期刊
ADVANCES IN SPACE RESEARCH
卷 40, 期 7, 页码 1064-1069出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.asr.2007.02.007
关键词
galactic cosmic rays; heliosphere; heliospheric current sheet tilt angle
Using data on cosmic ray modulation parameter since 1951, we have estimated the evolution of the heliospheric current sheet tilt angle for the period 1951-1975, i.e., 25 years before regular observations of the tilt angle. This estimate is based on our recent empirical model relating cosmic ray intensity with global heliospheric parameters. We propose a simple model to describe the cyclic evolution of the tilt angle with the solar cycle. This model agrees with available observational data. Using this model, we have estimated the cosmic ray intensity since 1710. This estimate is consistent with the results based on cosmogenic isotopes (C-14 and Be-10). (C) 2007 COSPAR. Published by Elsevier Ltd. All rights reserved.
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