Cosmic Ray Confinement and Transport Models for Probing their Putative Sources

Abstract

Recent efforts in cosmic ray (CR) confinement and transport theory are discussed. Three problems are addressed as being crucial for understanding the present day observations and their possible telltale signs of the CR origin. The first problem concerns CR behavior right after their release from a source, such as a supernova remnant (SNR). At this phase the CRs are confined near the source by self-emitted Alfven waves. The second is the problem of diffusive propagation of CRs through the turbulent ISM. This is a seemingly straightforward and long-resolved problem, but it remains controversial and reveals paradoxes. A resolution based on the Chapman-Enskog asymptotic CR transport analysis, that also includes magnetic focusing, is suggested. The third problem is about a puzzling sharp ($\sim 10^{\circ }$) anisotropies in the CR arrival directions that might bear on important clues of their transport between the source and observer. The overarching goal is to improve our understanding of all aspects of the CR's source escape and ensuing propagation through the galaxy to the level at which their sources can be identified observationally.

to appear in PoP

References in corpus (12)

• The outer scale of turbulence in the magneto-ionized Galactic interstellar medium
• Discovery of Localized Regions of Excess 10-TeV Cosmic Rays
• Origin of the Cosmic Ray Spectral Hardening
• Observations of the shell-type SNR Cassiopeia A at TeV energies with VERITAS
• Observation of Small-scale Anisotropy in the Arrival Direction Distribution of TeV Cosmic Rays with HAWC
• The puzzling MILAGRO hot spots
• Cosmic Ray Origins: An Introduction
• The Milagro anticenter hot spots: cosmic rays from the Geminga supernova ?
• Probing Nearby CR Accelerators and ISM Turbulence with Milagro Hot Spots
• The Diffusion Approximation vs. the Telegraph Equation for Modeling Solar Energetic Particle Transport with Adiabatic Focusing. I. Isotropic Pitch-angle Scattering
• Cosmic Ray Transport with Magnetic Focusing and the "Telegraph" model
• TeV cosmic-ray proton and helium spectra in the myriad model II

Cited by in corpus (3)

• An Exact Solution of the Fokker-Planck Equation for Isotropic Scattering
• The TeV Cosmic Ray Bump: a Message from Epsilon Indi or Epsilon Eridani Star?
• Plus Charge Prevalence in Cosmic Rays: Room for Dark Matter in the Positron Spectrum