Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Full Refereed Journal Article (PDF/Postscript)
· Full Refereed Scanned Article (GIF)
· References in the article
· Citations to the Article (309) (Citation History)
· Refereed Citations to the Article
· Also-Read Articles (Reads History)
· Translate This Page
Effects of particle drift on cosmic-ray transport. I - General properties, application to solar modulation
Jokipii, J. R.; Levy, E. H.; Hubbard, W. B.
AA(Arizona, University, Tucson, Ariz.), AB(Arizona, University, Tucson, Ariz.), AC(Arizona, University, Tucson, Ariz.)
Astrophysical Journal, Part 1, vol. 213, May 1, 1977, p. 861-868. (ApJ Homepage)
Publication Date:
Space Radiation
NASA/STI Keywords:
Particle Diffusion, Solar Cosmic Rays, Solar Flares, Solar Wind Velocity, Transport Properties, Adiabatic Conditions, Interplanetary Magnetic Fields, Particle Flux Density
Bibliographic Code:


Although gradient and curvature drifts are explicitly contained in the general equations of cosmic-ray transport, they have been almost universally neglected in applications of these equations. The drifts are evaluated explicitly for the Parker (1965) spiral magnetic field, and it is shown that for particles with rigidities greater than about 0.3 GV in the solar wind, they are larger than the solar-wind velocity over much of the heliosphere. Hence most current models of solar modulation and solar-flare particle events neglect terms which in many cases are as important as those retained. Calculations are presented which demonstrate the importance of the effects for simple modulation models. It is concluded that comparisons of presently available model calculations with observations do not provide a fair test of transport theory since they neglect drifts, which may substantially reduce the net modulation.

Printing Options

Print whole paper
Print Page(s) through

Return 600 dpi PDF to Acrobat/Browser. Different resolutions (200 or 600 dpi), formats (Postscript, PDF, etc), page sizes (US Letter, European A4, etc), and compression (gzip,compress,none) can be set through the Printing Preferences

More Article Retrieval Options

HELP for Article Retrieval

Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)


Find Similar Abstracts:

Use: Authors
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
arXiv e-prints