Cosmic ray acceleration in magnetic circumstellar bubbles
classification
🌌 astro-ph.HE
keywords
bubblesaccelerationcosmicenergystellaracceleratedcircumstellarconsider
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We consider the diffusive shock acceleration in interstellar bubbles created by powerful stellar winds of supernova progenitors. Under the moderate stellar wind magnetization the bubbles are filled by the strongly magnetized low density gas. It is shown that the maximum energy of particles accelerated in this environment can exceed the "knee" energy in the observable cosmic ray spectrum.
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