Results 21 to 30 of about 61,814 (221)
Abundances of the cosmic ray β-decay secondaries and implications for cosmic ray transport [PDF]
AIP Conference Proceedings, 2000 Galactic cosmic rays (GCRs) pass through the interstellar medium (ISM) and undergo nuclear interactions that produce secondary fragments. The abundances of radioactive secondary species can be used to derive a galactic confinement time for cosmic rays using the amount of ISM material traversed by the cosmic rays inferred from stable GCR secondary ...
Yanasak, N. +13 more
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Observation of Properties of Primary and Secondary Cosmic Rays by the Alpha Magnetic Spectrometer on the International Space Station [PDF]
EPJ Web of Conferences, 2019 The Alpha Magnetic Spectrometer (AMS-02) is a wide acceptance high-energy physics experiment installed on the International Space Station in May 2011 and operating continuously since then.
Oliva Alberto
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Gamma-Ray Cosmology and Tests of Fundamental Physics
Galaxies, 2022 The propagation of gamma-rays over cosmological distances is the subject of extensive theoretical and observational research at GeV and TeV energies. The mean free path of gamma-rays in the cosmic web is limited above 100 GeV due to the production of ...
Jonathan Biteau, Manuel Meyer
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SECONDARY PRODUCTION AS THE ORIGIN OF THE COSMIC-RAY POSITRON EXCESS [PDF]
The Astrophysical Journal, 2016 ABSTRACT The Alpha Magnetic Spectrometer has released high-precision data for cosmic rays, and has verified an excess of positrons relative to expectations from cosmic-ray interactions in the interstellar medium. An exciting and well-known possibility for the excess is production of electron–positron pairs by annihilating dark matter ...
M. Kruskal, S. P. Ahlen, G. Tarlé
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Propagation of Cosmic Rays and their Secondaries in the Intracluster Medium [PDF]
Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019), 2019 We present results of the propagation of high-energy cosmic rays (CRs) in the intracluster medium (ICM). To this end, we employ three-dimensional cosmological magnetohydrodynamical simulations of the turbulent intergalactic medium to explore the propagation of CRs with energies between $10^{14}$ and $10^{19}$ eV.
Saqib Hussain +2 more
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Production of atomic hydrogen by cosmic rays in dark clouds [PDF]
, 2018 The presence of small amounts of atomic hydrogen, detected as absorption dips in the 21 cm line spectrum, is a well-known characteristic of dark clouds.
Caselli, Paola +4 more
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Cosmic-Ray Deuterium and HELIUM-3 of Secondary Origin and the Residual Modulation of Cosmic Rays [PDF]
The Astrophysical Journal, 1969 Deuterium and helium 3 produced by nuclear interactions of cosmic rays with interstellar ...
Reuven Ramaty, Richard E. Lingenfelter
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Estimated equivalent radiation dose at different altitudes in Earth’s atmosphere
Solar-Terrestrial Physics, 2022 The paper reports the results of simulation of cosmic ray proton transport through Earth’s atmosphere. The main objective of this work is to obtain characteristics of secondary particle fluxes at different altitudes and to convert them to equivalent dose
Maurchev E. A. +4 more
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Possible Counterpart Signal of the Fermi Bubbles at the Cosmic-Ray Positrons
The Astrophysical Journal, 2023 The inner Galaxy has hosted cosmic-ray burst events, including those responsible for the gamma-ray Fermi bubbles and the eROSITA bubbles in X-rays. In this work, we study the Alpha Magnetic Spectrometer positron fraction and find three features around 12,
Ilias Cholis, Iason Krommydas
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The Astrophysical Journal, 2023 Multi-messenger anomalies, including spectral hardening or excess of nuclei, leptons, ratios of $\bar{p}/p$ and B/C, and anisotropic reversal, have been observed in past years.
Bing-Qiang Qiao +3 more
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