Small scale solar magnetic fields and their relation to various solar activity indices

Details Small scale solar magnetic fields and their relation to various solar activity indices Small scale solar magnetic fields and their relation to various solar activity indices

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..93..141t&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 93, no. 1, June 1983, p. 141-147.

Astronomy and Astrophysics

Astrophysics

Solar Activity, Solar Magnetic Field, Correlation Coefficients, Faculae, Indexes (Ratios), Photosphere, Sunspots, Umbras

Scientific paper

Correlation studies between various solar activity indices and a long time series of annual sums of the maximum value of solar magnetic field intensity, observed for each group of sunspots during each passage of it over the visible solar hemisphere, have pointed out a couple of interesting points. First, the faculae have a significant contribution to the numerical representation of the small scale solar magnetic fields. Second, the area index of the solar activity, which contains faculae, succeeds both high correlation coefficients and low standard errors of estimation to the above mentioned maximum values of the solar magnetic field. These properties give the area index an important physical meaning which is a first approximation to the small scale solar magnetic fields expressed by the above-mentioned maximum values of it. Finally, the main point which comes out is that long term studies of the solar magnetic fields, especially extrapolated studies to the past, could be supported by photospheric indices of the solar activity.

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