高エネルギー電子の銀河内伝播

概要

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We investigate the propagation of high energy cosmic ray electrons in the Galaxy on the bases of leaky box and nested leaky box model. Here, we use new approximate expansion to evaluate the formula to see the spectral changes of the electron spectrum according to the variations of the parameters in these models. Numerical integrations are also performed to make more detail comparison with our observed electron spectrum upto 2 TeV. In the nested leaky box model, we also treat the case in which energy dependence of the electron life time is different in the source region and in the galactic space. Relationships are discussed between the parameters of this energy dependence and ratio of energy loss of electrons in the source region to that in the galactic space, which give good agreements with the observed spectrum. Astrophysical significance of these parameters are also discussed in this paper.
宇宙航空研究開発機構の論文