374 citations · 2.9k across the 46 of their papers we have counts for
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Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
The Pierre Auger Collaboration
Data collected by the Pierre Auger Observatory provide evidence for anisotropy in the arrival directions of the cosmic rays with the highest energies, which are correlated with the…
Mu-tau neutrino refraction and collective three-flavor transformations in supernovae
Andreu Esteban-Pretel, Sergio Pastor, Ricard Tomas +2
We study three-flavor collective neutrino transformations in the dense-neutrino region above the neutrino sphere of a supernova core. We find that two-flavor conversions driven by…
Lorentz Violation for Photons and Ultra-High Energy Cosmic Rays
Matteo Galaverni, Guenter Sigl
Lorentz symmetry breaking at very high energies may lead to photon dispersion relations of the form omega^2=k^2+xi_n k^2(k/M_Pl)^n with new terms suppressed by a power n of the Pla…
Decoherence in supernova neutrino transformations suppressed by deleptonization
Andreu Esteban-Pretel, Sergio Pastor, Ricard Tomas +2
In the dense-neutrino region at 50-400 km above the neutrino sphere in a supernova, neutrino-neutrino interactions cause large flavor transformations. We study when the multi-angle…
Stochastic Gravitational Wave Background from Cosmological Supernovae
Alessandra Buonanno, Guenter Sigl, Georg G. Raffelt +2
Based on new developments in the understanding of supernovae (SNe) as gravitational-wave (GW) sources we estimate the GW background from all cosmic SNe. For a broad range of freque…
Large Scale Magnetic Fields and the Number of Cosmic Ray Sources above 10^(19) eV
C. Isola, G. Sigl
We present numerical simulations for the two-point correlation function and the angular power spectrum of nucleons above 10^{19} injected by a discrete distribution of sources foll…
Annihilation Radiation from a Dark Matter Spike at the Galactic Centre
Gianfranco Bertone, Guenter Sigl, Joseph Silk
We study annihilation radiation of neutralinos in the Galactic centre, assuming the existence of a 'spike' in the dark matter density profile, due to adiabatic accretion onto the m…
Centaurus A as the Source of ultra-high energy cosmic rays?
C. Isola, M. Lemoine, G. Sigl
We present numerical simulations for energy spectra and angular distributions of nucleons above 10^{19} eV injected by the radio-galaxy Centaurus A at a distance 3.4 Mpc and propag…
Astrophysical Limits on Massive Dark Matter
G. Bertone, G. Sigl, J. Silk
Annihilations of weakly interacting dark matter particles provide an important signature for the possibility of indirect detection of dark matter in galaxy halos. These self-annihi…
A Fresh Look at Axions and SN 1987A
Wolfgang Keil, Hans-Thomas Janka, David N. Schramm +3
We re-examine the very stringent limits on the axion mass based on the strength and duration of the neutrino signal from SN 1987A, in the light of new measurements of the axial-vec…
Monopole Annihilation and Highest Energy Cosmic Rays
P. Bhattacharjee, G. Sigl
Cosmic rays with energies exceeding $10^{20}\eV$ have been detected. The origin of these highest energy cosmic rays remains unknown. Established astrophysical acceleration mechanis…