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Grammage of cosmic rays around Galactic supernova remnants
Marta D'Angelo, Pasquale Blasi, Elena Amato
The residence time of cosmic rays (CRs) in the Galaxy is usually inferred from the measurement of the ratio of secondary-to-primary nuclei, such as the boron (B)/carbon (C) ratio,…
High energy cosmic ray self-confinement close to extragalactic sources
P. Blasi, E. Amato, M. D'Angelo
The ultra-high energy cosmic rays observed at the Earth are most likely accelerated in extra-galactic sources. For the typical luminosities invoked for such sources, the electric c…
On the cosmic ray spectrum from type II Supernovae
Martina Cardillo, Elena Amato, Pasquale Blasi
One of the most important challenges for the largely accepted idea that Galactic CRs are accelerated in SNR shocks is the maximum energy at which particles can be accelerated. The…
On the cosmic ray spectrum from type II Supernovae expanding in their red giant presupernova wind
Martina Cardillo, Elena Amato, Pasquale Blasi
While from the energetic point of view SNRs are viable sources of Galactic CRs, the issue of whether they can accelerate protons up to PeV remains unsolved. Here we discuss particl…
Particle acceleration and radiation in Pulsar Wind Nebulae
Elena Amato
Pulsar Wind Nebulae are the astrophysical sources that host the most relativistic shocks in Nature and the only Galactic sources in which we have direct evidence of PeV particles.…
Particle Acceleration in Astrophysical Sources
Elena Amato
Astrophysical sources are extremely efficient accelerators. Some sources emit photons up to multi-TeV energies, a signature of the presence, within them, of particles with energies…
The fate of ultrahigh energy nuclei in the immediate environment of young fast-rotating pulsars
Kumiko Kotera, Elena Amato, Pasquale Blasi
Young, fast-rotating neutron stars are promising candidate sources for the production of ultrahigh energy cosmic rays (UHECRs). The interest in this model has recently been boosted…
Constraints on particle acceleration sites in the Crab Nebula from relativistic MHD simulations
Barbara Olmi, Luca Del Zanna, Elena Amato +1
The Crab Nebula is one of the most efficient accelerators in the Galaxy and the only galactic source showing direct evidence of PeV particles. In spite of this, the physical proces…