Anomalous Anisotropies of Cosmic Rays from Turbulent Magnetic Fields

Дата и время публикации : 2013-10-21T20:00:29Z

Авторы публикации и институты :
Markus Ahlers

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 4 pages, 1 figure
Первичная категория: astro-ph.HE

Все категории : astro-ph.HE, hep-ex, hep-ph

Краткий обзор статьи: The propagation of cosmic rays (CRs) in turbulent interstellar magnetic fields is typically described as a spatial diffusion process. This formalism predicts only a small deviation from an isotropic CR distribution in the form of a dipole in the direction of the CR density gradient or relative background flow. We show that the existence of a global CR dipole moment necessarily generates a spectrum of higher multipole moments in the local CR distribution. These "anomalous" anisotropies are a direct consequence of Liouville’s theorem in the presence of a local turbulent magnetic field. We show that the predictions of this model are in excellent agreement with the observed power spectrum of multi-TeV CRs.

Category: Physics