Since 2012 August Voyager 1 has been observing the local interstellar energy spectra of Galactic cosmic-ray nuclei down to 3MeV nuc and electrons down to 2.7 MeV. The H and He spectra have the same energy dependence between 3 and 346MeV nuc, with a broad maximum in the 10–50MeV nuc range and a H/He ratio of 12.2 ± 0.9. The peak H intensity is ∼15 times that observed at 1 AU, and the observed lo...

The arriving abundances of a variety of cosmic-ray nuclides consist of comparable amounts of primary material produced by stellar nucleosynthesis and secondary matter resulting from fragmentation of heavier nuclei by collisions during interstellar propagation. We discuss a technique for extracting the primary and secondary contributions that takes advantage of energy spectra of individual nucli...

We have made a new calculation of the cosmic-ray secondary positron spectrum using a diffusive halo model for Galactic cosmic-ray propagation. The code computes self-consistently the spectra of primary and secondary nucleons, primary electrons, and secondary positrons and electrons. The models are first adjusted to agree with the observed cosmic-ray Boron/Carbon ratio, and the interstellar prot...

We study the survival of ultrahigh energy nuclei injected in clusters of galaxies, as well as their secondary neutrino and photon emissions, using a complete numerical propagation method and a realistic modeling of the magnetic, baryonic and photonic backgrounds. It is found that the survival of heavy nuclei highly depends on the injection position and on the profile of the magnetic field. Taki...

The Trans-Iron Galactic Element Recorder (TIGER) was launched in December 2001 and 2003 from McMurdo, Antarctica and was designed to observe elements ranging from 14 ≤ Z ≤ 40 over an extended energy range. Observations of radioactive isotopes produced during explosive nucleosynthesis such as Ni that decay only through electron capture provide important constraints on the delay between nucleosyn...

A simple model of a homogeneous population of cosmic accelerators injecting protons following a unique power law has long been shown to fit the HiRes monocular data very well. The model evolves the sources with redshift and adjusts both the redshift evolution and the exponent in the injecting power law to fit the data. At lower energies galactic iron is added in as suggested by composition meas...

The amplitude and phase of the cosmic ray anisotropy are well established experimentally between 10 eV and 10 eV. The study of their evolution into the energy region 10 − 10 eV can provide a significant tool for the understanding of the steepening (“knee”) of the primary spectrum. In this letter we extend the EAS-TOP measurement performed at E0 ≈ 10 14 eV, to higher energies by using the full d...