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Relationship of Coronal Holes at Mid and Low Latitudes to the Mean Magnetic Field of the Sun

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The relationship between the magnetic fluxes and areas of coronal holes (CH) at mid and low latitudes |φ |< 60° and the mean magnetic field (MMF) of the sun over the period from January 19 through December 12, 2012, is studied using ultraviolet images and magnetograms obtained with the Solar Dynamics Observatory satellite. It is shown that the boundaries of the CH determined with the algorithms CHIMERA (https://solarmonitor.org) and SPoCA (https://helioviewer.org) differ significantly. The correlation coefficient between the weighted total area of CHs taking into account the magnetic field polarity and MMF are in the range from 0.82 to 0.88. The CH can make a substantial contribution to the MMF since their fields have an open configuration and are not balanced on the solar disk. In light of the solar dynamo theory and the results obtained here, the annual time delays between the maxima of the Wolf numbers and the values of the MMF are discussed.

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Authors and Affiliations

  1. FGBUN “KrAO RAN” (Crimean Astrophysical Observatory, CrAO), Nauchnyi, Crimea, Russia

    Z. S. Akhtemov, Y. T. Tsap & V. I. Haneychuk

Authors
  1. Z. S. Akhtemov
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  2. Y. T. Tsap
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  3. V. I. Haneychuk
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Correspondence to Z. S. Akhtemov.

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Translated from Astrofizika, Vol. 63, No. 3, pp. 451-461 (August 2020)

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Akhtemov, Z.S., Tsap, Y.T. & Haneychuk, V.I. Relationship of Coronal Holes at Mid and Low Latitudes to the Mean Magnetic Field of the Sun. Astrophysics 63, 399–407 (2020). https://doi.org/10.1007/s10511-020-09644-1

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  • DOI: https://doi.org/10.1007/s10511-020-09644-1

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