Conveners
Cosmic Rays, Gamma Rays
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Cosmic Rays, Gamma Rays
- Francesco Longo (Istituto Nazionale di Fisica Nucleare)
Cosmic Rays, Gamma Rays
- There are no conveners in this block
Cosmic Rays, Gamma Rays
- Zhen Cao
The Cherenkov Telescope Array (CTA) will be five to ten times more sensitive depending on energy with respect to current generation Imaging Cherenkov Telescopes and will have unprecedented accuracy in its detection of very-high-energy gamma rays in the energy range from 20 GeV to 300 TeV. CTA is designed to detect gamma rays over a larger area with dozens of telescopes located on the Canary...
Direct measurements of cosmic rays in space have been extensively performed since the sixties by experiments on board stratospheric balloons, satellites and space stations. The main goals have been the search for primordial antimatter, signals of dark matter annihilation or of exotic particles, and the study of the mechanisms of production, acceleration and propagation of cosmic rays.
In...
The DArk Matter Particle Explorer (DAMPE) is a satellite launched in December 2015. Its primary scientific goals include the study of Galactic Cosmic-Rays (GCR) up to hundreds of TeV. Even higher energies could be reached by the High Energy cosmic Radiation Detector (HERD) that is planned to be installed onboard the Chinese Space Station (CSS) in 2027, aiming to detect CR up to a few PeV...
High-elevation particle detectors have recently opened-up a new observational window in Astronomy, significantly increasing the number of detected gamma-ray sources in the very- to ultra-high energy range. In particular, these instruments have achieved unprecedented sensitivity above 100 TeV and detected gamma ray emission from sources up to 1 PeV. The recent successes have all been obtained...
In this contribution I will present recent observational results on cosmic rays at ultrahigh energies (UHECRs) from the Telescope Array and the Pierre Auger Observatory. These results include the spectrum and composition of UHECRs, anisotropies of their arrival directions and hadronic interactions in air showers.
High-energy cosmic rays impinging on the atmosphere of the Earth initiate extensive air showers. The electrons and positrons in the shower interact with the Earth magnetic field, this yields to the emission of electromagnetic waves with frequencies of tens of MHz. Antenna ground arrays are used to record the radio emission and reconstruct the properties of cosmic rays, such as arrival...
Since its discovery more than hundred years ago, the origin of the cosmic-ray (CR) flux measured on Earth is still unknown. To explain the energy region up the knee, located at few PeV, supernova remnants (SNRs) are usually addressed as main CR accelerators. Despite experimental efforts devoted to the identification of PeV activity in SNRs through radiative signatures at the highest energies,...
After a brief review of the status of ultrahigh-energy cosmic ray (UHECR) physics. I discuss observational and theoretical constraints on the sources of UHECRs. I comment also briefly on the role of magnetic fields. Then I discuss a recent analysis of radio galaxies as the dominant extragalactic UHECR sources. In particular, I argue that scenarios where few local sources like Fornax A and...
