Michael Kachelrieß

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The Earth matter effects on supernova (SN) neutrinos can be identified at a single detector through peaks in the Fourier transform of their “inverse energy” spectrum. The positions of these peaks are independent of the SN models and therefore the peaks can be used as a robust signature of the Earth matter effects, which in turn can distinguish between(More)
The two-point autocorrelation function of ultra-high energy cosmic ray (UHECR) arrival directions has a broad maximum around 25 degrees, combining the data with energies above 4 × 10 eV (in the HiRes energy scale) of the HiRes stereo, AGASA, Yakutsk and SUGAR experiments. This signal is not or only marginally present analyzing events of a single experiment,(More)
Recent results have strongly confirmed that multiple supernovae happened at distances ~100 pc consisting of two main events: one at 1.7 to 3.2 million years ago, and the other at 6.5 to 8.7 million years ago. These events are said to be responsible for excavating the Local Bubble in the interstellar medium and depositing Fe on Earth and the Moon. Other(More)
We study the influence of the regular component of the Galactic magnetic field (GMF) on the arrival directions of ultra-high energy cosmic rays (UHECRs). We find that deflections in the GMF cannot be neglected even for E = 10 eV protons, especially for trajectories along the Galactic plane or crossing the Galactic center region. Thus the GMF could be used(More)
Michael Kachelrieß, Dmitry V. Semikoz and Maria A. Tortola Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, D–80805 München, Germany b Institute for Nuclear Research of the Academy of Sciences of Russia, Moscow, 117312, Russia c Instituto de Fisica Corpuscular C.S.I.C., Universitat de Valencia, Edificio Institutos de Paterna,(More)
The energy spectrum of ultra-high energy cosmic rays (UHECR) is usually calculated for sources with identical properties. Assuming that all sources can accelerate UHECR protons to the same extremely high maximal energy Emax > 10 20 eV and have the steeply falling injection spectrum 1/E, one can reproduce the measured cosmic ray flux above E >∼ 10 18 eV. We(More)
We reconsider the impact of ν̄e ↔ ν̄μ,τ neutrino oscillations on the observed ν̄e signal of supernova SN 1987A. Performing a maximum-likelihood analysis using as fit parameters the released binding energy Eb and the average neutrino energy 〈Eν̄e〉, we find as previous analyses that ν̄e ↔ ν̄μ,τ oscillations with large mixing angles have lower best-fit values(More)
The status of solutions to the ultra-high energy cosmic ray puzzle that involve particle physics beyond the standard model is reviewed. Signatures and experimental constraints are discussed for most proposals like the Z burst model and topological defects (both allowed only as subdominant contribution), supermassive dark matter (no positive evidence from(More)