceCube neutrino sky map 4 years E> 100 TeV and Fermi E>100 GeV 5 degree smoothed

  23. Evidence of Galactic component in 4 year IceCube data E>100 TeV A. Neronov & D.S. arXiv: 1509.03522

  24. Post-trial probability is 1.7*10-3 A. Neronov & D.S. arXiv: 1509.03522

  25. From F.Halzen, Paris 2016

  26. muon neutrinos through the Earth  6 sigma From F.Halzen, Paris 2016

  27. up-going nm From F.Halzen, Paris 2016

  28. 6 years of IceCube data: sensitivity to Galactic plane IceCubecollabortion, arXiv: 1607.08006

  29. North and South sky: IceCube A. Neronov & D.S. arXiv: 1603.06733

  30. First galactic diffuse sources A. Neronov & D.S. arXiv: 1603.06733

  31. Astrophysical neutrinos 6 years data and galactic contribution

  32. IceCube cascades 6 yr ICRC 2017

  33. IceCube 2 components ICRC 2017

  34. IceCube and ANTARES galalactic plane ICRC 2017

  35. Sky map HESE at E>100 TeV A. Neronov & D.S., in preparation

  36. Anisotropy at E>100 TeV A. Neronov & D.S., in preparation

  37. Summary • Galactic to extragalactic transition is around 10 PeV in protons, i.e. one expects both contributions for 1 PeV neutrinos • First diffuse neutrino flux measurements contain both galactic and extragalactic components. Some evidence of Galactic component come in 4 years of IceCube cascade data • Galactic component can give 50% of total flux at 100 TeV, but can be as low as 10% in the north sky

  38. Summary • With 6 years one can allow 30 % from galactic plane at 100 TeV and some out of plane non-uniform signal. Need in more data to find real fraction. • Extragalactic component was measured with 6 years of muon neutrino data. It has flux 1/E^2.1 above 200 TeV and unknown origin • Sources of UHECR can give main contribution to extragalactic astrophysical neutrinos if after p-gamma protons come through p-p interactions (talk of M.Kachelriess)

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