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Looking for galactic sources of astrophysical neutrinos

Looking for galactic sources of astrophysical neutrinos. Dmitri Semikoz APC, Paris. Overview:. Galactic to extragalactic transition of cosmic rays Astrophysical neutrinos: evidence of galactic contribution in 4 yr data Update for recent data Conclusions.

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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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