Spectrum and anisotropy of cosmic rays at TeV–PeV-energiesстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 13 марта 2014 г.
Аннотация:The role of nearby galactic sources, the supernova remnants, in formation of observed energy spectrum
and large-scale anisotropy of high-energy cosmic rays is studied. The list of these sources is made up
based on radio, X-ray and gamma-ray catalogues. The distant sources are treated statistically as ensemble
of sources with random positions and ages. The source spectra are defined based on the modern theory of
cosmic ray acceleration in supernova remnants while the propagation of cosmic rays in the interstellar
medium is described in the frameworks of galactic diffusion model. Calculations of dipole component
of anisotropy are made to reproduce the experimental procedure of ‘‘two-dimensional’’ anisotropy measurements.
The energy dependence of particle escape time in the process of acceleration in supernova
remnants and the arm structure of sources defining the significant features of anisotropy are also taken
into account. The essential new trait of the model is a decreasing number of core collapse SNRs being able
to accelerate cosmic rays up to the given energy, that leads to steeper total cosmic ray source spectrum in
comparison with the individual source spectrum. We explained simultaneously the new cosmic ray data
on the fine structure of all particle spectrum around the knee and the amplitude and direction of the
dipole component of anisotropy in the wide energy range 1 TeV–1 EeV. Suggested assumptions do not
look exotic, and they confirm the modern understanding of cosmic ray origin.