Results 171 to 180 of about 126,463 (267)

1 Cosmic rays: extragalactic and Galactic

, 2014
From the analysis of the flux of high energy particles, E> 3 · 1018eV, it is shown that the distribution of the power density of extragalactic rays over en-ergy is of the power law, q̄(E) ∝ E−2.7, with the same index of 2.7 that has the distribution ...
Ya. N. Istomina B
core  

Raios cósmicos e a heliosfera

Revista Brasileira de Ensino de Física
Este texto sintetiza a modulação pelas partículas do fluxo de raios cósmicos galáticos durante seu transporte na heliosfera, fornecendo algumas referências necessárias para a compreensão do assunto aos interessados no tema.
A.G. Izzo de Oliveira, M. Rockenbach, A.A. Pacini   +2 more
doaj   +1 more source

On the Propagation of Galactic Cosmic Rays

, 2017
Recent observations of cosmic ray composition imply that the average amount of interstellar matter traversed by the cosmic rays before escaping from the Galaxy decreases as their energy increases.
Holmes, J. A.
core   +1 more source

Astrophysics of galactic cosmic rays

, 2004
The Galactic Cosmic Rays contain a sample of matter from elsewhere in the galaxy. It is a relatively recent sample (∼ 107 years old) and contains information on the source material and conditions of confinement and transport in the galaxy. Unraveling the
Wefel, John P.
core  

The Correspondence between Leaky-box and Diffusion Models of Cosmic-Ray Propagation

The Astrophysical Journal
The leaky-box model and the attendant concept of path-length distribution of cosmic rays were invented in the mid-1960s. Even though versatile computational packages such as GALPROP and DRAGON with the diffusion approach are now available for analyzing ...
Ramanath Cowsik, Dawson Huth
doaj   +1 more source

Detection of primary photons in high energy cosmic rays using Cherenkov imaging and surface detectors

, 2017
Discovered by Hess during some experiments about air ionization, cosmic rays are constituted by particles coming from the space. In the past, cosmic rays allowed the development of Particle Physics; indeed, thanks to their high energy not achievable in ...
CASABURO, FAUSTO
core  

Impact of Anisotropic Cosmic-Ray Transport on the Gamma-Ray Signatures in the Galactic Center

The Astrophysical Journal
The very high energy (VHE) emission of the central molecular zone (CMZ) is rarely modeled in 3D. Most approaches describe the morphology in 1D or simplify the diffusion to the isotropic case.
J. Dörner, J. Becker Tjus, P. S. Blomenkamp, H. Fichtner, A. Franckowiak, E. M. Zaninger   +5 more
doaj   +1 more source

Role of sulphuric acid, ammonia and galactic cosmic rays in atmospheric aerosol nucleation

Nature, 2011
J. Kirkby, J. Curtius, J. Almeida, E. Dunne, J. Duplissy, S. Ehrhart, A. Franchin, S. Gagné, L. Ickes, A. Kürten, A. Kupc, A. Metzger, F. Riccobono, L. Rondo, S. Schobesberger, G. Tsagkogeorgas, D. Wimmer, A. Amorim, Federico Bianchi, M. Breitenlechner, A. David, J. Dommen, Andrew J. Downard, M. Ehn, R. Flagan, S. Haider, A. Hansel, D. Hauser, W. Jud, H. Junninen, F. Kreissl, A. Kvashin, A. Laaksonen, K. Lehtipalo, J. Lima, E. Lovejoy, V. Makhmutov, S. Mathot, J. Mikkilä, P. Minginette, S. Mogo, T. Nieminen, A. Onnela, P. Pereira, T. Petäjä, R. Schnitzhofer, J. Seinfeld, M. Sipilä, Y. Stozhkov, F. Stratmann, A. Tomé, J. Vanhanen, Y. Viisanen, A. Vrtala, P. Wagner, H. Walther, E. Weingartner, H. Wex, P. Winkler, K. Carslaw, D. Worsnop, U. Baltensperger, M. Kulmala   +62 more
semanticscholar   +1 more source

Galactic  -rays and Cosmic Ray Origin [PDF]

Monthly Notices of the Royal Astronomical Society, 1975
D. Dodds, A. W. Strong, A. W. Wolfendale
openaire   +1 more source

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

Annales Geophysicae
The fluxes of anomalous oxygen (<i>E</i> 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
M. K. Reuss, M. Fränz, E. Keppler
doaj