Diffusion of Cosmic Rays in Expanding Universe. (I)

Details Diffusion of Cosmic Rays in Expanding Universe. (I) Diffusion of Cosmic Rays in Expanding Universe. (I)

2005-12-05

arxiv.org/abs/astro-ph/0512090v2

Astrophys.J.643:8-13,2006

Astronomy and Astrophysics

Astrophysics

The version with some changes, in the form accepted for publication in Ap.J

Scientific paper

10.1086/502626

We present an analytic solution to diffusion equation for high energy cosmic rays in the expanding universe. The particles are assumed to be ultra-relativistic and they can have energy losses arbitrarily dependent on energy and time. The obtained solution generalizes the Syrovatsky solution, valid for the case when energy losses and diffusion coefficient are time-independent.

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