Modeling supernova remnants: effects of diffusive cosmic-ray acceleration on the evolution and application to observationsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We present numerical models for supernova remnant evolution, using a new
version of the hydrodynamical code SUPREMNA. We added a cosmic-ray
diffusion equation to the code scheme, employing a two-fluid
approximation. We investigate the dynamics of the simulated supernova
remnants with different values of the cosmic-ray acceleration efficiency
and the diffusion coefficient. We compare the numerical models with
observational data of Tycho's and SN1006 supernova remnants. We find models that
reproduce the observed locations of the blast wave, contact
discontinuity, and reverse shock for both remnants, thus allowing us to
estimate the contribution of cosmic-ray particles to total pressure and
cosmic-ray energy losses in these supernova remnants. We evaluate the
energy losses due to cosmic rays escape in Tycho's
supernova remnant to be 10 - 20\% of the kinetic energy flux and 20 - 50\%
in SN1006.