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 (42) (Citation History)
· Refereed Citations to the Article
· Reads History
·
· Translate This Page
Title:
A comparison of predictions of a wavy neutral sheet drift model with cosmic-ray data over a whole modulation cycle - 1976-1987
Authors:
Webber, W. R.; Potgieter, M. S.; Burger, R. A.
Affiliation:
AA(New Hampshire, University, Durham), AB(Potchefstroom University for Christian Higher Education, Republic of South Africa), AC(Potchefstroom University for Christian Higher Education, Republic of South Africa)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 349, Feb. 1, 1990, p. 634-640. (ApJ Homepage)
Publication Date:
02/1990
Category:
Space Radiation
Origin:
STI
NASA/STI Keywords:
Astronomical Spectroscopy, Cosmic Rays, Neutral Sheets, Prediction Analysis Techniques, Astronomical Models, Drift Rate, Interplanetary Medium, Solar Activity Effects
DOI:
10.1086/168350
Bibliographic Code:
1990ApJ...349..634W

Abstract

A comprehensive set of predictions using a newly developed, axially symmetric, steady state, drift model with a wavy neutral sheet is compared with data obtained during an entire 11 yr solar modulation cycle from 1976 to 1987. The model accurately predicts the 1976 modulated proton and helium spectra starting with realistic interstellar spectra for these species, but only when drift effects are somewhat reduced. For 1981-1987, the proton intensities with energy of 60 MeV and higher and E = 120-227 MeV observed by IMP, and those predicted by this model as a function of neutral sheet tilt agree fairly well. These results suggest that the correlation between intensity and the observed tilt reported by other groups has a theoretical explanation in terms of a drift and a wavy neutral sheet picture. The model can explain many of the observed features of the 11 yr cycle, showing that drift together with the wavy neutral sheet probably play a significant role.

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)

  New!

Find Similar Abstracts:

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