Sunspot index infers a small RELICT magnetic field in the sun's core

Details Sunspot index infers a small RELICT magnetic field in the sun's core Sunspot index infers a small RELICT magnetic field in the sun's core

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.306..670s&link_type=abstract

Nature (ISSN 0028-0836), vol. 306, Dec. 15, 1983, p. 670-673.

Physics

22

Magnetic Dipoles, Remanence, Solar Magnetic Field, Sunspots, Frequency Modulation, Least Squares Method, Long Term Effects, Solar Cycles, Solar Spectra

Scientific paper

Inferences from the asymmetry in time of the solar sunspot number, taken over many cycles, yields evidence for the relict magnetic field in the solar core which Cowling (1945) suggested would not decay, over the solar system's lifetime, given sufficiently high bulk electrical conductivity. Whether such a relict field is present can be ascertained either by searching for the presence of a 22-year line quintet in the Fourier spectrum of the sunspot index or by processing the time sequence in order to highlight an offset. Since the solar cycle is unstable to frequency drifts, the presence of frequency modulation can lead to a spurious relict field signal.

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