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Record Details

Record 58 of 8632
Relativistic cosmic-ray spectra in the fully nonlinear theory of shock acceleration
External Online Source: doi:10.1103/PhysRevLett.55.2735
Author and Affiliation:
Ellison, D. C.(NASA Goddard Space Flight Center, Greenbelt)
Eichler, D.(Maryland, University, College Park, MD)
Abstract: The non-linear theory of shock acceleration was generalized to include wave dynamics. In the limit of rapid wave damping, it is found that a finite wave velocity tempers the acceleration of high Mach number shocks and limits the maximum compression ratio even when energy loss is important. For a given spectrum, the efficiency of relativistic particle production is essentially independent of v sub Ph. For the three families shown, the percentage of kinetic energy flux going into relativistic particles is (1) 72 percent, (2) 44 percent, and (3) 26 percent (this includes the energy loss at the upper energy cutoff). Even small v sub ph, typical of the HISM, produce quasi-universal spectra that depend only weakly on the acoustic Mach number. These spectra should be close enough to e(-2) to satisfy cosmic ray source requirements.
Publication Date: Dec 09, 1985
Document ID:
19860034294
(Acquired Nov 28, 1995)
Accession Number: 86A19032
Subject Category: SPACE RADIATION
Document Type: Journal Article
Publication Information: Physical Review Letters (ISSN 0031-9007); 55; 2735-273
Publisher Information: United States
Contract/Grant/Task Num: NSF AST-83-17755
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Maryland Univ.; College Park, MD, United States
Negev Univ.; Beersheva, Israel
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ACCELERATION (PHYSICS); COSMIC RAYS; PARTICLE PRODUCTION; PARTICLE THEORY; SHOCK WAVES; SPECTRA; DIFFUSION; FLOW VELOCITY; MACH NUMBER; MOMENTUM; NONLINEARITY; PRESSURE; SCALING LAWS; SHOCK DISCONTINUITY
Imprint And Other Notes: Physical Review Letters (ISSN 0031-9007), vol. 55, Dec. 9, 1985, p. 2735-2738. NASA-supported research. Previously announced in STAR as N85-34896.
Miscellaneous Notes: NASA-supported research. Previously announced in STAR as N85-34896
Availability Source: Other Sources
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