NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Stochastic reacceleration of cosmic rays in the interstellar mediumThe effects of reacceleration on cosmic rays have been studied over a wide charge and energy range using a model of reacceleration by the interstellar turbulence. We take into account only inevitable stochastic reacceleration of cosmic rays by the random hydrodynamic waves, which supposedly exist in the interstellar medium and provide a means for cosmic-ray scattering and spatial diffusion in the Galaxy. Our calculations reproduce not only the B/C ratio but also the H and He data over the entire energy range where the measurements are available. However, the sub-Fe to Fe ratio is not fitted as well as the B/C ratio, and the reacceleration effect does not seem to remove the need for truncation of short path lengths, which is apparently required by the standard leaky box model. This work demonstrates that the cosmic-ray data can be represented at least as well by a reacceleration model with a simple rigidity power-law escape length, which agrees with the Kolmogorov-type spectrum of hydromagnetic turbulence, as they can by the standard leaky box model with its ad hoc escape lengths.
Document ID
19950029370
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Seo, E. S.
(Univ. of Maryland, College Park, MD United States)
Ptuskin, V. S.
(Univ. of Maryland, College Park, MD United States)
Date Acquired
August 16, 2013
Publication Date
August 20, 1994
Publication Information
Publication: The Astrophysical Journal
Volume: 431
Issue: 2 pt
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
95A60969
Funding Number(s)
CONTRACT_GRANT: NAGW-2504
CONTRACT_GRANT: NAGW-3526
CONTRACT_GRANT: NAG5-1299
CONTRACT_GRANT: FCPO 959213
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available