Results 131 to 140 of about 61,814 (221)

Secondary antiprotons - A valuable cosmic-ray probe

open access: yesThe Astrophysical Journal, 1977
Even in the absence of antiprotons in the primary cosmic rays, a flux of secondary antiprotons will be produced in collisions between cosmic rays and interstellar gas. The predicted antiproton fraction increases with increasing cosmic-ray confinement, so that observations of antiprotons will provide a probe of models of cosmic-ray confinement.
openaire   +1 more source

Cosmic-Ray Spectra and Metal Budget Regulated by the Galactic Wind

open access: yesThe Astrophysical Journal
We study the advection effect of the galactic wind on the local cosmic-ray (CR) spectra. The spectral hardening from a few hundred GV and softening from a few TV are reproduced by a velocity profile with a maximum velocity of ∼700 km s ^−1 without ...
Yusaku Fukumoto   +2 more
doaj   +1 more source

Scaler Rates from the Pierre Auger Observatory: A New Proxy of Solar Activity

open access: yesThe Astrophysical Journal
The modulation of low-energy galactic cosmic rays reflects interplanetary magnetic field variations and can provide useful information on solar activity.
The Pierre Auger Collaboration   +364 more
doaj   +1 more source

Secondary Accceleration of Cosmic Rays by Supernova Shocks

open access: yes, 1997
4 page latex file. Complete uuencoded compressed PS file is also available at ftp://saba.fiz.huji.ac.il/pub/wandel/cr_icrc.uu or at http://shum.cc.huji.ac.il/~amri/papers/cr_icrc(tex,ps) In the procceeding of the 25th ICRC, v.4 p ...
openaire   +2 more sources

Secondary cosmic ray nuclei in the light of the Single Source Model

open access: yes, 2016
Evidence for a local 'Single Source' of cosmic rays is amassing by way of the recent precise measurements of various cosmic ray energy spectra from the AMS-02 instrument. To observations of individual cosmic ray nuclei, electrons, positrons and antiprotons must now be added the determination of the boron-to-carbon ratio and the energy spectrum of ...
Erlykin, Anatoly, Wolfendale, Arnold
openaire   +3 more sources

Cosmogenic Origin of KM3-230213A: Delayed Gamma-Ray Emission from a Cosmic-Ray Transient

open access: yesThe Astrophysical Journal Letters
The highest-energy cosmic neutrino detected by the ARCA detector of KM3NeT has reignited the quest to pinpoint the sources of ultrahigh-energy cosmic rays (UHECRs; E  ≳ 0.1 EeV).
Sovan Boxi, Saikat Das, Nayantara Gupta
doaj   +1 more source

Neural networks for separation of cosmic gamma rays and hadronic cosmic rays in air shower observation with a large area surface detector array

open access: yesMachine Learning: Science and Technology
The Tibet AS γ experiment has been observing cosmic gamma rays and cosmic rays in the energy range from teraelectron volts to several tens of petaelectron volts with a surface detector array since 1990.
Sousuke Okukawa   +10 more
doaj   +1 more source

An In-depth Study of Gamma Rays from the Starburst Galaxy M82 with VERITAS

open access: yesThe Astrophysical Journal
Assuming Galactic cosmic rays originate in supernovae and the winds of massive stars, starburst galaxies should produce very-high-energy (VHE; E  > 100 GeV) gamma-ray emission via the interaction of their copious quantities of cosmic rays with the large ...
A. Acharyya   +65 more
doaj   +1 more source

Cosmic Rays and the Askaryan Effect Reveal Subsurface Structure and Buried Ice on the Moon

open access: yesGeophysical Research Letters
We present the first full‐wavelength numerical simulations of the electric field generated by cosmic ray impacts into the Moon. Billions of cosmic rays fall onto the Moon every year.
E. S. Costello   +12 more
doaj   +1 more source

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