Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992azh....69.1083r&link_type=abstract
Astronomicheskij Zhurnal (ISSN 0004-6299), vol. 69, no. 5, p. 1083-1089.
Astronomy and Astrophysics
Astronomy
18
Annual Variations, Magnetic Measurement, Photosphere, Solar Magnetic Field, Diurnal Variations, Frequency Distribution, Stellar Magnetic Fields
Scientific paper
The frequency composition of the general magnetic field of the sun as a star is determined on the basis of Stanford observations, as well as linear and square-law detection of the field during the period June 1975-December 1990. Four groups of significant harmonics are identified: long-period (greater than about 1 yr), and 27-, 13-, and 9-d variations. A detailed analysis of the spectrum of diurnal values of B(s), B(s)-parallel, and B(s)-squared, as well as of their semiannual mean values and dispersions reveals a complex structure of long-period B(s) variations (about 20-, 6-, 2-, and 1-yr variations). The agreement of frequency characteristics of long-period B(s) variations with those of the interplanetary magnetic field is discussed. The cause of the 11-yr cyclicity appearing in the detected B(s) values is analyzed.
Obridko Vladimir N.
Rivin Yu. R.
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