On the Origin of the Cosmic Radiation

Abstract

A theory of the origin of cosmic radiation is proposed according to which cosmic rays are originated and accelerated primarily in the interstellar space of the galaxy by collisions against moving magmetic 6elds. One of the features of the theory is that it yields naturally an inverse power law for the spectral distribution of the cosmic rays. The chief difhculty is that it fails to explain in a straightforward way the heavy nuclei observed in the primary radiation.

Monte Carlo simulations of a diffusive shock with multiple scattering angular distributions

“…It is well known that the diffusive acceleration model has been popular for more than five decades since Fermi (1949) first proposed that cosmic rays could be produced via diffusive processes. Until now, diffusive shock acceleration (DSA) (i.e.…”

A Search for Ultra-High Energy Neutrinos and Cosmic-Rays with ANITA-2

“…Acceleration through magnetic turbulence was first proposed as a mechanism for cosmic-ray acceleration by Fermi [19]. His initial proposal, known as second-order Fermi acceleration, involved clouds of dense material within the Galaxy with stronger magnetic fields than the surrounding interstellar medium.…”

“…3: ANITA-1 limits based on no surviving candidates for 18 days of livetime. Other limits are from AMANDA [16], RICE [17], ANITA-lite [8], Auger [18], HiRes [20], FORTE [19]. The BZ (GZK) neutrino model range is determined by a variety of models [11,21,23,25,26,27,29].…”

“…[19,24], the resulting model-independent 90% CL limit on neutrino fluxes with Standard Model cross-sections [22] is shown in Fig. 3.…”

Scaling properties of the Fermi-Ulam accelerator model

“…The Fermi accelerator model is a one-dimensional system originally proposed by Fermi in 1949 [1] to study cosmic rays. It provides a mechanism through which a charged particle can be accelerated by collision with a time-dependent magnetic field.…”