Measurements of cosmic rays in past decades have revealed a break around 1 PeV in the energy spectrum, which is called the "knee" of the cosmic ray energy spectrum due to its shape resembling a knee joint. However, the origin of cosmic rays in the "knee" region is still an unsolved mys...
cosmic-rays; re-acceleration; supernova remnants; stellar wind1. Introduction Cosmic Ray (CR) particles are mainly protons (90%) and nuclei with a spectrum that extends over 15 orders of magnitude in energy (𝐸=[1010÷1020]E=[1010÷1020] eV). Such a large energy range can be explained...
Holes in helmets of Apollo 12 astronauts caused by high energy cosmic rays. The holes have been made visible in a microscope by etching.(From New Scientist, April 22, 1973.) The discovery of π-mesons (or pions) was reported by Powell and Occhialini in 1948 after they had analyzed ...
内容提示: Monitoring the daily variation of Sun-Earth magnetic f i elds usinggalactic cosmic raysThe LHAASO Collaboration 1, **Correspondence: nanyc@ihep.ac.cn (Y.N.); chensz@ihep.ac.cn (S.C.); fengcf@sdu.edu.cn (C.F.)Received: April 10, 2024; Accepted: September 3, 2024; ...
AnAuthor Correctionto this article was published on 06 April 2021 This article has beenupdated Abstract Cosmic rays with energies up to a few PeV are known to be accelerated within the Milky Way1,2. Traditionally, it has been presumed that supernova remnants were the main source of these ver...
Injection of solar cosmic rays in the ground level event of April 15, 2001PetukhovaA. S.PetukhovI. S.S. I.BULLETIN- RUSSIAN ACADEMY OF SCIENCES C/C OF IZVESTIIA- ROSSIISKAIA AKADEMIIA NAUK SERIIA FIZICHESKAIA
THE origin and propagation of cosmic rays have been intriguing physicists ever since their discovery in 1912. The main obstacle to identifying the sources of charged particles is the galactic magnetic field. Since the Larmor radii for protons in a typical interstellar field of 3 µgauss are belo...
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Box 9010, 6500 GL Nijmegen, The NetherlandsApril 4, 2009AbstractThis review summarizes recent developments in the understanding of high-energy cosmicrays. It focuses on galactic and presumably extragalactic particles in the energy range fromthe knee (10 15 eV) up to the highest energies observed ...
Article 12 August 2024 The hunt for PeVatrons as the origin of the most energetic photons observed in the Galaxy Article 22 April 2024 References Weekes, T. C. et al. Observation of TeV gamma rays from the Crab nebula using the atmospheric Cerenkov imaging technique. Astrophys. J. 342...