It is believed that the upper limit of cosmic-ray
energy is limited by a threshold of 5 x [10.sup.19] eV, because cosmic ray particles interact energetically with relic radiation, which leads to their absorption and reduction of their energy to a threshold value at distances of the order of several tens of megaparsecs (Greisen-Zatsepin-Kuzmin effect) [2,3].
Here, we wish to focus our attention on the important interplay between particle DM signatures and the background signals expected from astrophysics, discussing in particular the phenomenological relevance of cosmic-ray
This isotope forms when cosmic rays smash apart atmospheric oxygen and nitrogen nuclei, so Earth must have undergone increased cosmic-ray
bombardment when this layer of ice was deposited....
Some 60Fe in the debris from the destroyed star is accelerated to cosmic-ray
speed when another nearby massive star in the cluster explodes and its shock wave collides with the remnants of the earlier stellar explosion.
The project will also foster critical and significant training to high-skilled personnel on the use of cosmic-ray
soil moisture techniques in the UK.
London, Apr 10 ( ANI ): NASA has revealed that the bright light that features in a photo from the surface of Mars taken by its Curiosity rover is not some kind of luminous alien, but it is "likely a glinting rock or cosmic-ray
ICRR installed its first x86 cluster system in January 1991 as a collaborative research environment for multiple projects in the field of particle physics and cosmic-ray
research, conducted primarily by the University of Tokyo.
Bazilevskaya et al., "PAMELA measurements of cosmic-ray
proton and helium spectra," Science, vol.
Role of the sun's nonaxisymmetric open flux in cosmic-ray
Galactic pions can be generated only by cosmic-ray
collisions, so this peak would offer compelling proof, Dermer said.
The discovery was made using cosmic-ray
imaging, a technique that uses subatomic particles to create a 3-D image of a structure.
To this end, we will study cosmic-ray
propagation in magneto-hydrodynamic turbulence and improve the modeling of the plasma physics.