Results 141 to 150 of about 186,144 (251)

Angular Power Spectrum of TeV–PeV Cosmic-Ray Anisotropies

open access: yesThe Astrophysical Journal
Simulations of the cosmic-ray (CR) anisotropy down to TeV energies are presented, using turbulence parameters consistent with those inferred from observations of the interstellar medium.
Wenyi Bian   +2 more
doaj   +1 more source

SAS-2 observations of the galactic gamma radiation from the Vela region [PDF]

open access: yes
Data from a scan of the galactic plane by the SAS-2 high energy gamma ray experiment in the region 250 deg l2 290 deg show a statistically-significant excess over the general radiation from the galactic plane for gamma radiation of energy 100 MeV in ...
Bignami, G. F.   +3 more
core   +1 more source

Advancing Precision Particle Background Estimation for Future X-Ray Missions: Correlated Variability between the Alpha Magnetic Spectrometer and Chandra/XMM-Newton

open access: yesThe Astrophysical Journal
Galactic cosmic-ray (GCR) particles have a significant impact on the particle-induced background of X-ray observatories, and their flux exhibits substantial temporal variability, potentially influencing background levels.
Arnab Sarkar   +11 more
doaj   +1 more source

Note on the Origin of the Highest Energy Cosmic Rays [PDF]

open access: yes, 2000
In this note we argue that the galactic model chosen by E.-J. Ahn, G. Medina-Tanco, P.L. Bierman and T. Stanev in their paper discussing the origin of the highest energy cosmic rays, is alone responsible for the focussing of positive particles towards ...
Billoir, Pierre   +1 more
core   +2 more sources

Overestimation of Astrophysical Gamma-Ray Energies during Thunderstorms: Synergy of Galactic and Atmospheric Accelerators

open access: yesThe Astrophysical Journal Letters
Particle accelerators abound in space plasmas, saturating the cosmos with fully stripped nuclei and gamma rays, with energies surpassing the capabilities of human-made accelerators by orders of magnitude. Upon reaching Earth’s atmosphere, these particles
A. Chilingarian, M. Zazyan
doaj   +1 more source

Search for Joint Multimessenger Signals from Potential Galactic Cosmic-Ray Accelerators with HAWC and IceCube

open access: yesThe Astrophysical Journal
The origin of high-energy galactic cosmic rays is yet to be understood, but some galactic cosmic-ray accelerators can accelerate cosmic rays up to PeV energies.
R. Alfaro   +495 more
doaj   +1 more source

Cosmogenic nuclei [PDF]

open access: yes
Cosmogenic nuclei, nuclides formed by nuclear interactions of galactic and solar cosmic rays with extraterrestrial or terrestrial matter are discussed. Long lived radioactive cosmogenic isotopes are focused upon.
Raisbeck, G. M.
core   +1 more source

Rigidity Dependence of the Long-term Galactic Cosmic Ray Variation by AMS-02

open access: yesThe Astrophysical Journal
Using measurements from the Alpha Magnetic Spectrometer (AMS-02) aboard the International Space Station, we have examined the long-term variations in galactic cosmic ray (GCR) proton fluxes in 2011–2018.
R. Modzelewska   +6 more
doaj   +1 more source

Progress report on the Heavy Ions in Space (HIIS) experiment [PDF]

open access: yes
One of the objectives of the Heavy Ions In Space (HIIS) experiment is to investigate heavy ions which appear at Long Duration Exposure Facility (LDEF) below the geomagnetic cutoff for fully-ionized galactic cosmic rays.
Adams, James H., Jr.   +3 more
core   +1 more source

Home - About - Disclaimer - Privacy