Results 51 to 60 of about 126,463 (267)

Transition from Galactic to extragalactic cosmic rays and cosmic ray anisotropy

EPJ Web of Conferences, 2013
This talk based on results of ref. [1], where we constrain the energy at which the transition from Galactic to extragalactic cosmic rays occurs by computing the anisotropy at Earth of cosmic rays emitted by Galactic sources.
Sigl G., Semikoz D.V., Kachelrieß M., Giacinti G.   +3 more
doaj   +1 more source

Diffuse Cosmic Rays Shining in the Galactic Center: A Novel Interpretation of H.E.S.S. and Fermi-LAT γ-Ray Data. [PDF]

Physical Review Letters, 2017
We present a novel interpretation of the γ-ray diffuse emission measured by Fermi-LAT and H.E.S.S. in the Galactic center (GC) region and the Galactic ridge (GR).
D. Gaggero, D. Grasso, A. Marinelli, M. Taoso, A. Urbano   +4 more
semanticscholar   +1 more source

Anisotropy and Corotation of Galactic Cosmic Rays [PDF]

Science, 2006
The intensity of Galactic cosmic rays is nearly isotropic because of the influence of magnetic fields in the Milky Way. Here, we present two-dimensional high-precision anisotropy measurement for energies from a few to several hundred teraelectronvolts (TeV), using the large data sample of the Tibet Air Shower Arrays.
M, Amenomori, S, Ayabe, X J, Bi, D, Chen, S W, Cui, , Danzengluobu, L K, Ding, X H, Ding, C F, Feng, Zhaoyang, Feng, Z Y, Feng, X Y, Gao, Q X, Geng, H W, Guo, H H, He, M, He, K, Hibino, N, Hotta, Haibing, Hu, H B, Hu, J, Huang, Q, Huang, H Y, Jia, F, Kajino, K, Kasahara, Y, Katayose, C, Kato, K, Kawata, , Labaciren, G M, Le, A F, Li, J Y, Li, Y-Q, Lou, H, Lu, S L, Lu, X R, Meng, K, Mizutani, J, Mu, K, Munakata, A, Nagai, H, Nanjo, M, Nishizawa, M, Ohnishi, I, Ohta, H, Onuma, T, Ouchi, S, Ozawa, J R, Ren, T, Saito, T Y, Saito, M, Sakata, T K, Sako, T, Sasaki, M, Shibata, A, Shiomi, T, Shirai, H, Sugimoto, M, Takita, Y H, Tan, N, Tateyama, S, Torii, H, Tsuchiya, S, Udo, B, Wang, H, Wang, X, Wang, Y G, Wang, H R, Wu, L, Xue, Y, Yamamoto, C T, Yan, X C, Yang, S, Yasue, Z H, Ye, G C, Yu, A F, Yuan, T, Yuda, H M, Zhang, J L, Zhang, N J, Zhang, X Y, Zhang, Y, Zhang, Yi, Zhang, , Zhaxisangzhu, X X, Zhou   +84 more
openaire   +3 more sources

Extragalactic and galactic sources: New evidence, new challenges, new opportunities

EPJ Web of Conferences, 2013
Recent data bring in sharper focus the issue of relative contributions of galactic and extragalactic sources of ultrahigh-energy cosmic rays. On the one hand, there is some new evidence, from gamma-ray observations of blazars, that cosmic rays are ...
Kusenko Alexander
doaj   +1 more source

Giant Molecular Clouds as probes of of Galactic Cosmic Rays with Fermi-LAT [PDF]

EPJ Web of Conferences, 2019
Direct measurements of Cosmic Rays (CRs) can not extend much further than the Solar System. In order to probe the so-called “sea” of Galactic Cosmic Rays, one should rely on secondary emission.
Peron Giada, Aharonian Felix, Casanova Sabrina, Yang Ruizhi, Zanin Roberta   +4 more
doaj   +1 more source

Observation of New Properties of Secondary Cosmic Rays Lithium, Beryllium, and Boron by the Alpha Magnetic Spectrometer on the International Space Station [PDF]

, 2019
We report on the observation of new properties of secondary cosmic rays Li, Be, and B measured in the rigidity (momentum per unit charge) range 1.9 GV to 3.3 TV with a total of $5.4 \times 10^6$ nuclei collected by AMS during the first five years of ...
AMS collaboration (254 authors), Arruda, L., Orcinha, M., Barao, F.   +3 more
core   +1 more source

COSMIC RAY PROPAGATION IN GALACTIC TURBULENCE [PDF]

The Astrophysical Journal, 2014
We revisit propagation of galactic cosmic rays (CRs) in light of recent advances in CR diffusion theory in realistic interstellar turbulence. We use a tested model of turbulence in which it has been shown that fast modes dominate scattering of CRs. As a result, propagation becomes inhomogeneous and environment dependent.
Evoli, Carmelo, Yan, Huirong
openaire   +2 more sources

Recurrent variations of anomalous oxygen in association with a corotating interaction region [PDF]

Annales Geophysicae, 1996
The fluxes of anomalous oxygen (E ranging from 3.5-6.8 MeV/amu), as measured by the EPAC instrument on ULYSSES, show a recurrent variation with the solar rotation period, which is anticorrelated with the fluxes of particles accelerated at the shocks ...
M. K. Reuss, M. Fränz, E. Keppler
doaj   +1 more source

GALACTIC AND EXTRAGALACTIC SUPERNOVA REMNANTS AS SITES OF PARTICLE ACCELERATION

Acta Polytechnica, 2013
Supernova remnants, owing to their strong shock waves, are likely sources of Galactic cosmic rays. Studies of supernova remnants in X-rays and gamma rays provide us with new insights into the acceleration of particles to high energies. This paper reviews
Manami Sasaki
doaj   +1 more source

Reacceleration of Galactic Cosmic Rays beyond the Knee at the Termination Shock of a Cosmic-Ray-driven Galactic Wind

The Astrophysical Journal, 2023
Abstract The origin of cosmic rays (CRs) above the knee in the spectrum is an unsolved problem. We present a wind model in which interstellar gas flows along a nonrotating, expanding flux tube with a changing speed and cross-sectional area.
Payel Mukhopadhyay, Enrico Peretti, Noémie Globus, Paul Simeon, Roger Blandford   +4 more
openaire   +4 more sources