Results 161 to 170 of about 4,292,570 (358)
Cosmogenic neutrinos and ultra-high energy cosmic ray models [PDF]
, 2015 We use an updated version of SimProp, a Monte Carlo simulation scheme for the propagation of ultra-high energy cosmic rays, to compute cosmogenic neutrino fluxes expected on Earth in various scenarios.
R. Aloisio +5 more
semanticscholar +1 more source
Cosmic-ray protons, nuclei, electrons, and antiparticles under a two-halo scenario of diffusive propagation [PDF]
, 2015 We report calculations of cosmic-ray proton, nuclei, antiproton, electron and positron energy spectra within a "two-halo model" of diffusive transport.
N. Tomassetti
semanticscholar +1 more source
Elastic scattering in geometrical model
Physics Letters B, 2016 The experimental data on proton–proton elastic and inelastic scattering emerging from the measurements at the Large Hadron Collider, calls for an efficient model to fit the data.
Zbigniew Plebaniak, Tadeusz Wibig
doaj +1 more source
Journal of Physics G: Nuclear and Particle Physics, 2005 Searching for strangelets in cosmic rays may be the best way to test the possible stability of strange quark matter. I review calculations of the astrophysical strangelet flux in the GV--TV rigidity range, which will be investigated from the Alpha Magnetic Spectrometer (AMS-02) on the International Space Station, and discuss the merits of strangelets ...
openaire +4 more sources
, 2009 Using a linear stability analysis and two and three-dimensional nonlinear simulations, we study the physics of buoyancy instabilities in a combined thermal and relativistic (cosmic ray) plasma, motivated by the application to clusters of galaxies.
Balbus +30 more
core +1 more source
Cosmologically safe QCD axion as a present from extra dimension
Physics Letters B, 2015 We propose a QCD axion model where the origin of PQ symmetry and suppression of axion isocurvature perturbations are explained by introducing an extra dimension. Each extra quark–antiquark pair lives on branes separately to suppress PQ breaking operators.
Masahiro Kawasaki +2 more
doaj +1 more source
The Eddington Limit in Cosmic Rays: An Explanation for the Observed Faintness of Starbursting Galaxies [PDF]
, 2006 We show that the luminosity of a star forming galaxy is capped by the production and subsequent expulsion of cosmic rays from its interstellar medium. By defining an Eddington luminosity in cosmic rays, we show that the star formation rate of a given galaxy is limited by its mass content and the cosmic ray mean free path. When the cosmic ray luminosity
arxiv +1 more source
The Parker Instability with Cosmic Ray Streaming [PDF]
, 2018 Recent studies have found that cosmic ray transport plays an important role in feedback processes such as star formation and the launching of galactic winds. Although cosmic ray buoyancy is widely held to be a destabilizing force in galactic disks, the effect of cosmic ray transport on the stability of stratified systems has yet to be analyzed.
arxiv +1 more source
Cosmic X-ray surveys of distant active galaxies [PDF]
, 2015 We review results from cosmic X-ray surveys of active galactic nuclei (AGNs) over the past $$\approx 15$$≈15 years that have dramatically improved our understanding of growing supermassive black holes in the distant universe.
W. Brandt, D. Alexander
semanticscholar +1 more source
Journal of Polymer Science, EarlyView.ABSTRACT The highly cross‐linked (epoxy) matrix material in fiber reinforced polymers has a microscopic volume between fibers and therefore exhibits different mechanical behavior in comparison to standard bulk epoxy samples. It has been found in previous studies that a decreased epoxy gauge volume leads to an increased deformation ability (necking and ...
Janina Mittelhaus +9 more
wiley +1 more source