Results 51 to 60 of about 260,461 (223)
Cosmic Rays in Superbubbles [PDF]
The Astrophysical Journal, 2019 Abstract A solution of the transport equation for cosmic rays in turbulent magnetic fields in a spherically symmetric geometry is presented. The results are applied to particle propagation in superbubbles. In the fully analytical calculation, various energy-loss processes are considered.
T. Tolksdorf +3 more
openaire +2 more sources
Monitoring and forecasting of great radiation hazards for spacecraft and aircrafts by online cosmic ray data [PDF]
Annales Geophysicae, 2005 We show that an exact forecast of great radiation hazard in space, in the magnetosphere, in the atmosphere and on the ground can be made by using high-energy particles (few GeV/nucleon and higher) whose transportation from the Sun is characterized by ...
L. I. Dorman, L. I. Dorman
doaj +1 more source
Impact of Fermi-LAT and AMS-02 results on cosmic-ray astrophysics
, 2015 This article reviews a few topics relevant to Galactic cosmic-ray astrophysics, focusing on the recent AMS-02 data release and Fermi Large Area Telescope data on the diffuse Galactic gamma-ray emissivity.
Dermer, Charles D.
core +2 more sources
The Density Spike in Cosmic-Ray-Modified Shocks: Formation, Evolution, and Instability [PDF]
, 1996 We examine the formation and evolution of the density enhancement (density spike) that appears downstream of strong, cosmic-ray-modified shocks. This feature results from temporary overcompression of the flow by the combined cosmic-ray shock precursor ...
Axford W. I. +12 more
core +3 more sources
Energy Budget in the High Energy Universe, 2007 Several kinds of measurements are combined in an attempt to obtain a consistent estimate of the spectrum and composition of the primary cosmic radiation through the knee region. Assuming that the knee is a signal of the high-energy end of a galactic cosmic-ray population, I discuss possible signatures of a transition to an extra-galactic population and
openaire +3 more sources
Atmosphere, 2021 It is well known that the various manifestations of space weather can influence a wide range of human activities, from technological systems to human health. Various earlier, as well as more recent multi-disciplinary heliobiological and biometeorological
Helen Mavromichalaki +4 more
doaj +1 more source
Molecular Clouds as Cosmic Ray Laboratories
, 2011 We will here discuss how the gamma-ray emission from molecular clouds can be used to probe the cosmic ray flux in distant regions of the Galaxy and to constrain the highly unknown cosmic ray diffusion coefficient. In particular we will discuss the GeV to
Aharonian, Felix A. +11 more
core +1 more source
Method to extract the primary cosmic ray spectrum from very high energy gamma-ray data and its application to SNR RX J1713.7-3946 [PDF]
, 2007 Supernova remnants are likely to be the accelerators of the galactic cosmic rays. Assuming the correctness of this hypothesis, we develop a method to extract the parent cosmic ray spectrum from the VHE gamma ray flux emitted by supernova remnants (and ...
F. L. Villante +7 more
core +1 more source
Particles, Strings and Cosmology (PASCOS 99), 2000 Cosmic ray antiprotons have been detected for over 20 years and are now measured reliably. Standard particle and astrophysics predict a conventional spectrum and abundance of secondary antiprotons consistent with all current measurements. These measurements place limits on exotic Galactic antiproton sources and non-standard antiproton properties ...
openaire +3 more sources
The Astrophysical Journal LettersMotivated by the difference between the fluxes of sub-PeV Galactic diffuse gamma-ray emission (GDE) measured by the Tibet AS γ experiment and the LHAASO collaboration, our study constrains the contribution to the GDE flux measured by Tibet AS γ from the ...
S. Kato +15 more
doaj +1 more source