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Energy spectra of the main groups of galactic cosmic rays in the model of three classes of sources

We suggest a model to consistently describe the available experimental data on the elemental cosmic-ray energy spectra obtained in direct measurements and to make a smooth transition to the spectrum of all particles measured with extensive air showers. The model suggests the existence of three class...

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Published in:	Astronomy letters 2007-01, Vol.33 (1), p.25-33
Main Authors:	Zatsepin, V I, Sokolskaya, N V
Format:	Article
Language:	English
Subjects:	Cosmic ray showers Cosmic rays Energy spectra Explosions Galactic cosmic rays Interstellar matter Interstellar medium Rigidity Supernova Supernovae
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description	We suggest a model to consistently describe the available experimental data on the elemental cosmic-ray energy spectra obtained in direct measurements and to make a smooth transition to the spectrum of all particles measured with extensive air showers. The model suggests the existence of three classes of cosmic-ray sources--shocks from supernova explosions that produce power-law rigidity spectra with different maximum rigidities and different spectral indices. The shocks from high-mass supernovae exploding in OB associations are assumed to be the most powerful class of sources. This class of sources accelerates cosmic rays to a maximum rigidity of 4 X 10 V. The shocks from nonassociated supernovae exploding into a random interstellar medium are assumed to be the next class (in order of decreasing power). This class of sources accelerates cosmic rays to a maximum rigidity of 5 X 10 V. The third, weakest class of sources is assumed to accelerate cosmic rays to a maximum rigidity of 2 X 10 V. Nova explosions could be possible physical objects in this class.
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subjects	Cosmic ray showers Cosmic rays Energy spectra Explosions Galactic cosmic rays Interstellar matter Interstellar medium Rigidity Supernova Supernovae
title	Energy spectra of the main groups of galactic cosmic rays in the model of three classes of sources
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