Results 21 to 30 of about 181,166 (278)
Active Galactic Nuclei with Starbursts: Sources for Ultra High Energy Cosmic Rays [PDF]
, 2009 Ultra high energy cosmic ray events presently show a spectrum, which we interpret here as galactic cosmic rays due to a starburst in the radio galaxy Cen A pushed up in energy by the shock of a relativistic jet.
A. MELI +12 more
core +3 more sources
The origin of galactic cosmic rays [PDF]
, 2007 The origin of galactic cosmic rays is one of the most interesting unsolved problems in astroparticle physics. Experimentally, the problem is attacked by a multi-disciplinary effort, namely by direct measurements of cosmic rays above the atmosphere, by ...
Aharonian +54 more
core +3 more sources
On irregularities in the cosmic ray spectrum of \(10^{16}-10^{18}\) eV range
SciPost Physics Proceedings, 2023 Existing small, medium and large arrays for the study of cosmic rays of ultra-high energies are aimed for obtaining information about our galaxy and extragalactic space, namely to search and study astronomical objects that produce the flux of ...
Stanislav P. Knurenko, Igor S. Petrov
doaj +1 more source
Southern Hemisphere Observations of a $10^{18}$eV Cosmic Ray Source Near the Direction of the Galactic Centre [PDF]
, 2000 We report on an analysis of data from the southern hemisphere SUGAR cosmic ray detector. We confirm the existence of an excess of $10^{18}$eV cosmic rays from a direction close to the Galactic Centre, first reported by the AGASA group.
B.R. Dawson +11 more
core +2 more sources
New look on the origin of cosmic rays
EPJ Web of Conferences, 2017 From the analysis of the flux of high energy particles, E > 3 · 1018 eV, it is shown that the distribution of the power density of extragalactic rays over energy is of the power law, q̅(E) ∝ E−2.7, with the same index of 2.7 that has the distribution of ...
Istomin Ya.N.
doaj +2 more sources
Cosmic rays in early star-forming galaxies and their effects on the interstellar medium [PDF]
, 2017 Galaxies at high redshifts with strong star formation are sources of high-energy cosmic rays. These cosmic rays interact with the baryon and radiation fields of the galactic environment via photo-pair, photo-pion and proton-proton processes to produce ...
Jacobsen, Idunn B. +3 more
core +2 more sources
The GRAND project and GRANDProto300 experiment [PDF]
EPJ Web of Conferences, 2019 The Giant Array for Neutrino Detection (GRAND) is a proposal for a giant observatory of ultra-high energy cosmic particles (neutrinos, cosmic rays and gamma rays). It will be composed of twenty subarrays of 10 000 antennas each, totaling a detection area
Martineau-Huynh Olivier
doaj +1 more source
Deciphering the Dipole Anisotropy of Galactic Cosmic Rays. [PDF]
Physical Review Letters, 2016 Recent measurements of the dipole anisotropy in the arrival directions of Galactic cosmic rays (CRs) indicate a strong energy dependence of the dipole amplitude and phase in the TeV-PeV range.
M. Ahlers
semanticscholar +1 more source
Galactic diffuse gamma rays meet the PeV frontier [PDF]
Astronomy & Astrophysics, 2022 The Tibet AS$\gamma$ and LHAASO collaborations recently reported the observation of a $\gamma$-ray diffuse emission with energy up to the PeV from the Galactic plane.
P. D. Luque +6 more
semanticscholar +1 more source
Modulation of Galactic Cosmic Rays in the Inner Heliosphere over Solar Cycles [PDF]
, 2017 The 11- and 22-year modulation of galactic cosmic rays (GCRs) in the inner heliosphere is studied using a numerical model developed by Qin and Shen in 2017.
Z.-N. Shen, G. Qin
semanticscholar +1 more source