UHECR besides Cen A : Hints of galactic sources

Abstract

Ultra High Energy Cosmic Rays, UHECR, maybe protons, as most still believe and claim, or nuclei; in particular lightest nuclei as we advocated recently. The two model offer a dramatic different view of the UHECR sky because different galactic Lorentz deflection and GZK cut-off. The first (Auger Collaboration) nucleon proposal (2007) Pierre Auger Collaboration (2007) [1] foresaw to trace clearly the UHECR GZK Universe reaching far (up to 100 Mpc) Super-Galactic-Plane, with little angular dispersion. On the contrary Lightest Nuclei model (2008) Fargion et al. (2008) [2], inspired by observed composition and by nearest Cen A clustering (almost a quarter of the AUGER events) explains (by cut off) a modest and narrow (few Mpc) Universe view, as well as the puzzling Virgo absence. The lightest nuclei offer a little blurred Astronomy. Here we address a part of the remaining scattered events in the new up-dated Auger map (March 2009-ICRC09). We found within the rarest clustering the surprising imprint of a few remarkable galactic sources. In particular we recognize a first trace of Vela, brightest gamma and radio galactic source, and smeared sources along the Galactic Plane and Center. We expect in the near future much more clustering along Cen A and a few more conforming to those galactic sources. The clustering may imply additional tails of fragments (by nuclei photo-dissociation) at half energies ( 2 – 4 ⋅ 10 19 eV ). The UHECR light-nuclei fragility and opacity may also reflect into a train of secondaries as gamma and neutrinos UHE events at tens or hundred PeVs. These UHE neutrinos might be detectable in the near future within the nearest AUGER and Array Fluorescence Telescope views, (few km distances), by the fast fluorescence flashing of horizontal up-going τ Air-showers.