Preliminary results of short-term variability of sunspot magnetic fields as observed at Cuba.

Details Preliminary results of short-term variability of sunspot magnetic fields as observed at Cuba. Preliminary results of short-term variability of sunspot magnetic fields as observed at Cuba.

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992bsold...2...88n&link_type=abstract

Byulletin Solnechnye Dannye Akademie Nauk USSR, No. 2/92, p. 88 - 93

Astronomy and Astrophysics

Astronomy

Scientific paper

Measurements of the intensity of sunspot magnetic fields H(t) have been made with the measuring microscope UIM-23. An estimation of the accuracy of the measurements with the telescope of the Central Astronomical Observatory of the Russian Academy of Sciences is σ = 60 G. Observations of 12 sunspots confirm the presence of the oscillatory component of the H(t) variations, connected with the intrinsic sunspot properties. Estimations of oscillatory parameters H(t) have been made. Their periods are between T = 40 - 110m, amplitudes A = 60 - 220 G. The data indicate a possible nonlinear character of oscillations H(t).

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